CSS documentation index

Found 904 pages:

#	Page	Tags and summary
1	CSS: Cascading Style Sheets	CSS, Cascading Style Sheets, Design, Landing, Layout, Reference, Style Sheets, Styles, Stylesheets, l10n:priority
		Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in HTML
2	-moz-binding	CSS, CSS Property, CSS:Mozilla Extensions, Deprecated, Mozilla, NeedsMobileBrowserCompatibility, NeedsUpdate, Non-standard, Reference, XBL, XUL
		The -moz-binding CSS property is used by Mozilla-based applications to attach an XBL binding to a DOM element.
3	-moz-border-bottom-colors	CSS, CSS Property, Non-standard, Obsolete, Reference
		In Mozilla applications like Firefox, the -moz-border-bottom-colors CSS property sets a list of colors for the bottom border.
4	-moz-border-left-colors	CSS, CSS Property, Non-standard, Obsolete, Reference
		In Mozilla applications like Firefox, the -moz-border-left-colors CSS property sets a list of colors for the left border.
5	-moz-border-right-colors	CSS, CSS Property, CSS:Mozilla Extensions, Non-standard, Obsolete, Reference
		In Mozilla applications like Firefox, the -moz-border-right-colors CSS property sets a list of colors for the right border.
6	-moz-border-top-colors	CSS, CSS Property, CSS:Mozilla Extensions, Non-standard, Obsolete, Reference
		In Mozilla applications like Firefox, the -moz-border-top-colors CSS property sets a list of colors for the top border.
7	-moz-box-ordinal-group	CSS, CSS:Mozilla Extensions, Flexible Box, Non-standard, Reference
		Indicates the ordinal group the element belongs to. Elements with a lower ordinal group are displayed before those with a higher ordinal group.
8	-moz-cell	CSS, CSS Value, Deprecated, Reference
		Don't use this value! Use the cursor value cell instead.
9	-moz-context-properties	-moz-context-properties, CSS, CSS Property, CSS:Mozilla Extensions, Experimental, Needs Privileges, Non-standard, Reference
		If you reference an SVG image in a webpage (such as with the <img> element or as a background image), the SVG image can coordinate with the embedding element (its context) to have the image adopt property values set on the embedding element. To do this the embedding element needs to list the properties that are to be made available to the image by listing them as values of the -moz-context-properties property, and the image needs to opt in to using those properties by using values such as the context-fill value.
10	-moz-float-edge	CSS, CSS Property, CSS:Mozilla Extensions, Layout, NeedsCompatTable, Non-standard
		The non-standard -moz-float-edge CSS property specifies whether the height and width properties of the element include the margin, border, or padding thickness.
11	-moz-force-broken-image-icon	CSS, NeedsCompatTable, Non-standard, Reference
		The -moz-force-broken-image-icon extended CSS property can be used to force the broken image icon to be shown even when a broken image has an alt attribute.
12	-moz-image-rect	CSS, CSS Function, Non-standard, Reference
		The -moz-image-rect value for CSS background-image lets you use a portion of a larger image as a background. This allows you to, for example, use different parts of one larger image as backgrounds in different parts of your content.
13	-moz-image-region	CSS, CSS Property, Non-standard, Reference
		For certain XUL elements and pseudo-elements that use an image from the list-style-image property, this property specifies a region of the image that is used in place of the whole image. This allows elements to use different pieces of the same image to improve performance.
14	-moz-orient	CSS, CSS Property, Non-standard, Reference
		The -moz-orient CSS property specifies the orientation of the element to which it's applied.
15	-moz-outline-radius	CSS, CSS Property, Non-standard, Reference
		In Mozilla applications like Firefox, the -moz-outline-radius CSS property can be used to give an element's outline rounded corners.
16	-moz-outline-radius-bottomleft	CSS, CSS Property, NeedsCompatTable, NeedsContent, Non-standard, Reference
		In Mozilla applications, the -moz-outline-radius-bottomleft CSS property can be used to round the bottom-left corner of an element's outline.
17	-moz-outline-radius-bottomright	CSS, CSS Property, NeedsCompatTable, NeedsContent, Non-standard, Reference
		In Mozilla applications, the -moz-outline-radius-bottomright CSS property can be used to round the bottom-right corner of an element's outline.
18	-moz-outline-radius-topleft	CSS, CSS Property, NeedsCompatTable, NeedsContent, Non-standard, Reference
		In Mozilla applications, the -moz-outline-radius-topleft CSS property can be used to round the top-left corner of an element's outline.
19	-moz-outline-radius-topright	CSS, CSS Property, NeedsCompatTable, NeedsContent, Non-standard, Reference
		In Mozilla applications, the -moz-outline-radius-topright CSS property can be used to round the top-right corner of an element's outline.
20	-moz-stack-sizing	CSS, CSS Property, NeedsCompatTable, Non-standard, Reference, XUL
		-moz-stack-sizing is an extended CSS property. Normally, a stack will change its size so that all of its child elements are completely visible. For example, moving a child of the stack far to the right will widen the stack so the child remains visible.
21	-moz-text-blink	CSS, CSS Property, CSS:Mozilla Extensions, Deprecated, Non-standard, Reference
		The -moz-text-blink non-standard Mozilla CSS extension specifies the blink mode.
22	-moz-user-focus	CSS, CSS:Mozilla Extensions, NeedsBrowserCompatibility, NeedsContent, NeedsMobileBrowserCompatibility, Non-standard, Reference
		The -moz-user-focus CSS property is used to indicate whether an element can have the focus.
23	-moz-user-input	CSS, CSS Property, CSS:Mozilla Extensions, Non-standard, Reference
		In Mozilla applications, -moz-user-input determines if an element will accept user input.
24	-moz-user-modify	CSS, Deprecated, NeedsMobileBrowserCompatibility, Non-standard, Reference
		The -moz-user-modify property has no effect. It was originally planned to determine whether or not the content of an element can be edited by a user.
25	-moz-window-shadow	CSS, CSS Property, NeedsCompatTable, Non-standard, Reference, XUL
		The -moz-window-shadow CSS property specifies whether a window will have a shadow. It only works on Mac OS X.
26	-ms-accelerator	CSS, CSS Property, Non-standard, Reference
		The -ms-accelerator CSS property is a Microsoft extension that sets or retrieves a string indicating whether the object represents a keyboard shortcut.
27	-ms-block-progression	CSS, CSS Property, Non-standard, Reference
		The -ms-block-progression CSS property is a Microsoft extension that specifies the block progression and layout orientation.
28	-ms-content-zoom-chaining	CSS, CSS Property, Non-standard, Reference
		The -ms-content-zoom-chaining CSS property is a Microsoft extension specifying the zoom behavior that occurs when a user hits the zoom limit during page manipulation.
29	-ms-content-zoom-limit	CSS, CSS Property, Non-standard, Reference
		The -ms-content-zoom-limit CSS shorthand property is a Microsoft extension that specifies values for the -ms-content-zoom-limit-min and -ms-content-zoom-limit-max properties.
30	-ms-content-zoom-limit-max	CSS, CSS Property, Non-standard, Reference
		The -ms-content-zoom-limit-max CSS property is a Microsoft extension that specifies the selected elements' maximum zoom factor.
31	-ms-content-zoom-limit-min	CSS, CSS Property, Non-standard, Reference
		The -ms-content-zoom-limit-min CSS property is a Microsoft extension that specifies the minimum zoom factor.
32	-ms-content-zoom-snap	CSS, CSS Property, Non-standard, Reference
		The -ms-content-zoom-snap CSS shorthand property is a Microsoft extension that specifies values for the -ms-content-zoom-snap-type and -ms-content-zoom-snap-points properties.
33	-ms-content-zoom-snap-points	CSS, CSS Property, Non-standard, Reference
		The -ms-content-zoom-snap-points CSS property is a Microsoft extension that specifies where zoom snap-points are located.
34	-ms-content-zoom-snap-type	CSS, CSS Property, Non-standard, Reference
		The -ms-content-zoom-snap-type CSS property is a Microsoft extension that specifies how zooming is affected by defined snap-points.
35	-ms-content-zooming	CSS, CSS Property, Non-standard, Reference
		The -ms-content-zooming CSS property is a Microsoft extension that specifies whether zooming is enabled.
36	-ms-filter	CSS, CSS Property, CSS:Microsoft Extensions, Non-standard, Obsolete, Reference
		The -ms-filter CSS property is a Microsoft extension that sets or retrieves the filter or collection of filters applied to an object.
37	-ms-flow-from	CSS, CSS Property, Non-standard, Reference
		The -ms-flow-from CSS property is a Microsoft extension that gets or sets a value identifying a region container in the document that accepts the content flow from the data source.
38	-ms-flow-into	CSS, CSS Property, Non-standard, Reference
		The -ms-flow-into CSS property is a Microsoft extension that gets or sets a value identifying an iframe container in the document that serves as the region's data source.
39	-ms-high-contrast-adjust	CSS, CSS Property, Non-standard, Reference
		The -ms-high-contrast-adjust CSS property is a Microsoft extension that gets or sets a value indicating whether to override any CSS properties that would have been set in high contrast mode.
40	-ms-hyphenate-limit-chars	CSS, CSS Property, Non-standard, Reference
		The -ms-hyphenate-limit-chars CSS property is a Microsoft extension that specifies one to three values indicating the minimum number of characters in a hyphenated word. If the word does not meet the required minimum number of characters in the word, before the hyphen, or after the hyphen, then the word is not hyphenated.
41	-ms-hyphenate-limit-lines	CSS, CSS Property, Non-standard, Reference
		The -ms-hyphenate-limit-lines CSS property is a Microsoft extension specifying the maximum number of consecutive lines in an element that may be ended with a hyphenated word.
42	-ms-hyphenate-limit-zone	CSS, CSS Property, Non-standard, Reference
		The -ms-hyphenate-limit-zone CSS property is a Microsoft extension specifying the width of the hyphenation zone.
43	-ms-ime-align	CSS, CSS Property, NeedsBrowserCompatibility, Non-standard, Reference
		The -ms-ime-align CSS property is a Microsoft extension aligning the Input Method Editor (IME) candidate window box relative to the element on which the IME composition is active. The extension is implemented in Microsoft Edge and Internet Explorer 11.
44	-ms-overflow-style	CSS, CSS Property, NeedsBrowserCompatibility, NeedsCompatTable, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Reference
		The -ms-overflow-style CSS property is a Microsoft extension controlling the behavior of scrollbars when the content of an element overflows.
45	-ms-scroll-chaining	CSS, CSS Property, Non-standard, Reference
		The -ms-scroll-chaining CSS property is a Microsoft extension that specifies the scrolling behavior that occurs when a user hits the scroll limit during a manipulation.
46	-ms-scroll-limit	CSS, CSS Property, Non-standard, Reference
		The -ms-scroll-limit CSS property is a Microsoft extension that specifies values for the -ms-scroll-limit-x-min, -ms-scroll-limit-y-min, -ms-scroll-limit-x-max, and -ms-scroll-limit-y-max properties.
47	-ms-scroll-limit-x-max	CSS, CSS Property, Non-standard, Reference
		The -ms-scroll-limit-x-max CSS property is a Microsoft extension that specifies the maximum value for the Element.scrollLeft property.
48	-ms-scroll-limit-x-min	CSS, CSS Property, Non-standard, Reference
		The -ms-scroll-limit-x-min CSS property is a Microsoft extension that specifies the minimum value for the Element.scrollLeft property.
49	-ms-scroll-limit-y-max	CSS, CSS Property, Non-standard, Reference
		The -ms-scroll-limit-y-max CSS property is a Microsoft extension that specifies the maximum value for the Element.scrollTop property.
50	-ms-scroll-limit-y-min	CSS, CSS Property, Non-standard, Reference
		The -ms-scroll-limit-y-min CSS property is a Microsoft extension that specifies the minimum value for the Element.scrollTop property.
51	-ms-scroll-rails	CSS, CSS Property, Non-standard, Reference
		The -ms-scroll-rails CSS property is a Microsoft extension that specifies whether scrolling locks to the primary axis of motion.
52	-ms-scroll-snap-points-x	CSS, CSS Property, Non-standard, Reference
		The -ms-scroll-snap-points-x CSS property is a Microsoft extension that specifies where snap-points will be located along the x-axis.
53	-ms-scroll-snap-points-y	CSS, CSS Property, CSS Scroll Snap, CSS:Microsoft Extensions, Non-standard, Reference
		The -ms-scroll-snap-points-y CSS property is a Microsoft extension that specifies where snap-points will be located along the y-axis.
54	-ms-scroll-snap-x	CSS, CSS Property, CSS Scroll Snap, CSS:Microsoft Extensions, Non-standard, Reference
		The -ms-scroll-snap-x CSS shorthand property is a Microsoft extension that specifies values for the -ms-scroll-snap-type and -ms-scroll-snap-points-x properties.
55	-ms-scroll-snap-y	CSS, CSS Property, CSS Scroll Snap, CSS:Microsoft Extensions, Non-standard, Reference
		The -ms-scroll-snap-x CSS shorthand property is a Microsoft extension that specifies values for the -ms-scroll-snap-type and -ms-scroll-snap-points-y properties.
56	-ms-scroll-translation	CSS, CSS Property, CSS Scroll Snap, CSS:Microsoft Extensions, Non-standard, Reference
		The -ms-scroll-translation CSS property is a Microsoft extension that specifies whether vertical-to-horizontal scroll wheel translation occurs on the specified element.
57	-ms-scrollbar-3dlight-color	CSS, CSS Property, Non-standard, Obsolete, Reference
		The -ms-scrollbar-3dlight-color CSS property is a Microsoft extension specifying the color of the top and left edges of the scroll box and scroll arrows of a scroll bar.
58	-ms-scrollbar-arrow-color	CSS, CSS Property, Non-standard, Obsolete, Reference
		The -ms-scrollbar-arrow-color CSS property is a Microsoft extension that specifies the color of the arrow elements of a scroll arrow.
59	-ms-scrollbar-base-color	CSS, CSS Property, Non-standard, Obsolete, Reference
		The -ms-scrollbar-base-color CSS property is a Microsoft extension that specifies the base color of the main elements of a scroll bar.
60	-ms-scrollbar-darkshadow-color	CSS, CSS Property, Non-standard, Obsolete, Reference
		The -ms-scrollbar-darkshadow-color CSS property is a Microsoft extension that specifies the color of a scroll bar's gutter.
61	-ms-scrollbar-face-color	CSS, CSS Property, Non-standard, Obsolete, Reference
		The -ms-scrollbar-face-color CSS property is a Microsoft extension that specifies the color of the scroll box and scroll arrows of a scroll bar.
62	-ms-scrollbar-highlight-color	CSS, CSS Property, Non-standard, Obsolete, Reference
		The -ms-scrollbar-highlight-color CSS property is a Microsoft extension that specifies the color of the slider tray, the top and left edges of the scroll box, and the scroll arrows of a scroll bar.
63	-ms-scrollbar-shadow-color	CSS, CSS Property, Non-standard, Obsolete, Reference
		The -ms-scrollbar-shadow-color CSS property is a Microsoft extension that specifies the color of the bottom and right edges of the scroll box and scroll arrows of a scroll bar.
64	-ms-scrollbar-track-color	CSS, CSS Property, Non-standard, Obsolete, Reference
		The -ms-scrollbar-track-color CSS property is a Microsoft extension that specifies the color of the track element of a scrollbar.
65	-ms-text-autospace	CSS, CSS Property, CSS:Microsoft Extensions, Non-standard, Reference
		The -ms-text-autospace CSS property is a Microsoft extension that specifies the autospacing and narrow space width adjustment of text.
66	-ms-touch-select	CSS, CSS Property, CSS:Microsoft Extensions, Non-standard, Reference
		The -ms-touch-select CSS property is a Microsoft extension that toggles the gripper visual elements that enable touch text selection.
67	-ms-wrap-flow	CSS, CSS Property, CSS:Microsoft Extensions, Non-standard, Reference
		The -ms-wrap-flow CSS property is a Microsoft extension that specifies how exclusions impact inline content within block-level elements.
68	-ms-wrap-margin	CSS, CSS Property, CSS:Microsoft Extensions, Non-standard, Reference
		The -ms-wrap-margin CSS property is a Microsoft extension that specifies a margin that offsets the inner wrap shape from other shapes.
69	-ms-wrap-through	CSS, CSS Property, CSS:Microsoft Extensions, Non-standard, Reference
		The -ms-wrap-through CSS property is a Microsoft extension that specifies how content should wrap around an exclusion element.
70	-webkit-border-before	CSS, CSS Property, Non-standard, Reference
		The -webkit-border-before CSS property is a shorthand property for setting the individual logical block start border property values in a single place in the style sheet.
71	-webkit-box-reflect	CSS, CSS Property, Non-standard, Reference, WebKit
		The -webkit-box-reflect CSS property lets you reflect the content of an element in one specific direction.
72	-webkit-mask-attachment	CSS, CSS Property, Layout, Non-standard, Reference, Web
		If a -webkit-mask-image is specified, -webkit-mask-attachment determines whether the mask image's position is fixed within the viewport, or scrolls along with its containing block.
73	-webkit-mask-box-image	CSS, Layout, Non-standard, Reference, Web
		-webkit-mask-box-image sets the mask image for an element's border box.
74	-webkit-mask-composite	CSS, CSS Masking, CSS Property, Non-standard, Reference
		The -webkit-mask-composite property specifies the manner in which multiple mask images applied to the same element are composited with one another.
75	-webkit-mask-position-x	CSS, CSS Masking, CSS Property, Non-standard, Reference
		The -webkit-mask-position-x CSS property sets the initial horizontal position of a mask image.
76	-webkit-mask-position-y	CSS, CSS Masking, CSS Property, Non-standard, Reference
		The -webkit-mask-position-y CSS property sets the initial vertical position of a mask image.
77	-webkit-mask-repeat-x	CSS, CSS Masking, CSS Property, NeedsBrowserCompatibility, NeedsMobileBrowserCompatibility, Non-standard, Reference
		The -webkit-mask-repeat-x property specifies whether and how a mask image is repeated (tiled) horizontally.
78	-webkit-mask-repeat-y	CSS, CSS Masking, CSS Property, NeedsBrowserCompatibility, NeedsMobileBrowserCompatibility, Non-standard, Reference
		The -webkit-mask-repeat-y property specifies whether and how a mask image is repeated (tiled) vertically.
79	-webkit-overflow-scrolling	CSS, CSS Property, NeedsLiveSample, Non-standard, Reference
		The -webkit-overflow-scrolling CSS property controls whether or not touch devices use momentum-based scrolling for a given element.
80	-webkit-print-color-adjust	CSS, CSS Property, Layout, Non-standard, Web
		The -webkit-print-color-adjust property is a non-standard CSS extension that can be used to force printing of background colors and images in browsers based on the WebKit engine.
81	-webkit-tap-highlight-color	CSS, CSS Property, NeedsCompatTable, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Reference
		-webkit-tap-highlight-color is a non-standard CSS property that sets the color of the highlight that appears over a link while it's being tapped. The highlighting indicates to the user that their tap is being successfully recognized, and indicates which element they're tapping on.
82	-webkit-text-fill-color	CSS, CSS Property, Non-standard, Reference
		The -webkit-text-fill-color CSS property specifies the fill color of characters of text. If this property is not set, the value of the color property is used.
83	-webkit-text-stroke	CSS, CSS Property, Non-standard, Reference, WebKit
		The -webkit-text-stroke CSS property specifies the width and color of strokes for text characters. This is a shorthand property for the longhand properties -webkit-text-stroke-width and -webkit-text-stroke-color.
84	-webkit-text-stroke-color	CSS, CSS Property, Non-standard, Reference, WebKit
		The -webkit-text-stroke-color CSS property specifies the stroke color of characters of text. If this property is not set, the value of the color property is used.
85	-webkit-text-stroke-width	CSS, CSS Property, Non-standard, Reference, WebKit
		The -webkit-text-stroke-width CSS property specifies the width of the stroke for text.
86	-webkit-touch-callout	CSS, CSS Property, Layout, NeedsLiveSample, Non-standard, Reference, WebKit
		The -webkit-touch-callout CSS property controls the display of the default callout shown when you touch and hold a touch target.
87	:-moz-broken	CSS, CSS:Mozilla Extensions, NeedsCompatTable, Non-standard, Pseudo-class, Reference
		The :-moz-broken CSS pseudo-class is a Mozilla extension that matches elements representing broken image links.
88	:-moz-drag-over	CSS, CSS:Mozilla Extensions, NeedsCompatTable, Non-standard, Pseudo-class, Reference
		The :-moz-drag-over CSS pseudo-class is is a Mozilla extension that matches an element when a dragover event is called on it.
89	:-moz-first-node	CSS, CSS:Mozilla Extensions, NeedsCompatTable, Non-standard, Pseudo-class, Reference
		The :-moz-first-node CSS pseudo-class is a Mozilla extension that represents any element that is the first child node of some other element. It differs from :first-child because it does not match a first-child element with (non-whitespace) text before it.
90	:-moz-focusring	CSS, CSS:Mozilla Extensions, Non-standard, Pseudo-class, Reference
		The :-moz-focusring CSS pseudo-class is a Mozilla extension that is similar to the :focus pseudo-class, but it only matches an element if it's currently focused and a focus ring or other indicator should be drawn around it.
91	:-moz-full-screen-ancestor	CSS, CSS:Mozilla Extensions, Deprecated, Non-standard, Pseudo-class, Reference
		The :-moz-full-screen-ancestor CSS pseudo-class is a Mozilla extension that represents all ancestors of the full-screen element, except containing frames in parent documents, which are the full-screen element in their own documents. However, those elements' ancestors have this pseudo-class applied to them.
92	:-moz-handler-blocked	CSS, CSS:Mozilla Extensions, Non-standard, Pseudo-class, Reference
		The :-moz-handler-blocked CSS pseudo-class is a Mozilla extension that matches elements that can't be displayed because their handlers have been blocked.
93	:-moz-handler-crashed	CSS, CSS:Mozilla Extensions, Non-standard, Pseudo-class, Reference
		The :-moz-handler-crashed CSS pseudo-class is a Mozilla extension that matches elements that can't be displayed because the plugin responsible for drawing them has crashed.
94	:-moz-handler-disabled	CSS, CSS:Mozilla Extensions, Non-standard, Pseudo-class, Reference
		The :-moz-handler-disabled CSS pseudo-class is a Mozilla extension that matches elements that can't be displayed because their handlers have been disabled by the user.
95	:-moz-last-node	CSS, CSS:Mozilla Extensions, NeedsCompatTable, Non-standard, Pseudo-class
		The :-moz-last-node CSS pseudo-class is a Mozilla extension that represents any element that is the last child node of some other element. It differs from :last-child because it does not match a last-child element with (non-whitespace) text after it.
96	:-moz-loading	CSS, CSS:Mozilla Extensions, NeedsCompatTable, Non-standard, Pseudo-class, Reference
		The :-moz-loading CSS pseudo-class is a Mozilla extension that matches elements that can't be displayed because they have not started loading, such as images that haven't started to arrive yet. Note that images that are in the process of loading are not matched by this pseudo-class.
97	:-moz-locale-dir(ltr)	CSS, CSS:Mozilla Extensions, Localization, NeedsCompatTable, Non-standard, Pseudo-class, Reference
		The :-moz-locale-dir(ltr) CSS pseudo-class is a Mozilla extension that matches an element if the user interface is being displayed left-to-right. This is determined by the preference intl.uidirection.locale (where locale is the current locale) being set to "ltr".
98	:-moz-locale-dir(rtl)	CSS, CSS:Mozilla Extensions, Localization, NeedsCompatTable, NeedsExample, Non-standard, Pseudo-class, Reference, Right-to-left
		The :-moz-locale-dir(rtl) CSS pseudo-class is a Mozilla extension that matches an element if the user interface is being displayed right-to-left. This is determined by the preference intl.uidirection.locale (where locale is the current locale) being set to "rtl".
99	:-moz-lwtheme	CSS, Lightweight themes, NeedsCompatTable, NeedsExample, Non-standard, Pseudo-class, Reference, Themes
		The :-moz-lwtheme pseudo-class matches in chrome documents when the root element's lightweightthemes attribute is true and a theme is selected.
100	:-moz-lwtheme-brighttext	CSS, Non-standard, Pseudo-class, Reference, Themes
		The :-moz-lwtheme-brighttext pseudo-class matches in chrome documents when :-moz-lwtheme is true and a lightweight theme with a bright text color is selected.
101	:-moz-lwtheme-darktext	CSS, Non-standard, Pseudo-class, Reference, Themes
		The :-moz-lwtheme-darktext pseudo-class matches in chrome documents when :-moz-lwtheme is true and a lightweight theme with a dark text color is selected.
102	:-moz-submit-invalid	CSS, CSS:Mozilla Extensions, Non-standard, Pseudo-class, Reference
		The :-moz-submit-invalid CSS pseudo-class is a Mozilla extension that represents any submit <button> on forms whose contents aren't valid based on their validation constraints.
103	:-moz-suppressed	CSS, CSS:Mozilla Extensions, NeedsCompatTable, Non-standard, Pseudo-class, Reference
		The :-moz-suppressed CSS pseudo-class is a Mozilla extension that matches elements representing images that were suppressed because loading images from the specified site has been blocked.
104	:-moz-system-metric(images-in-menus)	CSS, NeedsCompatTable, NeedsContent, NeedsExample, Non-standard, Reference
		The :-moz-system-metric(images-in-menus) CSS pseudo-class matches an element if the computer's user interface supports images in menus.
105	:-moz-system-metric(mac-graphite-theme)	CSS, NeedsCompatTable, Non-standard, Reference
		:-moz-system-metric(mac-graphite-theme) will match an element if the user has chosen the "Graphite" appearance in the "Appearance" prefpane of the Mac OS X System Preferences.
106	:-moz-system-metric(scrollbar-end-backward)	CSS, NeedsContent, NeedsExample, Non-standard, Pseudo-class, Reference
		The :-moz-system-metric(scrollbar-end-backward) CSS pseudo-class will match an element if the computer's user interface includes a backward arrow button at the end of scrollbars.
107	:-moz-system-metric(scrollbar-end-forward)	CSS, NeedsContent, NeedsExample, Non-standard, Pseudo-class, Reference
		The :-moz-system-metric(scrollbar-end-forward) CSS pseudo-class will match an element if the computer's user interface includes a forward arrow button at the end of scrollbars.
108	:-moz-system-metric(scrollbar-start-backward)	CSS, NeedsContent, NeedsExample, Non-standard, Pseudo-class, Reference
		The :-moz-system-metric(scrollbar-start-backward) CSS pseudo-class will match an element if the computer's user interface includes a backward arrow button at the start of scrollbars.
109	:-moz-system-metric(scrollbar-start-forward)	CSS, NeedsContent, NeedsExample, Non-standard, Pseudo-class, Reference
		The :-moz-system-metric(scrollbar-start-forward) CSS pseudo-class will match an element if the computer's user interface includes a forward arrow button at the start of scrollbars.
110	:-moz-system-metric(scrollbar-thumb-proportional)	CSS, NeedsContent, NeedsExample, Non-standard, Pseudo-class, Reference
		The :-moz-system-metric(scrollbar-thumb-proportional) CSS pseudo-class will match an element if the computer's user interface uses proportional scrollbar thumbs; that is, the draggable thumb on the scrollbar resizes to indicate the relative size of the visible area of the document.
111	:-moz-system-metric(touch-enabled)	CSS, NeedsContent, NeedsExample, Non-standard, Pseudo-class, Reference
		The :-moz-system-metric(touch-enabled) CSS pseudo-class will match an element if the device on which the content is being rendered offers a supported touch-screen interface.
112	:-moz-system-metric(windows-default-theme)	CSS, Mozilla, Non-standard, Pseudo-class, Reference
		The :-moz-system-metric(windows-default-theme) CSS pseudo-class matches an element if the user is currently using one of the following themes in Windows: Luna, Royale, Zune, or Aero (i.e., Vista Basic, Vista Standard, or Aero Glass). This will exclude Windows Classic themes as well as third-party themes.
113	:-moz-tree-cell	CSS, NeedsCompatTable, NeedsContent, NeedsExample, Non-standard, Reference, XUL
		Activated by the properties attribute.
114	:-moz-tree-cell-text	CSS, NeedsCompatTable, NeedsContent, NeedsExample, Non-standard, Reference, XUL
		Activated by the properties attribute.
115	:-moz-tree-cell-text(hover)	CSS, NeedsCompatTable, NeedsContent, NeedsExample, Non-standard, Pseudo-class, Reference, XUL
		The :-moz-tree-cell-text(hover) CSS pseudo-class will match an element if the mouse cursor is presently hovering over text in a tree cell.
116	:-moz-tree-column	CSS, NeedsCompatTable, NeedsContent, NeedsExample, Non-standard, Reference, XUL
		Activated by the properties attribute.
117	:-moz-tree-drop-feedback	CSS, NeedsCompatTable, NeedsContent, NeedsExample, Non-standard, Pseudo-class, Reference, XUL
		Activated by the properties attribute.
118	:-moz-tree-image	CSS, NeedsCompatTable, NeedsContent, NeedsLiveSample, Non-standard, Reference, XUL
		Activated by the properties attribute.
119	:-moz-tree-indentation	CSS, NeedsCompatTable, NeedsContent, NeedsExample, Non-standard, Reference, XUL
		Activated by the properties attribute.
120	:-moz-tree-line	CSS, Non-standard, Reference, XUL
		Activated by the properties attribute.
121	:-moz-tree-progressmeter	CSS, NeedsCompatTable, NeedsContent, NeedsExample, Non-standard, Reference, XUL
		Activated when the type attribute is set to progressmeter.
122	:-moz-tree-row(hover)	CSS, NeedsCompatTable, NeedsContent, NeedsExample, Non-standard, Pseudo-class, Reference
		The :-moz-tree-row(hover) CSS pseudo-class will match an element if the mouse cursor is presently hovering over a tree row.
123	:-moz-tree-separator	CSS, NeedsCompatTable, NeedsContent, NeedsExample, Non-standard, Reference, XUL
		Activated by the properties attribute.
124	:-moz-tree-twisty	CSS, Non-standard, Reference, XUL
		Activated by the properties attribute.
125	:-moz-ui-invalid	CSS, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-class, Reference
		The :-moz-ui-invalid CSS pseudo-class represents any validated form element whose value isn't valid based on their validation constraints, in certain circumstances. This pseudo-class is applied according to the following rules:
126	:-moz-ui-valid	CSS, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-class, Reference
		The :-moz-ui-valid CSS pseudo-class represents any validated form element whose value validates correctly based on its validation constraints.
127	:-moz-user-disabled	CSS, CSS:Mozilla Extensions, NeedsCompatTable, Non-standard, Pseudo-class, Reference
		The :-moz-user-disabled CSS pseudo-class is a Mozilla extension that matches elements representing images that were not loaded because images have been entirely disabled by the user's preferences.
128	:-moz-window-inactive	CSS, CSS:Mozilla Extensions, Non-standard, Pseudo-class, Reference
		The :-moz-window-inactive CSS pseudo-class is a Mozilla extension that matches any element while it's in an inactive window.
129	:-webkit-autofill	CSS, NeedsExample, Non-standard, Pseudo-class, Reference
		The :-webkit-autofill CSS pseudo-class matches when an <input> element has its value autofilled by the browser.
130	::-moz-color-swatch	CSS, CSS:Mozilla Extensions, Non-standard, Pseudo-element, Reference
		The ::-moz-color-swatch CSS pseudo-element is a Mozilla extension that represents the color selected in an <input> of type="color".
131	::-moz-list-bullet	CSS, CSS:Mozilla Extensions, NeedsCompatTable, Non-standard, Pseudo-element, Reference
		The ::-moz-list-bullet CSS pseudo-element is a Mozilla extension that represents the marker (typically a bullet) of a list item (<li>) in an unordered list (<ul>).
132	::-moz-list-number	CSS, CSS:Mozilla Extensions, NeedsCompatTable, Non-standard, Pseudo-element, Reference
		The ::-moz-list-number CSS pseudo-element is a Mozilla extension that represents the marker (typically a number) of a list item (<li>) in an ordered list (<ol>).
133	::-moz-page	CSS, CSS:Mozilla Extensions, NeedsBrowserCompatibility, NeedsContent, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-element, Reference
		The ::-moz-page CSS pseudo-element is a Mozilla extension that represents an individual page when printed or in a print preview.
134	::-moz-page-sequence	CSS, CSS:Mozilla Extensions, NeedsBrowserCompatibility, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-element, Reference
		The ::-moz-page-sequence CSS pseudo-element is a Mozilla extension that represents the background of a print preview.
135	::-moz-progress-bar	CSS, CSS:Mozilla Extensions, NeedsCompatTable, Non-standard, Pseudo-element, Reference
		The ::-moz-progress-bar CSS pseudo-element is a Mozilla extension that represents the progress bar inside a <progress> element. (The bar represents the amount of progress that has been made.)
136	::-moz-range-progress	CSS, CSS:Mozilla Extensions, Non-standard, Pseudo-element, Reference
		The ::-moz-range-progress CSS pseudo-element is a Mozilla extension that represents the lower portion of the track (i.e., groove) in which the indicator slides in an <input> of type="range". This portion corresponds to values lower than the value currently selected by the thumb (i.e., virtual knob).
137	::-moz-range-thumb	CSS, CSS:Mozilla Extensions, Non-standard, Pseudo-element, Reference
		The ::-moz-range-thumb CSS pseudo-element is a Mozilla extension that represents the thumb (i.e., virtual knob) of an <input> of type="range". The user can move the thumb along the input's track to alter its numerical value.
138	::-moz-range-track	CSS, CSS:Mozilla Extensions, Non-standard, Pseudo-element, Reference
		The ::-moz-range-track CSS pseudo-element is a Mozilla extension that represents the track (i.e., groove) in which the indicator slides in an <input> of type="range".
139	::-moz-scrolled-page-sequence	CSS, CSS:Mozilla Extensions, NeedsBrowserCompatibility, NeedsContent, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-element, Reference
		The ::-moz-scrolled-page-sequence CSS pseudo-element is a Mozilla extension that represents the background of a print preview.
140	::-moz-tree-row	CSS, Non-standard, Pseudo-element, Reference, XUL
		The ::-moz-tree-row CSS pseudo-element is used to select rows and apply styles to tree rows.
141	::-ms-browse	CSS, Non-standard, Pseudo-element, Reference
		The ::-ms-browse CSS pseudo-element is a Microsoft extension that represents the button that opens the file picker of <input type="file">.
142	::-ms-check	CSS, Non-standard, Pseudo-element, Reference
		The ::-ms-check CSS pseudo-element is a Microsoft extension that represents  checkboxes and radio button groups created by <input type="checkbox"> and <input type="radio">.
143	::-ms-clear	CSS, Non-standard, Pseudo-element, Reference
		The ::-ms-clear CSS pseudo-element creates a clear button at the edge of an <input type="text"> text control that clears the current value. This pseudo-element is non-standard, supported only in Internet Explorer 10, Internet Explorer 11, and Microsoft Edge. The clear button is only shown on focused, non-empty text controls.
144	::-ms-expand	CSS, Non-standard, Pseudo-element, Reference
		The ::-ms-expand CSS pseudo-element is a Microsoft extension that represents the button of a <select> menu control that opens or closes the drop-down menu. Typically it is a triangle that points downward.
145	::-ms-fill	CSS, Non-standard, Pseudo-element, Reference
		The ::-ms-fill CSS pseudo-element is a Microsoft extension that represents a progress bar displayed by <progress>.
146	::-ms-fill-lower	CSS, NeedsBrowserCompatibility, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-element, Reference
		The ::-ms-fill-lower CSS pseudo-element represents the lower portion of the track of a slider control; that is, the portion corresponding to values less than the value currently selected by the thumb. A slider control is one possible representation of <input type="range">.
147	::-ms-fill-upper	CSS, NeedsBrowserCompatibility, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-element, Reference
		The ::-ms-fill-upper CSS pseudo-element is a Microsoft extension that represents the upper portion of the track of a slider control; that is, the portion corresponding to values greater than the value currently selected by the thumb. A slider control is one possible representation of <input type="range">.
148	::-ms-reveal	CSS, NeedsContent, NeedsExample, Non-standard, Pseudo-element, Reference
		The ::-ms-reveal CSS pseudo-element is a Microsoft extension that is used to display a password reveal button for use with a password field created by <input type="password">. The user presses the button to reveal the actual field value rather than asterisks.
149	::-ms-thumb	CSS, NeedsBrowserCompatibility, NeedsCompatTable, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-element, Reference
		The ::-ms-thumb CSS pseudo-element is a Microsoft extension that represents the thumb that the user moves within the track of a slider control to alter its numerical value. A slider control is one possible representation of <input type="range">.
150	::-ms-ticks-after	CSS, Non-standard, Pseudo-element, Reference
		The ::-ms-ticks-after CSS pseudo-element is a Microsoft extension that applies one or more styles to the tick marks that appear after the track of a slider control. A slider control is one possible representation of <input type="range">.
151	::-ms-ticks-before	CSS, Non-standard, Pseudo-element, Reference
		The ::-ms-ticks-before CSS pseudo-element is a Microsoft extension that applies one or more styles to the tick marks that appear before the track of a slider control. A slider control is one possible representation of <input type="range">.
152	::-ms-tooltip	CSS, Non-standard, Pseudo-element, Reference
		The ::-ms-tooltip CSS pseudo-element is a Microsoft extension that represents the tooltip of a slider control. A slider control is one possible representation of <input type="range">.
153	::-ms-track	CSS, NeedsBrowserCompatibility, NeedsCompatTable, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-element, Reference
		The ::-ms-track CSS pseudo-element is a Microsoft extension that represents the track of a slider control. A slider control is one possible representation of <input type="range">.
154	::-ms-value	CSS, Non-standard, Pseudo-element, Reference
		The ::-ms-value CSS pseudo-element is a Microsoft extension that applies rules to the value of a text or password <input> control or the content of a <select> control.
155	::-webkit-file-upload-button	CSS, Non-standard, Pseudo-element, Reference
		The ::-webkit-file-upload-button CSS pseudo-element represents the button of an <input> of  type="file".
156	::-webkit-inner-spin-button	CSS, NeedsBrowserCompatibility, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-element, Reference
		The ::-webkit-inner-spin-button CSS pseudo-element is used to style the inner part of the spinner button of number picker input elements.
157	::-webkit-meter-bar	-webkit-meter-bar, CSS, Non-standard, Pseudo-element, Reference, WebKit
		The ::-webkit-meter-bar CSS pseudo-class is a WebKit extension that represents the meter bar in a <meter> element.
158	::-webkit-meter-even-less-good-value	-webkit-meter-even-less-good-value, CSS, Non-standard, Pseudo-element, Reference
		The ::-webkit-meter-even-less-good-value gives a red color to a <meter> element when the value and the optimum attributes fall outside the low-high range, but in opposite zones. To illustrate, it applies when value < low < high < optimum or value > high > low > optimum.
159	::-webkit-meter-inner-element	-webkit-meter-inner-element, CSS, Non-standard, Pseudo-element, Reference
		::-webkit-meter-inner-element is a proprietary WebKit CSS pseudo-element for selecting and applying styles to to the outer containing element of a <meter> element. Additional markup to render the meter element as read-only.
160	::-webkit-meter-optimum-value	::-webkit-meter-optimum-value, CSS, Non-standard, Pseudo-element, Reference
		The ::-webkit-meter-optimum-value CSS pseudo-element styles the <meter> element when its value is inside the low-high range.
161	::-webkit-meter-suboptimum-value	-webkit-meter-suboptimum-value, CSS, Non-standard, Pseudo-element, Reference
		The ::-webkit-meter-suboptimum-value pseudo-element gives a yellow color to the <meter> element when the value attribute falls outside of the low-high range.
162	::-webkit-outer-spin-button	CSS, NeedsBrowserCompatibility, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-element, Reference
		The ::-webkit-outer-spin-button CSS pseudo-element is used to style the outer part of the spinner button of number picker <input> elements.
163	::-webkit-progress-bar	CSS, Non-standard, Pseudo-element, Reference
		The ::-webkit-progress-bar CSS pseudo-element represents the entire bar of a <progress> element. Normally it's only visible as the unfilled portion of the bar, since by default it's rendered below the ::-webkit-progress-value pseudo-element. It is a child of the ::-webkit-progress-inner-element pseudo-element and the parent of the ::-webkit-progress-value pseudo-element.
164	::-webkit-progress-inner-element	CSS, Non-standard, Pseudo-element, Reference
		The ::-webkit-progress-inner-element CSS pseudo-element represents the outermost container of the <progress> element. It is the parent of the ::-webkit-progress-bar pseudo-element.
165	::-webkit-progress-value	CSS, Non-standard, Pseudo-element, Reference
		The ::-webkit-progress-value CSS pseudo-element represents the filled-in portion of the bar of a <progress> element. It is a child of the ::-webkit-progress-bar pseudo-element.
166	::-webkit-scrollbar	CSS, NeedsCompatTable, Pseudo-element, Reference
		The ::-webkit-scrollbar CSS pseudo-element affects the style of the scrollbar of an element.
167	::-webkit-search-cancel-button	CSS, NeedsExample, Non-standard, Pseudo-element, Reference
		The ::-webkit-search-cancel-button CSS pseudo-element represents a button (the "cancel button") at the edge of an <input> of type="search" which clears away the current value of the <input> element. This button and pseudo-element are non-standard, supported only in WebKit and Blink, hence the vendor prefix. The clear button is only shown on non-empty search <input> elements.
168	::-webkit-search-results-button	CSS, NeedsExample, Non-standard, Pseudo-element, Reference
		The ::-webkit-search-results-button CSS pseudo-element represents a button (the "search results button") at the left edge of an <input> of type="search" which when clicked displays a menu which allows the user to choose from previous recent search queries. This button and pseudo-element are non-standard, supported only in WebKit and Blink, hence the vendor prefix. The search results button is only shown on search <input> elements that have a results attribute.
169	::-webkit-slider-runnable-track	CSS, NeedsBrowserCompatibility, NeedsCompatTable, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-element, Reference
		The ::-webkit-slider-runnable-track CSS pseudo-element represents the "track" (the groove in which the indicator slides) of an <input> of type="range".
170	::-webkit-slider-thumb	CSS, NeedsBrowserCompatibility, NeedsCompatTable, NeedsExample, NeedsMobileBrowserCompatibility, Non-standard, Pseudo-element, Reference
		The ::-webkit-slider-thumb CSS pseudo-element represents the "thumb" that the user can move within the "groove" of an <input> of type="range" to alter its numerical value.
171	::after (:after)	CSS, Layout, Pseudo-element, Reference, Web
		In CSS, ::after creates a pseudo-element that is the last child of the selected element. It is often used to add cosmetic content to an element with the content property.
172	::backdrop	CSS, Experimental, Full-screen, Layout, NeedsContent, Pseudo-element, Reference
		The ::backdrop CSS pseudo-element is a box rendered immediately below any element rendered in fullscreen mode (and above any lower elements in the stack).
173	::before (:before)	CSS, Layout, Pseudo-element, Reference, Web
		In CSS, ::before creates a pseudo-element that is the first child of the selected element. It is often used to add cosmetic content to an element with the content property.
174	::cue (:cue)	::cue, CSS, Media, Pseudo-element, Reference, Web Video Text Tracks, WebVTT, cue
		The ::cue CSS pseudo-element matches WebVTT cues within a selected element. This can be used to style captions and other cues in media with VTT tracks.
175	::first-letter (:first-letter)	CSS, Layout, Pseudo-element, Reference
		The ::first-letter CSS pseudo-element applies styles to the first letter of the first line of a block-level element, but only when not preceded by other content (such as images or inline tables).
176	::first-line (:first-line)	CSS, Layout, Pseudo-element, Reference
		The ::first-line CSS pseudo-element applies styles to the first line of a block-level element.
177	::grammar-error	CSS, Experimental, NeedsExample, Pseudo-element, Reference
		The ::grammar-error CSS pseudo-element represents a text segment which the user agent has flagged as grammatically incorrect.
178	::marker	CSS, CSS Lists, Experimental, Layout, Pseudo-element, Reference
		The ::marker CSS pseudo-element selects the marker box of a list item, which typically contains a bullet or number.
179	::placeholder	CSS, Experimental, Pseudo-element, Reference
		The ::placeholder CSS pseudo-element represents the placeholder text of a form element.
180	::selection	CSS, Layout, Pseudo-element, Reference
		The ::selection CSS pseudo-element applies styles to the part of a document that has been highlighted by the user (such as clicking and dragging the mouse across text).
181	::slotted()	::slotted, CSS, Layout, Pseudo-element, Reference, Web
		The :slotted() CSS pseudo-element represents any element that has been placed into a slot inside an HTML template (see Using templates and slots for more information).
182	::spelling-error	CSS, Experimental, NeedsExample, Pseudo-element, Reference, Web
		The ::spelling-error CSS pseudo-element represents a text segment which the user agent has flagged as incorrectly spelled.
183	:active	CSS, Layout, Pseudo-class, Reference, Web
		The :active CSS pseudo-class represents an element (such as a button) that is being activated by the user.
184	:any-link	CSS, Experimental, Layout, Pseudo-class, Reference, Web
		The :any-link CSS pseudo-class selector represents an element that acts as the source anchor of a hyperlink, independent of whether it has been visited. In other words, it matches every <a>, <area>, or <link> element that has an href attribute. Thus, it matches all elements that match :link or :visited.
185	:blank	:blank, CSS, CSS Selectors, Experimental, Pseudo-class, Reference
		The :blank CSS pseudo-class matches elements that have no child nodes at all, or only have empty text nodes or text nodes that have only whitespace in them.
186	:checked	CSS, Layout, Pseudo-class, Reference, Web
		The :checked CSS pseudo-class selector represents any radio (<input type="radio">), checkbox (<input type="checkbox">), or option (<option> in a <select>) element that is checked or toggled to an on state.
187	:default	CSS, Layout, Pseudo-class, Reference, Web
		The :default CSS pseudo-class represents any form element that is the default among a group of related elements.
188	:defined	CSS, Layout, Pseudo-class, Reference, Web
		The :defined CSS pseudo-class represents any element that has been defined. This includes any standard element built in to the browser, and custom elements that have been successfully defined (i.e. with the CustomElementRegistry.define() method).
189	:dir()	BiDi, CSS, Experimental, Pseudo-class, Reference
		The :dir() CSS pseudo-class matches elements based on the directionality of the text contained in them.
190	:disabled	CSS, Layout, Pseudo-class, Reference, Web
		The :disabled CSS pseudo-class represents any disabled element. An element is disabled if it can't be activated (selected, clicked on, typed into, etc.) or accept focus. The element also has an enabled state, in which it can be activated or accept focus.
191	:empty	CSS, Layout, Pseudo-class, Reference, Web
		The :empty CSS pseudo-class represents any element that has no children. Children can be either element nodes or text (including whitespace). Comments or processing instructions do not affect whether an element is considered empty.
192	:enabled	CSS, Layout, Pseudo-class, Reference, Web
		The :enabled CSS pseudo-class represents any enabled element. An element is enabled if it can be activated (selected, clicked on, typed into, etc.) or accept focus. The element also has a disabled state, in which it can't be activated or accept focus.
193	:first	@page, CSS, Layout, Pseudo-class, Reference, Web
		The :first CSS pseudo-class, used with the  @page at-rule, represents the first page of a printed document.
194	:first-child	CSS, Layout, Pseudo-class, Reference, Web
		The :first-child CSS pseudo-class represents the first element among a group of sibling elements.
195	:first-of-type	CSS, Layout, Pseudo-class, Reference, Web
		The :first-of-type CSS pseudo-class represents the first element of its type among a group of sibling elements.
196	:focus	CSS, Layout, Pseudo-class, Reference, Web
		The :focus CSS pseudo-class represents an element (such as a form input) that has received focus. It is generally triggered when the user clicks or taps on an element or selects it with the keyboard's "tab" key.
197	:focus-visible	CSS, Layout, Pseudo-class, Reference, Web
		The :focus-visible pseudo-class applies while an element matches the :focus pseudo-class and the UA determines via heuristics that the focus should be made evident on the element. (Many browsers show a “focus ring” by default in this case.)
198	:focus-within	CSS, Layout, Pseudo-class, Reference, Web
		The :focus-within CSS pseudo-class represents an element that has received focus or contains an element that has received focus. In other words, it represents an element that is itself matched by the :focus pseudo-class or has a descendant that is matched by :focus. (This includes descendants in shadow trees.)
199	:fullscreen	CSS, Experimental, Full-screen, Pseudo-class, Reference
		The :fullscreen CSS pseudo-class represents an element that's displayed when the browser is in fullscreen mode.
200	:has()	CSS, Experimental, Pseudo-class, Reference, Selectors
		The :has() CSS pseudo-class represents an element if any of the selectors passed as parameters (relative to the :scope of the given element), match at least one element.
201	:host	:host, CSS, DOM, Layout, Pseudo-class, Reference, Web, Web Components, shadow, shadow dom
		The :host CSS pseudo-class selects the shadow host of the shadow DOM containing the CSS it is used inside — in other words, this allows you select a custom element from inside its shadow DOM.
202	:host()	:host(), CSS, Layout, Pseudo-class, Reference, Web
		The :host() CSS pseudo-class function selects the shadow host of the shadow DOM containing the CSS it is used inside (so you can select a custom element from inside its shadow DOM) — but only if the selector given as the function's parameter matches the shadow host.
203	:host-context()	:host-context(), CSS, Experimental, Layout, Pseudo-class, Reference, Web
		The :host-context() CSS pseudo-class function selects the shadow host of the shadow DOM containing the CSS it is used inside (so you can select a custom element from inside its shadow DOM) — but only if the selector given as the function's parameter matches the shadow host's ancestor(s) in the place it sits inside the DOM hierarchy.
204	:hover	CSS, Layout, Pseudo-class, Reference, Web
		The :hover CSS pseudo-class matches when the user interacts with an element with a pointing device, but does not necessarily activate it. It is generally triggered when the user hovers over an element with the cursor (mouse pointer).
205	:in-range	CSS, Pseudo-class, Reference, Web
		The :in-range CSS pseudo-class represents an <input> element whose current value is within the range limits specified by the min and max attributes.
206	:indeterminate	CSS, Layout, Pseudo-class, Reference, Web
		The :indeterminate CSS pseudo-class represents any form element whose state is indeterminate.
207	:invalid	CSS, Layout, Pseudo-class, Reference, Web
		The :invalid CSS pseudo-class represents any <input> or other <form> element whose contents fail to validate.
208	:lang()	CSS, Layout, Pseudo-class, Reference, Web
		The :lang() CSS pseudo-class matches elements based on the language they are determined to be in.
209	:last-child	CSS, Layout, Pseudo-class, Reference, Web
		The :last-child CSS pseudo-class represents the last element among a group of sibling elements.
210	:last-of-type	CSS, Layout, Pseudo-class, Reference, Web
		The :last-of-type CSS pseudo-class represents the last element of its type among a group of sibling elements.
211	:left	@page, CSS, Layout, Pseudo-class, Reference, Web
		The :left CSS pseudo-class, used with the @page at-rule, represents all left-hand pages of a printed document.
212	:link	CSS, Layout, Pseudo-class, Reference, Web
		The :link CSS pseudo-class represents an element that has not yet been visited. It matches every unvisited <a>, <area>, or <link> element that has an href attribute.
213	:matches() (:any())	:matches, CSS, Pseudo-class, Reference, Web
		The :matches() CSS pseudo-class function takes a selector list as its argument, and selects any element that can be selected by one of the selectors in that list. This is useful for writing large selectors in a more compact form.
214	:not()	CSS, Layout, Pseudo-class, Reference, Web
		The :not() CSS pseudo-class represents elements that do not match a list of selectors. Since it prevents specific items from being selected, it is known as the negation pseudo-class.
215	:nth-child()	CSS, Layout, Pseudo-class, Reference, Web
		The :nth-child() CSS pseudo-class matches elements based on their position in a group of siblings.
216	:nth-last-child()	CSS, Layout, Pseudo-class, Reference, Web
		The :nth-last-child() CSS pseudo-class matches elements based on their position among a group of siblings, counting from the end.
217	:nth-last-of-type()	CSS, Layout, Pseudo-class, Reference, Web
		The :nth-last-of-type() CSS pseudo-class matches elements of a given type, based on their position among a group of siblings, counting from the end.
218	:nth-of-type()	CSS, Layout, Pseudo-class, Reference, Web
		The :nth-of-type() CSS pseudo-class matches elements of a given type, based on their position among a group of siblings.
219	:only-child	CSS, Layout, Pseudo-class, Reference, Web
		The :only-child CSS pseudo-class represents an element without any siblings. This is the same as :first-child:last-child or :nth-child(1):nth-last-child(1), but with a lower specificity.
220	:only-of-type	CSS, Layout, Pseudo-class, Reference, Web
		The :only-of-type CSS pseudo-class represents an element that has no siblings of the same type.
221	:optional	CSS, Layout, Pseudo-class, Reference, Web
		The :optional CSS pseudo-class represents any <input>, <select>, or <textarea> element that does not have the required attribute set on it.
222	:out-of-range	CSS, Layout, Pseudo-class, Reference
		The :out-of-range CSS pseudo-class represents an <input> element whose current value is outside the range limits specified by the min and max attributes.
223	:placeholder-shown	CSS, Experimental, Pseudo-class, Reference
		The :placeholder-shown CSS pseudo-class represents any <input> or <textarea> element that is currently displaying placeholder text.
224	:read-only	CSS, Layout, Pseudo-class, Reference, Web
		The :read-only CSS pseudo-class represents an element (such as a locked text input) that is not editable by the user.
225	:read-write	CSS, Layout, Pseudo-class, Reference, Web
		The :read-write CSS pseudo-class represents an element (such as a text input) that is editable by the user.
226	:required	CSS, Layout, Pseudo-class, Reference, Web
		The :required CSS pseudo-class represents any <input>, <select>, or <textarea> element that has the required attribute set on it.
227	:right	@page, CSS, Layout, Pseudo-class, Reference, Web
		The :right CSS pseudo-class, used with the @page at-rule, represents all right-hand pages of a printed document.
228	:root	CSS, Layout, Pseudo-class, Reference, Web
		The :root CSS pseudo-class matches the root element of a tree representing the document. In HTML, :root represents the <html> element and is identical to the selector html, except that its specificity is higher.
229	:scope	:scope, CSS, Layout, Pseudo-class, Reference, Scoped Elements, Web
		The :scope CSS pseudo-class represents elements that are a reference point for selectors to match against.
230	:target	CSS, Layout, Pseudo-class, Reference, Web
		The :target CSS pseudo-class represents a unique element (the target element) with an id matching the URL's fragment.
231	:valid	CSS, Layout, Pseudo-class, Reference, Web
		The :valid CSS pseudo-class represents any <input> or other <form> element whose contents validate successfully. This allows to easily make valid fields adopt an appearance that helps the user confirm that their data is formatted properly.
232	:visited	CSS, Layout, Pseudo-class, Reference, Web
		The :visited CSS pseudo-class represents links that the user has already visited. For privacy reasons, the styles that can be modified using this selector are very limited.
233	&lt;angle&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <angle> CSS data type represents an angle value expressed in degrees, gradians, radians, or turns. It is used, for example, in <gradient>s and in some transform functions.
234	&lt;basic-shape&gt;	CSS, CSS Data Type, CSS Shapes, Reference
		The <basic-shape> CSS data type represents a shape used in the clip-path, shape-outside, and offset-path properties.
235	&lt;blend-mode&gt;	Blend modes, CSS, CSS Data Type, Compositing, Compositing and Blending, Reference
		The <blend-mode> CSS data type describes how colors should appear when elements overlap. It is used in the background-blend-mode and mix-blend-mode properties.
236	&lt;color&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <color> CSS data type represents a color in the sRGB color space. A <color> may also include an alpha-channel transparency value, indicating how the color should composite with its background.
237	&lt;custom-ident&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <custom-ident> CSS data type denotes an arbitrary user-defined string used as an identifier. It is case-sensitive, and certain values are forbidden in various contexts to prevent ambiguity.
238	&lt;display-box&gt;	CSS, CSS Data Type, CSS Display, Reference, display-box
		These keywords define whether an element generates display boxes at all.
239	&lt;display-inside&gt;	CSS, CSS Display, Reference, display-inside
		These keywords specify the element’s inner display type, which defines the type of formatting context that lays out its contents (assuming it is a non-replaced element). These keywords are used as values of the display property, and can be used for legacy purposes as a single keyword, or as defined in the Level 3 specification alongside a value from the <display-outside> keywords.
240	&lt;display-internal&gt;	CSS, CSS Data Type, CSS Display, Reference, display-internal
		Some layout models such as table and ruby have a complex internal structure, with several different roles that their children and descendants can fill. This page defines those "internal" display values, which only have meaning within that particular layout mode.
241	&lt;display-legacy&gt;	CSS, CSS Data Type, CSS Display, Reference, display-legacy
		CSS 2 used a single-keyword syntax for the display property, requiring separate keywords for block-level and inline-level variants of the same layout mode. This page details those values.
242	&lt;display-listitem&gt;	CSS, CSS Data Type, CSS Display, Reference, list-item
		The list-item keyword causes the element to generate a ::marker pseudo-element with the content specified by its list-style properties (for example a bullet point) together with a principal box of the specified type for its own contents.
243	&lt;display-outside&gt;	CSS, CSS Data Type, CSS Display, Reference, display-outside
		The <display-outside> keywords specify the element’s outer display type, which is essentially its role in flow layout. These keywords are used as values of the display property, and can be used for legacy purposes as a single keyword, or as defined in the Level 3 specification alongside a value from the <display-inside> keywords.
244	&lt;filter-function&gt;	CSS, CSS Data Type, Filter Effects, NeedsCompatTable, Reference
		The <filter-function> CSS data type represents a graphical effect that can change the appearance of an input image. It is used in the filter and backdrop-filter properties.
245	blur()	CSS, CSS Function, Filter Effects, Reference
		The blur() CSS function applies a Gaussian blur to the input image. Its result is a <filter-function>.
246	brightness()	CSS, CSS Function, Filter Effects, Reference
		The brightness() CSS function applies a linear multiplier to the input image, making it appear brighter or darker. Its result is a <filter-function>.
247	contrast()	CSS, CSS Function, Filter Effects, Reference
		The contrast() CSS function adjusts the contrast of the input image. Its result is a <filter-function>.
248	drop-shadow()	CSS, CSS Function, Filter Effects, Reference
		The drop-shadow() CSS function applies a drop shadow effect to the input image. Its result is a <filter-function>.
249	grayscale()	CSS, CSS Function, Filter Effects, Reference
		The grayscale() CSS function converts the input image to grayscale. Its result is a <filter-function>.
250	hue-rotate()	CSS, CSS Function, Filter Effects, Reference
		The hue-rotate() CSS function rotates the hue of an element and its contents. Its result is a <filter-function>.
251	invert()	CSS, CSS Function, Filter Effects, Reference
		The invert() CSS function inverts the color samples in the input image. Its result is a <filter-function>.
252	opacity()	CSS, CSS Function, Filter Effects, Reference
		The opacity() CSS function applies transparency to the samples in the input image. Its result is a <filter-function>.
253	saturate()	CSS, CSS Function, Filter Effects, Reference
		The saturate() CSS function super-saturates or desaturates the input image. Its result is a <filter-function>.
254	sepia()	CSS, CSS Function, Filter Effects, Reference
		The sepia() CSS function converts the input image to sepia, giving it a warmer, more yellow/brown appearance. Its result is a <filter-function>.
255	url()	CSS, Junk, Reference
		The url() CSS function uses an SVG filter to change the appearance on the input image.
256	&lt;flex&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <flex> CSS data type denotes a flexible length within a grid container. It is used in grid-template-columns, grid-template-rows and other related properties.
257	&lt;frequency&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <frequency> CSS data type represents a frequency dimension, such as the pitch of a speaking voice. It is not currently used in any CSS properties.
258	&lt;gradient&gt;	CSS, CSS Data Type, CSS Images, Graphics, Layout, Reference
		The <gradient> CSS data type is a special type of <image> that consists of a progressive transition between two or more colors.
259	&lt;image&gt;	CSS, CSS Data Type, CSS Images, Graphics, Layout, Reference, Web
		The <image> CSS data type represents a two-dimensional image. There are two kinds of images: plain images, referenced with a <url>, and dynamically-generated images, generated with <gradient> or element(). Images can be used with numerous CSS properties, such as background-image, border-image, content, cursor, and list-style-image.
260	&lt;integer&gt;	CSS, CSS Data Type, Reference, Web
		The <integer> CSS data type is a special type of <number> that represents a whole number, whether positive or negative. Integers can be used in numerous CSS properties, such as column-count, counter-increment, grid-column, grid-row, and z-index.
261	&lt;length&gt;	CSS, CSS Data Type, Layout, Reference, Web, length
		The <length> CSS data type represents a distance value. Lengths can be used in numerous CSS properties, such as width, height, margin, padding, border-width, font-size, and text-shadow.
262	&lt;number&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <number> CSS data type represents a number, being either an integer or a number with a fractional component.
263	&lt;percentage&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <percentage> CSS data type represents a percentage value. It is often used to define a size as relative to an element's parent object. Numerous properties can use percentages, such as width, height, margin, padding, and font-size.
264	&lt;position&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <position> CSS data type denotes a two-dimensional coordinate used to set a location relative to an element box. It is used in the background-position property.
265	&lt;ratio&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <ratio> CSS data type, used for describing aspect ratios in media queries, denotes the proportion between two unitless values.
266	&lt;resolution&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <resolution> CSS data type, used for describing resolutions in media queries, denotes the pixel density of an output device, i.e., its resolution.
267	&lt;shape&gt;	CSS, CSS Data Type, CSS Function, Deprecated, Layout, Reference, Web
		The <shape> CSS data type defines the specific form (shape) of a region. The region represents the part of an element to which the clip property applies.
268	&lt;single-transition-timing-function&gt;	CSS, CSS Animations, CSS Data Type, CSS Transitions, Layout, Reference
		The <single-transition-timing-function> CSS data type denotes a mathematical function that describes how fast one-dimensional values change during animations. This lets you vary the animation's speed over the course of its duration.
269	&lt;string&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <string> CSS data type represents a sequence of characters. Strings are used in numerous CSS properties, such as content, font-family, and quotes.
270	&lt;time&gt;	CSS, CSS Data Type, Layout, Reference, Web
		The <time> CSS data type represents a time value expressed in seconds or milliseconds. It is used in animation, transition, and related properties.
271	&lt;transform-function&gt;	CSS, CSS Data Type, CSS Transforms, Layout, Reference
		The <transform-function> CSS data type represents a transformation that affects an element's appearance. Transformation functions can rotate, resize, distort, or move an element in 2D or 3D space. It is used in the transform property.
272	matrix()	CSS, CSS Function, CSS Transforms, Reference
		The matrix() CSS function defines a homogeneous 2D transformation matrix. Its result is a <transform-function> data type.
273	matrix3d()	CSS, CSS Function, CSS Transforms, NeedsExample, Reference
		The matrix3d() CSS function defines a 3D transformation as a 4x4 homogeneous matrix. Its result is a <transform-function> data type.
274	perspective()	CSS, CSS Function, CSS Transforms, Reference
		The perspective() CSS function defines a transformation that sets the distance between the user and the z=0 plane. Its result is a <transform-function> data type.
275	rotate()	CSS, CSS Function, CSS Transforms, Reference
		The rotate() CSS function defines a transformation that rotates an element around a fixed point on the 2D plane, without deforming it. Its result is a <transform-function> data type.
276	rotate3d()	CSS, CSS Function, CSS Transforms, Reference
		The rotate3d() CSS function defines a transformation that rotates an element around a fixed axis in 3D space, without deforming it. Its result is a <transform-function> data type.
277	rotateX()	CSS, CSS Function, CSS Transforms, Reference
		The rotateX() CSS function defines a transformation that rotates an element around the abscissa (horizontal axis) without deforming it. Its result is a <transform-function> data type.
278	rotateY()	CSS, CSS Function, CSS Transforms, Reference
		The rotateY() CSS function defines a transformation that rotates an element around the ordinate (vertical axis) without deforming it. Its result is a <transform-function> data type.
279	rotateZ()	CSS, CSS Function, CSS Transforms, Reference
		The rotateZ() CSS function defines a transformation that rotates an element around the z-axis without deforming it. Its result is a <transform-function> data type.
280	scale()	CSS, CSS Function, CSS Transforms, Reference
		The scale() CSS function defines a transformation that resizes an element on the 2D plane. Because the amount of scaling is defined by a vector, it can resize the horizontal and vertical dimensions at different scales. Its result is a <transform-function> data type.
281	scale3d()	CSS, CSS Function, CSS Transforms, Reference
		The scale3d() CSS function defines a transformation that resizes an element in 3D space. Because the amount of scaling is defined by a vector, it can resize different dimensions at different scales. Its result is a <transform-function> data type.
282	scaleX()	CSS, CSS Function, CSS Transforms, Reference
		The scaleX() CSS function defines a transformation that resizes an element along the x-axis (horizontally). Its result is a <transform-function> data type.
283	scaleY()	CSS, CSS Function, CSS Transforms, Reference, transform: rotateX(180deg);, transform: scaleY(-1);
		The scaleY() CSS function defines a transformation that resizes an element along the y-axis (vertically). Its result is a <transform-function> data type.
284	scaleZ()	CSS, CSS Function, CSS Transforms, Reference
		The scaleZ() CSS function defines a transformation that resizes an element along the z-axis. Its result is a <transform-function> data type.
285	skew()	CSS, CSS Function, CSS Transforms, Reference
		The skew() CSS function defines a transformation that skews an element on the 2D plane. Its result is a <transform-function> data type.
286	skewX()	CSS, CSS Function, CSS Transforms, Reference
		The skewX() CSS function defines a transformation that skews an element in the horizontal direction on the 2D plane. Its result is a <transform-function> data type.
287	skewY()	CSS, CSS Function, CSS Transforms, Reference
		The skewY() CSS function defines a transformation that skews an element in the vertical direction on the 2D plane. Its result is a <transform-function> data type.
288	translate()	CSS, CSS Function, CSS Transforms, Reference
		The translate() CSS function repositions an element in the horizontal and/or vertical directions. Its result is a <transform-function> data type.
289	translate3d()	CSS, CSS Function, CSS Transforms, Reference
		The translate3d() CSS function repositions an element in 3D space. Its result is a <transform-function> data type.
290	translateX()	CSS, CSS Function, CSS Transforms, Reference
		The translateX() CSS function repositions an element horizontally on the 2D plane. Its result is a <transform-function> data type.
291	translateY()	CSS, CSS Function, CSS Transforms, Reference
		The translateY() CSS function repositions an element vertically on the 2D plane. Its result is a <transform-function> data type.
292	translateZ()	3D, CSS, CSS Function, CSS Transforms, Reference
		The translateZ() CSS function repositions an element along the z-axis in 3D space, i.e., closer to or farther away from the viewer. Its result is a <transform-function> data type.
293	&lt;translation-value&gt;	CSS, CSS Data Type, CSS Transforms, Reference
		The <translation-value> CSS data type is used in the arguments for certain transform functions, including translate(), translateX(), translateY(), and translate3d().
294	&lt;url&gt;	CSS, CSS Data Type, Layout, Reference, URI, URL, urn
		The <url> CSS data type denotes a pointer to a resource, such as an image or a font. URLs can be used in numerous CSS properties, such as background-image, cursor, and list-style.
295	@charset	At-rule, CSS, Layout, Reference, Web
		The @charset CSS at-rule specifies the character encoding used in the style sheet. It must be the first element in the style sheet and not be preceded by any character; as it is not a nested statement, it cannot be used inside conditional group at-rules. If several @charset at-rules are defined, only the first one is used, and it cannot be used inside a style attribute on an HTML element or inside the <style> element where the character set of the HTML page is relevant.
296	@counter-style	At-rule, CSS, Reference, counter
		The @counter-style CSS at-rule lets you define counter styles that are not part of the predefined set of styles. A @counter-style rule defines how to convert a counter value into a string representation.
297	additive-symbols	@counter-style, CSS, CSS Counter Styles, CSS Descriptor, Reference
		The additive-symbols descriptor lets you specify symbols when the value of a counter system descriptor is additive. The additive-symbols descriptor defines additive tuples, each of which is a pair containing a symbol and a non-negative integer weight. The additive system is used to construct sign-value numbering systems such as Roman numerals.
298	fallback	@counter-style, CSS, CSS Counter Styles, CSS Descriptor, Reference
		The fallback descriptor can be used to specify a counter style to fall back to if the current counter style cannot create a marker representation for a particular counter value.
299	negative	@counter-style, CSS, CSS Descriptor, Reference
		When defining custom counter styles, the negative descriptor lets you alter the representations of negative counter values, by providing a way to specify symbols to be appended or prepended to the counter representation when the value is negative.
300	pad	@counter-style, CSS, CSS Counter Styles, CSS Descriptor, Reference
		The pad descriptor can be used with custom counter style definitions when you need the marker representations to have a minimum length. If a marker representation is smaller than the specified pad length, then the marker will be padded with the specified pad symbol. Marker representations longer than the pad length are constructed as normal.
301	prefix	@counter-style, CSS, CSS Counter Styles, CSS Descriptor, Reference
		The prefix descriptor of the @counter-style rule specifies content that will be prepended to the marker representation. If not specified, the default value will be "" (an empty string).
302	range	@counter-style, CSS, CSS Counter Styles, CSS Descriptor, Reference
		When defining custom counter styles, the range descriptor lets the author specify a range of counter values over which the style is applied. If a counter value is outside the specified range, then the fallback style will be used to construct the representation of that marker.
303	speak-as	@counter-style, CSS, CSS Descriptor, Reference
		The speak-as descriptor specifies how a counter symbol constructed with a given @counter-style will be represented in the spoken form. For example, an author can specify a counter symbol to be either spoken as its numerical value or just represented with an audio cue.
304	suffix	@counter-style, CSS, CSS Counter Styles, CSS Descriptor, Reference
		The suffix descriptor of the@counter-style rule specifies content that will be appended to the marker representation. If not specified, the default value will be "\2E\20" (". ", a full stop followed by a space).
305	symbols	@counter-style, CSS, CSS Counter Styles, CSS Descriptor, Reference
		The symbols CSS descriptor is used to specify the symbols that the specified counter system will use to construct counter representations. A symbol can be a string, image, or identifier. It is used within the @counter-style at-rule.
306	system	@counter-style, CSS, CSS Counter Styles, CSS Descriptor, Reference
		The system descriptor specifies the algorithm to be used for converting the integer value of a counter to a string representation. It is used in a @counter-style to define the behavior of the defined style.
307	@document	At-rule, CSS, Reference
		The @document CSS at-rule restricts the style rules contained within it based on the URL of the document. It is designed primarily for user-defined style sheets, though it can be used on author-defined style sheets, too.
308	@font-face	@font-face, At-rule, CSS, CSS Fonts, Fonts, Reference, typography
		The @font-face CSS at-rule specifies a custom font with which to display text; the font can be loaded from either a remote server or the user's own computer.
309	font-display	@font-face, CSS, CSS Descriptor, CSS Fonts, Experimental, Fonts, Reference, font-display, web fonts
		The font-display descriptor determines how a font face is displayed based on whether and when it is downloaded and ready to use.
310	font-family	@font-face, CSS, CSS Descriptor, CSS Fonts, Reference
		The font-family CSS descriptor allows authors to specify the font family for the font specified in an @font-face rule.
311	font-style	@font-face, CSS, CSS Descriptor, CSS Fonts, Reference
		The font-style CSS descriptor allows authors to specify font styles for the fonts specified in the @font-face rule.
312	font-variation-settings	@font-face, CSS, CSS Descriptor, CSS Fonts, Reference
		The font-variation-settings CSS descriptor allows authors to specify low-level OpenType or TrueType font variations in the @font-face rule.
313	src	@font-face, CSS, CSS Descriptor, CSS Fonts, Reference
		The src CSS descriptor of the @font-face rule specifies the resource containing font data. It is required for the @font-face rule to be valid.
314	unicode-range	CSS, CSS Fonts, CSS Property, Experimental, Layout, Reference, Web
		The unicode-range CSS descriptor sets the specific range of characters to be used from a font defined by @font-face and made available for use on the current page. If the page doesn't use any character in this range, the font is not downloaded; if it uses at least one, the whole font is downloaded.
315	@font-feature-values	At-rule, CSS, CSS Fonts, Reference
		The @font-feature-values CSS at-rule lets you use a common name in the font-variant-alternates property for features activated differently in OpenType. This can help simplify your CSS when using multiple fonts.
316	@import	At-rule, CSS, CSS Conditional Rules, Reference
		The @import CSS at-rule is used to import style rules from other style sheets. These rules must precede all other types of rules, except @charset rules; as it is not a nested statement, @import cannot be used inside conditional group at-rules.
317	@keyframes	Animations, At-rule, CSS, Reference
		The @keyframes CSS at-rule controls the intermediate steps in a CSS animation sequence by defining styles for keyframes (or waypoints) along the animation sequence.
318	@media	@media, At-rule, CSS, Reference
		The @media CSS at-rule can be used to apply part of a style sheet based on the result of one or more media queries.
319	-moz-device-pixel-ratio	@media, CSS, Deprecated, Non-standard, media feature
		The -moz-device-pixel-ratio Gecko-only CSS media feature can be used to apply styles based on the number of device pixels per CSS pixel.
320	-moz-mac-graphite-theme	@media, CSS, Non-standard, media feature
		The -moz-mac-graphite-theme Gecko-only CSS media feature can be used to apply styles based on whether the user has the Mac OS X "Graphite" theme enabled.
321	-moz-maemo-classic	@media, CSS, Non-standard, media feature
		The -moz-maemo-classic Gecko-only CSS media feature can be used to apply styles based on whether the user agent is using the original Maemo theme.
322	-moz-os-version	@media, CSS, Non-standard, media feature
		The -moz-os-version Gecko-only CSS media feature can be used to apply styles based on the user's version of Microsoft Windows. This can be useful for adapting application skins and other chrome code depending on the user's operating system version.
323	-moz-scrollbar-end-backward	@media, CSS, Non-standard, media feature
		Media: media/visual Accepts min/max prefixes: no
324	-moz-scrollbar-end-forward	@media, CSS, Non-standard, media feature
		Media: media/visual Accepts min/max prefixes: no
325	-moz-scrollbar-start-backward	@media, CSS, Non-standard, media feature
		Media: media/visual Accepts min/max prefixes: no
326	-moz-scrollbar-start-forward	@media, CSS, Non-standard, media feature
		Media: media/visual Accepts min/max prefixes: no
327	-moz-scrollbar-thumb-proportional	@media, CSS, Non-standard, media feature
		Media: media/visual Accepts min/max prefixes: no
328	-moz-touch-enabled	@media, CSS, Non-standard, media feature
		Media: media/visual Accepts min/max prefixes: no
329	-moz-windows-accent-color-in-titlebar	@media, CSS, Non-standard, media feature
		The -moz-windows-accent-color-in-titlebar Gecko-only CSS media feature can be used to apply styles based on whether accent colors are enabled in Microsoft Windows titlebars.
330	-moz-windows-classic	@media, CSS, Non-standard, media feature
		Media: media/visual Accepts min/max prefixes: no
331	-moz-windows-compositor	@media, CSS, Non-standard, media feature
		Media: media/visual Accepts min/max prefixes: no
332	-moz-windows-default-theme	@media, CSS, Non-standard, media feature
		Media: media/visual Accepts min/max prefixes: no
333	-moz-windows-glass	@media, CSS, Non-standard, media feature
		Media: media/visual Accepts min/max prefixes: no
334	-moz-windows-theme	@media, CSS, Non-standard, media feature
		The -moz-windows-theme Gecko-only CSS media feature is useful for customizing application skins and other chrome code to work well with the user's Windows theme.
335	-ms-high-contrast	@media, CSS, Non-standard, Reference, media feature
		The -ms-high-contrast CSS media feature is a Microsoft extension that describes whether the application is being displayed in high contrast mode, and with what color variation.
336	-webkit-animation	@media, CSS, Reference, WebKit, media feature
		The -webkit-animation Boolean CSS media feature is a Chrome extension whose value is true if vendor-prefixed CSS animations are supported.
337	-webkit-device-pixel-ratio	@media, CSS, NeedsBrowserCompatibility, Non-standard, WebKit, media feature
		The -webkit-device-pixel-ratio is a non-standard Boolean CSS media feature which is an alternative to the standard resolution media feature.
338	-webkit-transform-2d	@media, CSS, Non-standard, Reference, WebKit, media feature
		The -webkit-transform-2d Boolean CSS media feature is a Chrome extension whose value is true if vendor-prefixed CSS 2D transforms are supported.
339	-webkit-transform-3d	@media, CSS, Non-standard, Reference, WebKit, media feature
		The -webkit-transform-3d Boolean CSS media feature is a Chrome extension whose value is true if vendor-prefixed CSS 3D transforms are supported.
340	-webkit-transition	@media, Blink, CSS, Deprecated, Non-standard, Reference, WebKit, media feature
		The -webkit-transition Boolean CSS media feature is a Chrome extension whose value is true if the browsing context supports CSS transitions. It was never supported in browsers not based on WebKit or Blink.
341	any-hover	@media, CSS, Media Queries, Reference, media feature
		The any-hover CSS media feature can be used to test whether any available input mechanism can hover over elements.
342	any-pointer	@media, CSS, Media Queries, Reference, media feature
		The any-pointer CSS media feature tests whether the user has any pointing device (such as a mouse), and if so, how accurate it is.
343	aspect-ratio	@media, CSS, Media Queries, Reference, media feature
		The aspect-ratio CSS media feature can be used to test the aspect ratio of the viewport.
344	color	@media, CSS, Media Queries, Reference, media feature
		The color CSS media feature can be used to test the number of bits per color component (red, green, blue) of the output device.
345	color-gamut	@media, CSS, Media Queries, Reference, media feature
		The color-gamut CSS media feature can be used to test the approximate range of colors that are supported by the user agent and the output device.
346	color-index	@media, CSS, Media Queries, Reference, media feature
		The color-index CSS media feature can be used to test the number of entries in the output device's color lookup table.
347	device-aspect-ratio	@media, CSS, Deprecated, Media Queries, Reference, Web, media feature
		The device-aspect-ratio CSS media feature can be used to test the width-to-height aspect ratio of an output device.
348	device-height	@media, CSS, Deprecated, Media Queries, Reference, media feature
		The device-height CSS media feature can be used to test the height of an output device's rendering surface.
349	device-width	@media, CSS, Deprecated, Media Queries, Reference, media feature
		The device-width CSS media feature can be used to test the width of an output device's rendering surface.
350	display-mode	@media, CSS, Media Queries, Reference, display, display-mode, media feature, web app manifest
		The display-mode CSS media feature can be used to test the display mode of an application. You can use it to provide a consistent user experience between launching a site from a URL and launching it from a desktop icon.
351	grid	@media, CSS, Media Queries, Reference, media feature
		The grid CSS media feature can be used to test whether the output device uses a grid-based screen.
352	height	@media, CSS, Media Queries, Reference, media feature
		The height CSS media feature can be used to apply styles based on the height of the viewport (or the page box, for paged media).
353	hover	@media, CSS, Media Queries, Reference, media feature
		The hover CSS media feature can be used to test whether the user's primary input mechanism can hover over elements.
354	inverted-colors	@media, CSS, Media Queries, Reference, media feature
		The inverted-colors CSS media feature can be used to test whether the user agent or underlying OS is inverting colors.
355	light-level	@media, CSS, Media Queries, Non-standard, Reference, media feature
		The light-level CSS media feature can be used to test the ambient light level.
356	monochrome	@media, CSS, Media Queries, Reference, media feature
		The monochrome CSS media feature can be used to test the number of bits per pixel in the monochrome frame buffer of the output device.
357	orientation	@media, CSS, Media Queries, NeedsBrowserCompatibility, Reference, media feature
		The orientation CSS media feature can be used to test the orientation of the viewport (or the page box, for paged media).
358	overflow-block	@media, CSS, Media Queries, Reference, media feature
		The overflow-block CSS media feature can be used to test how the output device handles content that overflows the initial containing block along the block axis.
359	overflow-inline	@media, CSS, Media Queries, Reference, media feature
		The overflow-inline CSS media feature can be used to test how the output device handles content that overflows the initial containing block along the inline axis.
360	pointer	@media, CSS, Media Queries, Reference, media feature
		The pointer CSS media feature tests whether the user has a pointing device (such as a mouse), and if so, how accurate the primary pointing device is.
361	prefers-reduced-motion	@media, CSS, Media Queries, Reference, media feature
		The prefers-reduced-motion CSS media feature is used to detect if the user has requested that the system minimize the amount of animation or motion it uses.
362	resolution	@media, CSS, Media Queries, Reference, media feature
		The resolution CSS media feature can be used to test the pixel density of the output device.
363	scan	@media, CSS, Media Queries, Reference, media feature
		The scan CSS media feature can be used to test the scanning process (if any) utilized by the output device. The word scanning used in this context does not refer to an image scanner, such as one used to digitize a photograph. Rather, it means the process by which an image is painted onto a television screen (or other device).
364	scripting	@media, CSS, Media Queries, Reference, media feature
		The scripting CSS media feature can be used to test whether scripting (such as JavaScript) is available.
365	update	@media, CSS, Media Queries, Reference, media feature
		The update CSS media feature can be used to test how frequently (if at all) the output device is able to modify the appearance of content.
366	width	@media, CSS, Media Queries, Reference, media feature
		The width CSS media feature can be used to test the width of the viewport (or the page box, for paged media).
367	@namespace	At-rule, CSS, Layout, Reference, Web
		@namespace is an at-rule that defines XML namespaces to be used in a CSS style sheet. The defined namespaces can be used to restrict the universal, type, and attribute selectors to only select elements within that namespace. The @namespace rule is generally only useful when dealing with documents containing multiple namespaces—such as HTML5 with inline SVG or MathML, or XML that mixes multiple vocabularies.
368	@page	@page, At-rule, CSS, Layout, Reference, Web
		The @page CSS at-rule is used to modify some CSS properties when printing a document. You can't change all CSS properties with @page. You can only change the margins, orphans, widows, and page breaks of the document. Attempts to change any other CSS properties will be ignored.
369	bleed	@page, CSS, CSS Descriptor, Experimental, NeedsBrowserCompatibility, NeedsMobileBrowserCompatibility, Reference, Web
		The bleed CSS at-rule descriptor, used with the @page at-rule, specifies the extent of the page bleed area outside the page box. This property only has effect if crop marks are enabled using the marks property.
370	marks	@page, CSS, CSS Descriptor, Experimental, Layout, Reference, Web
		The marks CSS at-rule descriptor, used with the @page at-rule, adds crop and/or cross marks to the presentation of the document. Crop marks indicate where the page should be cut. Cross marks are used to align sheets.
371	size	@page, CSS, CSS Descriptor, Experimental, NeedsBrowserCompatibility, Reference, Web
		The size CSS at-rule descriptor, used with the @page at-rule, defines the size and orientation of the box which is used to represent a page. Most of the time, this size corresponds to the target size of the printed page if applicable.
372	@styleset	CSS, NeedsContent, Reference, Web
		See @font-feature-values .
373	@supports	At-rule, CSS, Layout, Reference, Web
		The @supports CSS at-rule lets you specify declarations that depend on a browser's support for one or more specific CSS features. This is called a feature query. The rule may be placed at the top level of your code or nested inside any other conditional group at-rule.
374	@viewport	@viewport, At-rule, CSS, Layout, Mobile, Reference, Screen Layout, viewport
		The @viewport CSS at-rule lets you configure the viewport through which the document is viewed. It's primarily used for mobile devices, but is also used by desktop browsers that support features like "snap to edge" (such as Microsoft Edge).
375	height	@viewport, CSS, CSS Descriptor, Reference
		The height CSS descriptor is a shorthand descriptor for setting both min-height and max-height of the viewport. by providing one viewport length value will set both, the minimum height and the maximum height, to the value provided.
376	max-height	@viewport, CSS, CSS Descriptor, Reference
		The max-height CSS descriptor specifies the maximum height of the viewport of a document defined via the @viewport at-rule.
377	max-width	@viewport, CSS, CSS Descriptor, Reference
		The max-width CSS descriptor specifies the maximum width of the viewport of a document defined via the @viewport at-rule.
378	max-zoom	@viewport, CSS, CSS Descriptor, NeedsExample, Reference
		The max-zoom CSS descriptor sets the maximum zoom factor of a document defined by the @viewport at-rule. The browser will not zoom in any further than this, whether automatically or at the user's request.
379	min-height	@viewport, CSS, CSS Descriptor, Reference
		The min-height CSS descriptor specifies the minimum height of the viewport of a document defined via the @viewport at-rule.
380	min-width	@viewport, CSS, CSS Descriptor, Reference
		The min-width CSS descriptor specifies the minimum width of the viewport of a document defined via @viewport.
381	min-zoom	@viewport, CSS, CSS Descriptor, NeedsExample, Reference
		The min-zoom CSS descriptor sets the minimum zoom factor of a document defined by the @viewport at-rule. The browser will not zoom out any further than this, whether automatically or at the user's request.
382	orientation	@viewport, CSS, CSS Descriptor, NeedsExample, Reference
		The orientation CSS descriptor controls the orientation of a document defined by @viewport.
383	user-zoom	@viewport, CSS, CSS Descriptor, Graphics, Layout, NeedsBrowserCompatibility, NeedsExample, Reference, Web
		The user-zoom CSS descriptor controls whether or not the user can change the zoom factor of a document defined by @viewport.
384	viewport-fit	@viewport, CSS, CSS Descriptor, Experimental, Mobile, NeedsData.json, NeedsExample, Reference, Screen Layout
		The viewport-fit CSS @viewport descriptor controls how a document's viewport fills the screen.
385	width	@viewport, CSS, CSS Descriptor, Reference
		The width CSS descriptor is shorthand for setting both the min-width and the max-width of the viewport. By providing one viewport length value, that value will determine both the min-width and the max-width to the value provided.
386	zoom	@viewport, CSS, CSS Descriptor, Graphics, Layout, NeedsExample, Reference, Web
		The zoom CSS descriptor sets the initial zoom factor of a document defined by the @viewport at-rule.
387	Actual value	CSS, Reference
		The actual value of a CSS property is the used value of that property after any necessary approximations have been applied. For example, a user agent that can only render borders with a whole-number pixel width may round the thickness of the border to the nearest integer.
388	Adjacent sibling combinator	CSS, NeedsMobileBrowserCompatibility, Reference, Selectors
		The adjacent sibling combinator (+) separates two selectors and matches the second element only if it immediately follows the first element, and both are children of the same parent element.
389	Alternative style sheets	CSS, HTML, NeedsCompatTable, NeedsUpdate, Reference
		Specifying alternative style sheets in a web page provides a way for users to see multiple versions of a page, based on their needs or preferences.
390	Animatable CSS properties	CSS, CSS Animations, CSS Transitions, Reference
		Certain CSS properties can be animated using CSS Animations or CSS Transitions. Animation means that their values can be made to change gradually over a given amount of time.
391	At-rule	At-rule, CSS, Reference
		An at-rule is a CSS statement that instructs CSS how to behave. They begin with an at sign, '@' (U+0040 COMMERCIAL AT), followed by an identifier and includes everything up to the next semicolon, ';' (U+003B SEMICOLON), or the next CSS block, whichever comes first.
392	Attribute selectors	Attribute, Attribute selectors, CSS, CSS 3, CSS 3 Attribute selectors, CSS Attributes, Identifying Elements, Identifying Nodes, Reference, Selecting Elements, Selecting Nodes, Selectors
		The CSS attribute selector matches elements based on the presence or value of a given attribute.
393	CSS Animations	CSS, CSS Animations, Overview, Reference
		CSS Animations is a module of CSS that lets you animate the values of CSS properties over time, using keyframes. The behavior of these keyframe animations can be controlled by specifying their timing function, duration, their number of repetitions, and other attributes.
394	CSS Animations tips and tricks	CSS, CSS Animations, Example, Guide, Reference
		CSS Animations make it possible to do incredible things with the elements that make up your documents and apps. However, there are things you might want to do that aren't obvious, or clever ways to do things that you might not come up with right away. This article is a collection of tips and tricks we've found that may make your work easier, including how to run a stopped animation again.
395	Detecting CSS animation support	Advanced, CSS, CSS Animations, Guide, JavaScript, Junk, Reference
		CSS animations make it possible to do creative animations of content using nothing but CSS. However, there are likely to be times when this feature isn't available, and you may wish to handle that case by using JavaScript code to simulate a similar effect. This article, based on this blog post by Chris Heilmann, demonstrates a technique for doing this.
396	Using CSS animations	Advanced, CSS, CSS Animations, Example, Guide
		CSS animations make it possible to animate transitions from one CSS style configuration to another.
397	CSS Backgrounds and Borders	CSS, CSS Backgrounds and Borders, Overview, Reference
		CSS Backgrounds and Borders is a module of CSS that lets you style elements' backgrounds and borders. Backgrounds can be filled with a color or image, clipped or resized, and otherwise modified. Borders can be decorated with lines or images, and made square or rounded. Additionally, element boxes can be decorated with a shadow.
398	Scaling background images	CSS, CSS Background, Example, Guide, Intermediate, Reference, Web
		The background-size CSS property makes it possible to adjust the width and height of background images, thus overriding the default behavior which tiles background images at their full size.
399	Using multiple backgrounds	CSS, CSS Background, Example, Guide, Reference
		You can apply multiple backgrounds to elements. These are layered atop one another with the first background you provide on top and the last background listed in the back.
400	CSS Basic Box Model	CSS, CSS Box Model, Overview, Reference
		CSS Basic Box Model is a module of CSS that defines the rectangular boxes—including their padding and margin—that are generated for elements and laid out according to the visual formatting model.
401	Introduction to the CSS basic box model	CSS, CSS Box Model, Guide, Layout, Position, box, box model, height, size, width
		When laying out a document, the browser's rendering engine represents each element as a rectangular box according to the standard CSS basic box model. CSS determines the size, position, and properties (color, background, border size, etc.) of these boxes.
402	Mastering margin collapsing	CSS, CSS Box Model, Guide, Reference
		The top and bottom margins of blocks are sometimes combined (collapsed) into a single margin whose size is the largest of the individual margins (or just one of them, if they are equal), a behavior known as margin collapsing. Note that the margins of floating and absolutely positioned elements never collapse.
403	CSS Basic User Interface	CSS, CSS Basic User Interface, Overview, Reference
		CSS Basic User Interface is a CSS module that lets you define the rendering and functionality of features related to the user interface.
404	CSS Box Alignment	CSS, Grid Layout, alignment, box alignment, flexbox, multi-column
		The CSS Box Alignment module specifies CSS features that relate to the alignment of boxes in the various CSS box layout models: block layout, table layout, flex layout, and grid layout. The module aims to create a consistent method of alignment across all of CSS. This document details the general concepts found in the specification.
405	Box alignment for block, absolutely positioned and table layout	Block, CSS, absolutely positioned, box alignment, table
		The Box Alignment Specification details how alignment works in various layout methods. In this page we explore how box alignment works in the context of block layout, including floated, positioned, and table elements. As this page aims to detail things which are specific to block layout and box alignment, it should be read in conjunction with the main Box Alignment page, which details the common features of box alignment across layout methods.
406	Box alignment in Flexbox	CSS, box alignment, flexbox
		The Box Alignment Specification details how alignment works in various layout methods; on this page we explore how box alignment works in the context of Flexbox. As this page aims to detail things which are specific to Flexbox and box alignment, it should be read in conjunction with the main Box Alignment page which details the common features of box alignment across layout methods.
407	Box alignment in Multi-column Layout	CSS, box alignment, multi-column
		The Box Alignment Specification details how alignment works in various layout methods; on this page we explore how Box Alignment works in the context of Multi-column Layout. As this page aims to detail things which are specific to Multi-column Layout and Box Alignment, it should be read in conjunction with the main Box Alignment page which details the common features of Box Alignment across layout methods.
408	Box alignment in grid layout	CSS, box alignment, grid
		The Box Alignment specification details how alignment works in various layout methods. On this page we explore how box alignment works in the context of CSS Grid Layout.
409	CSS Charsets	CSS, CSS Charsets, Overview, Reference
		CSS Charsets is a module of CSS that lets you specify the character set used in the style sheet.
410	CSS Color	CSS, CSS Colors, HTML Colors, Overview, Reference, Styles, Styling HTML, colors
		CSS Color is a CSS module that deals with colors, color types, color blending, opacity, and how you can apply these colors and effects to HTML content.
411	CSS Conditional Rules	CSS, CSS Conditional Rules, Overview, Reference
		CSS Conditional Rules is a CSS module that allows to define a set of rules that will only apply based on the capabilities of the processor or the document the style sheet is being applied to.
412	CSS Counter Styles	CSS, CSS Counter Styles, NeedsContent, Overview, Reference
		CSS Counter Styles is a module of CSS that lets you define your own counter styles.
413	CSS Custom Properties for Cascading Variables	CSS, CSS Variables, Overview, Reference
		CSS Custom Properties for Cascading Variables is a CSS module that allows for the creation of custom properties that can be used over and over.
414	CSS Device Adaptation	CSS, CSS Device Adaptation, Overview, Reference
		CSS Device Adaptation is a module of CSS that lets you define the size, zoom factor, and orientation of the viewport.
415	CSS Display	CSS, CSS Display, Overview, Reference
		CSS Display is a module of CSS that defines how the CSS formatting box tree is generated from the document element tree and defines properties controlling it.
416	CSS Flexible Box Layout	CSS, CSS Flexible Boxes, Overview, Reference
		CSS Flexible Box Layout is a module of CSS that defines a CSS box model optimized for user interface design, and the layout of items in one dimension. In the flex layout model, the children of a flex container can be laid out in any direction, and can “flex” their sizes, either growing to fill unused space or shrinking to avoid overflowing the parent. Both horizontal and vertical alignment of the children can be easily manipulated.
417	Aligning Items in a Flex Container	Align, CSS, Flex, Guide, align-content, align-items, align-self, alignment, flexbox, justify, justify-content
		One of the reasons that flexbox quickly caught the interest of web developers is that it brought proper alignment capabilities to the web for the first time. It enabled proper vertical alignment, so we can at last easily centre a box. In this guide, we will take a thorough look at how the alignment and justification properties work in Flexbox.
418	Backwards Compatibility of Flexbox	@supports, CSS, CSS Tables, Flexible Boxes, Floats, fallbacks, feature queries, flexbox, inline-block
		Flexbox is very well supported across modern browsers, however there are a few issues that you might run into. In this guide we will look at how well flexbox is supported in browsers, and look at some potential issues, resources and methods for creating workarounds and fallbacks.
419	Basic concepts of flexbox	CSS, Flex, Guide, axes, concepts, container, flexbox
		The Flexible Box Module, usually referred to as flexbox, was designed as a one-dimensional layout model, and as a method that could offer space distribution between items in an interface and powerful alignment capabilities. This article gives an outline of the main features of flexbox, which we will be exploring in more detail in the rest of these guides.
420	Controlling Ratios of Flex Items Along the Main Axis	Basis, CSS, Flex, Guide, flexbox, free space, grow, max-content, min-content, shrink, space
		In this guide we will be exploring the three properties that are applied to flex items, which enable us to control the size and flexibility of the items along the main axis — flex-grow, flex-shrink, and flex-basis. Fully understanding how these properties work with growing and shrinking items is the real key to mastering flexbox.
421	Cross-browser Flexbox mixins	CSS, CSS Flexible Boxes, Reference, mixins
		This article provides a set of mixins for those who want to mess around with flexbox using the native support of current browsers.
422	Mastering Wrapping of Flex Items	CSS, Flex, Guide, collapsed items, flexbox, grid, wrapping
		Flexbox was designed as a single dimensional layout, meaning that it deals with laying out items as a row or as a column — but not both at once. There is however the ability to wrap flex items onto new lines, creating new rows if flex-direction is row and new columns if flex-direction is column. In this guide I will explain how this works, what it is designed for and what situations really require CSS Grid Layout rather than flexbox.
423	Ordering Flex Items	Accessibility, CSS, Flex, Guide, direction, flexbox, order, reverse
		New layout methods such as Flexbox and Grid bring with them the possibility of controlling the order of content. In this article we will take a look at ways in which you can change the visual order of your content when using Flexbox. We will also consider the implications of reordering items from an accessibility point of view.
424	Relationship of flexbox to other layout methods	CSS, Guide, Writing Mode, box alignment, contents, display, flexbox, grid
		In this article we will take a look at how Flexbox fits in with all the other CSS modules. We’ll find out which specifications you also need to take notice of if you want to learn flexbox, and find out why flexbox is different to some other modules.
425	Typical use cases of Flexbox	CSS, Flexible Box, Guide, common uses, flexbox, patterns
		In this guide we will take a look at some of the common use cases for flexbox — those places where it makes more sense than another layout method.
426	CSS Flow Layout	CSS, CSS Flow Layout, Guide, Intermediate, Layout, Reference, flow
		Normal Flow, or Flow Layout, is the way that Block and Inline elements are displayed on a page before any changes are made to their layout. The flow is essentially a set of things that are all working together and know about each other in your layout. Once something is taken out of flow it works independently.
427	Block and Inline Layout in Normal Flow	CSS, CSS Flow Layout, Guide, Intermediate, Layout, Margins, flow
		In this guide we have looked at how elements display in normal flow, as block and inline elements. Due to the default behaviour of these elements, an HTML document with no CSS styling at all, will display in a readable way. By understanding how normal flow works you will find layout easier, as you understand the starting point for making changes to how elements are displayed.
428	Flow Layout and Overflow	CSS, Flow Layout, Guide, Intermediate, Layout, Visibility, overflow, text-overflow
		Whether you are in continuous media on the web or in a Paged Media format such as print or EPUB, understanding how content overflows is useful when dealing with any layout method. By understanding how overflow works in normal flow, you should find it easier to understand the implications of overflow content in layout methods such as grid and flexbox.
429	Flow Layout and Writing Modes	CSS, Flow Layout, Guide, Orientation, Writing-mode
		In most cases, flow layout works as you would expect it to when changing the writing mode of the document or parts of the document. This can be used to properly typeset vertical languages or for creative reasons. CSS is making this easier by way of introducing logical properties and values so that when working in a vertical writing mode sizing can be based on element's inline and block size. This will be useful when creating components which can work in different writing-modes.
430	Formatting Contexts Explained	Block Formatting Context, CSS, Guide, Intermediate, Layout, flow
		In this guide, we have looked in more detail at the Block and Inline formatting contexts and the important subject of creating a Block Formatting Context (BFC). In the next guide, we will find out how normal flow interacts with different writing modes.
431	In Flow and Out of Flow	CSS, CSS Flow Layout, Flow Layout, Guide, Intermediate, Layout, flow
		In this guide we have covered the ways to take an element out of flow in order to achieve some very specific types of positioning. In the next guide we will look at a related issue, that of creating a Block Formatting Context, in Formatting Contexts Explained.
432	CSS Fonts	CSS, CSS Fonts, Overview, Reference
		CSS Fonts is a module of CSS that defines font-related properties and how font resources are loaded. It lets you define the style of a font, such as its family, size and weight, line height, and the glyph variants to use when multiple are available for a single character.
433	Variable fonts guide	CSS, Fonts, Text, variable fonts, web fonts
		Variable fonts are an evolution of the OpenType font specification that enables many different variations of a typeface to be incorporated into a single file, rather than having a separate font file for every width, weight, or style. They let you access all the variations contained in a given font file via CSS and a single @font-face reference. This article will give you all you need to know to get you started using variable fonts.
434	CSS Fragmentation	CSS, CSS Fragmentation, NeedsCompatTable, NeedsContent, Overview, Reference
		CSS Fragmentation is a module of CSS that defines how content is displayed when it is broken (fragmented) across multiple pages, regions, or columns.
435	CSS Generated Content	CSS, CSS Generated Content, Overview, Reference
		CSS Generated Content is a module of CSS that defines how to add content to an element.
436	CSS Grid Layout	CSS, Grid Layout, Grids, Layout, Overview, Reference
		CSS Grid Layout excels at dividing a page into major regions or defining the relationship in terms of size, position, and layer, between parts of a control built from HTML primitives.
437	Auto-placement in CSS Grid Layout	CSS, CSS Grids, Guide
		In addition to the ability to place items accurately onto a created grid, the CSS Grid Layout specification contains rules that control what happens when you create a grid and do not place some or all of the child items. You can see auto-placement in action in the simplest of ways by creating a grid on a set of items. If you give the items no placement information they will position themselves on the grid, one in each grid cell.
438	Basic concepts of grid layout	CSS, CSS Grids, Guide, Layout
		CSS Grid Layout introduces a two-dimensional grid system to CSS. Grids can be used to layout major page areas or small user interface elements. This article introduces the CSS Grid Layout and the new terminology that is part of the CSS Grid Layout Level 1 specification. The features shown in this overview will be then explained in greater detail in the rest of this guide.
439	Box alignment in CSS Grid Layout	Alignment in Grids, Boxes, CSS, CSS Grid, Grid Alignment, Guide, alignment, box alignment
		This guide presents demonstrations of how box alignment in grid layout works. You will see many similarities in how these properties and values work in flexbox.
440	CSS Grid Layout and Accessibility	Accessibility, CSS, CSS Grids, Guide
		Those of us who have been doing web development for more years than we care to remember might consider that CSS Grid is a little bit like using “tables for layout”. Back in the early days of web design, the way we constructed page layout was to use HTML tables, then fragment our design into the cells of those tables in order to create a layout. This had some advantages over the “CSS Positioning” that came afterwards, in that we could take advantage of the alignment and full height columns offered by table display. The biggest downside however was that it tied our design to the mark-up, often creating accessibility issues as it did so. In order to lay the design out in the table we often broke up the content in ways that made no sense at all when read out by a screen reader for example.
441	CSS Grid Layout and Progressive Enhancement	CSS, CSS Grids, Design, Guide
		we now have CSS Grid Layout support in the public versions of Firefox, Chrome, Opera, Safari and Edge. However, while evergreen browsers mean that many of us are going to see the majority of users having Grid Layout support very quickly, there are also old or non-supporting browsers to contend with. In this guide we will walk through a variety of strategies for support.
442	CSS grids, logical values and writing modes	CSS, CSS Grids, Guide
		For this guide, we will look at this feature of grid and other modern layout methods, learning a little about writing modes and logical vs. physical properties as we do so.
443	Grid template areas	CSS, CSS Grids, Guide
		In the previous guide we looked at grid lines, and how to position items against those lines. When you use CSS Grid Layout you always have lines, and this can be a straightforward way to place items on your grid. However, there is an alternate method to use for positioning items on the grid which you can use alone or in combination with line-based placement. This method involves placing our items using named template areas, and we will find out exactly how this method works. You will see very quickly why we sometimes call this the ascii-art method of grid layout!
444	Layout using named grid lines	CSS, CSS Grids, Guide
		In previous guides we’ve looked at placing items by the lines created by defining grid tracks and also how to place items using named template areas. In this guide we are going to look at how these two things work together when we use named lines. Line naming is incredibly useful, but some of the more baffling looking grid syntax comes from this combination of names and track sizes. Once you work through some examples it should become clearer and easier to work with.
445	Line-based placement with CSS Grid	CSS, CSS Grids, Guide
		In the article covering the basic concepts of grid layout, we started to look at how to position items on a grid using line numbers. In this article we will fully explore how this fundamental feature of the specification works.
446	Realizing common layouts using CSS Grid Layout	CSS, CSS Grids, Guide
		To round off this set of guides to CSS Grid Layout, I am going to walk through a few different layouts, which demonstrate some of the different techniques you can use when designing with grid layout. We will look at an example using grid-template-areas, a typical 12-column flexible grid system, and also a product listing using auto-placement. As you can see from this set of examples, there is often more than one way to achieve the result you want with grid layout. Choose the method you find most helpful for the problems that you are solving and the designs that you need to implement.
447	Relationship of grid layout to other layout methods	CSS, CSS Grids, Guide
		CSS Grid Layout has been designed to work alongside other parts of CSS, as part of a complete system for doing the layout. In this guide, I will explain how a grid fits together with other techniques you may already be using.
448	CSS Images	CSS, CSS Images, Overview, Reference
		CSS Images is a module of CSS that defines what types of images can be used (the <image> type, containing URLs, gradients and other types of images), how to resize them and how they, and other replaced content, interact with the different layout models.
449	Implementing image sprites in CSS	Advanced, CSS, CSS Images, Graphics, Guide, NeedsContent, Sprites, Web
		Image sprites are used in numerous web apps where multiple images are used. Rather than include each image as a separate image file, it is much more memory- and bandwidth-friendly to send them as a single image, so the number of HTTP requests is reduced.
450	Using CSS gradients	Advanced, CSS, CSS Images, Example, Guide, Web
		CSS gradients are represented by the <gradient> data type, a special type of <image> made of a progressive transition between two or more colors. You can choose between two types of gradients: linear (created with the linear-gradient() function) and radial (created with radial-gradient()).
451	CSS Lists	CSS, CSS Lists, Overview, Reference
		CSS Lists is a module of CSS that defines how lists can be laid out and styled.
452	Consistent list indentation	CSS, Guide, NeedsUpdate
		One of the most common style changes made to lists is a change in the indentation distance—that is, how far the list items are pushed over to the right.
453	Using CSS counters	Advanced, CSS, CSS Counter Styles, Guide, Layout, Reference, Web
		CSS counters let you adjust the appearance of content based on its location in a document. For example, you can use counters to automatically number the headings in a webpage. Counters are, in essence, variables maintained by CSS whose values may be incremented by CSS rules to track how many times they're used.
454	CSS Logical Properties and Values	CSS, CSS Logical Properties, Overview, Reference
		CSS Logical Properties and Values is a module of CSS that introduces logical properties and values that provide the ability to control layout through logical, rather than physical, direction and dimension mappings.
455	CSS Masking	CSS, CSS Masking, NeedsBrowserCompatibility, NeedsMobileBrowserCompatibility, Overview, Reference
		CSS Masking is a CSS module that defines means, including masking and clipping, for partially or fully hiding portions of visual elements.
456	CSS Miscellaneous	CSS, Overview, Reference
		These pages contain CSS properties that are highly experimental or don't fit in any other categories.
457	CSS Multi-column Layout	CSS, CSS Multi-column Layout, Layout, Overview, Reference
		CSS Multi-column Layout is a module of CSS that adds support for multi-column layouts. Support is included for establishing the number of columns in a layout, as well as how content should flow from column to column, gap sizes between columns, and column dividing lines (known as column rules) along with their appearance.
458	Basic Concepts of Multicol	CSS, CSS Multi-column Layout, Guide, Layout
		Multiple-column Layout, usually referred to as multicol, is a specification for laying out content into a set of column boxes much like columns in a newspaper. This guide explains how the specification works with some common use case examples.
459	Handling Overflow in Multicol	CSS, CSS Multi-column Layout, Guide, Layout
		In this guide we look at how multicol deals with overflow, both inside the column boxes and in situations where there is more content than will fit into the container.
460	Handling content breaks in multicol	CSS, CSS Multi-column Layout, Guide, Layout
		Content is broken between column boxes in multiple-column layout in the same way that it is broken between pages in paged media. In both contexts we control where and how things break by using properties of the CSS Fragmentation specification. In this guide we see how Fragmentation works in multicol.
461	Spanning and Balancing Columns	CSS, CSS Multi-column Layout, Guide, Layout
		In this guide we look at how to make elements span across columns inside the multicol container and how to control how the columns are filled.
462	Styling Columns	CSS, CSS Multi-column Layout, Guide, Layout
		This details all the current ways in which column boxes can be styled. In the next guide we will take a look at making elements inside a container span across all columns.
463	Using multi-column layouts	Advanced, CSS, CSS Multi-column Layout, Guide, Layout, Web
		The CSS Multi-column Layout Module extends the block layout mode to allow the easy definition of multiple columns of text.
464	CSS Namespaces	CSS, CSS Namespaces, NeedsMobileBrowserCompatibility, Overview, Reference, Web
		CSS Namespaces is a CSS module that allows authors to specify XML namespaces in CSS.
465	CSS Paged Media	CSS, CSS Paged Media, Overview, Reference
		CSS Paged Media is a module of CSS that defines how page switches are handled.
466	CSS Positioned Layout	CSS, CSS Positioning, Overview, Reference
		CSS Positioned Layout is a module of CSS that defines how to position elements on the page.
467	Understanding CSS z-index	Advanced, CSS, Guide, Reference, Understanding_CSS_z-index, z-index
		The z-index attribute lets you adjust the order of the layering of objects when rendering content.
468	Stacking context example 1	Advanced, CSS, Understanding_CSS_z-index
		Let's start with a basic example. In the root stacking context we have two DIVs (DIV #1 and DIV #3), both relatively positioned, but without z-index properties. Inside DIV #1 there is an absolutely positioned DIV #2, while in DIV #3 there is an absolutely positioned DIV #4, both without z-index properties.
469	Stacking context example 2	Advanced, CSS, Understanding_CSS_z-index
		This is a very simple example, but it is the key for understanding the concept of stacking context. There are the same four DIVs of the previous example, but now z-index properties are assigned on both levels of the hierarchy.
470	Stacking context example 3	Advanced, CSS, Understanding_CSS_z-index
		This last example shows problems that arise when mixing several positioned elements in a multi-level HTML hierarchy and when z-indexes are assigned using class selectors.
471	Stacking with floated blocks	Advanced, CSS, Guide, Reference, Understanding_CSS_z-index, z-index
		For floated blocks, the stacking order is a bit different. Floating blocks are placed between non-positioned blocks and positioned blocks:
472	Stacking without the z-index property	Advanced, CSS, Guide, Reference, Understanding_CSS_z-index, z-index
		When the z-index property is not specified on any element, elements are stacked in the following order (from bottom to top):
473	The stacking context	Advanced, CSS, Guide, Reference, Understanding_CSS_z-index, z-index
		The stacking context is a three-dimensional conceptualization of HTML elements along an imaginary z-axis relative to the user, who is assumed to be facing the viewport or the webpage. HTML elements occupy this space in priority order based on element attributes.
474	Using z-index	Advanced, CSS, Guide, Reference, Understanding_CSS_z-index, z-index
		The first part of this article, Stacking without the z-index property, explains how stacking is arranged by default. If you want to create a custom stacking order, you can use the z-index property on a positioned element.
475	CSS Properties Reference	CSS, Style
		The following is a basic list of the most common CSS properties with the equivalent of the DOM notation which is usually accessed from JavaScript:
476	CSS Ruby Layout	CSS, CSS Ruby, Overview, Reference
		CSS Ruby Layout is a module of CSS that provides the rendering model and formatting controls related to the display of ruby annotation. Ruby annotation is a form of interlinear annotation, consisting of short runs of text alongside the base text. They are typically used in East Asian documents to indicate pronunciation or to provide a short annotation.
477	CSS Scroll Snap	CSS, CSS Scroll Snap, Overview, Reference
		CSS Scroll Snap is a module of CSS that introduces scroll snap positions, which enforce the scroll positions that a scroll container’s scrollport may end at after a scrolling operation has completed.
478	CSS Scroll Snap Points	CSS, CSS Scroll Snap, Overview, Reference
		CSS Scroll Snap Points is a module of CSS that introduces scroll snap positions. These determine the specific positions that a container’s scrollport may end at after a scrolling operation has completed.
479	CSS Shapes	Boundaries, CSS, CSS Shapes, Overview, Reference, Shape, margin, wrapping
		CSS Shapes describe geometric shapes for use in CSS. For the Level 1 specification, CSS Shapes can be applied to floating elements.
480	Basic Shapes	CSS, CSS Shapes, Guide, Reference
		CSS Shapes can be defined using the <basic-shape> type, and in this guide I’ll explain how each of the different values accepted by this type work. They range from simple circles to complex polygons.
481	Overview of CSS Shapes	CSS, CSS Shapes, Overview, shapes
		The CSS Shapes Level 1 Specification describes geometric shapes in CSS. They are, in Level 1 of the specification, designed to be applied to floated items. This article provides an overview of what you can do with shapes.
482	Shapes From Images	CSS, CSS Shapes, Guide
		In this guide we will take a look at how we can create a shape from an image file with an alpha channel or even from a CSS Gradient. This is a very flexible way to create shapes. Rather than drawing a path with a complex polygon in CSS, you can create the shape in a graphics program and then use the path created by the pixels less opaque than a threshold value.
483	Shapes from box values	Boundaries, Boxes, CSS, CSS Shapes, Margins, border-box, border-radius, box values, content-box, float, margin-box, padding-box, shapes
		A straightforward way to create a shape is to use a value from the CSS Box Model. This article explains how to do this.
484	CSS Table	CSS, CSS Table, Overview, Reference
		CSS Table is a CSS module that defines how to lay out table data.
485	CSS Text	CSS, CSS Text, Overview
		CSS Text is a module of CSS that defines how to perform text manipulation, like line breaking, justification and alignment, white space handling, and text transformation.
486	CSS Text Decoration	CSS, CSS Text Decoration, Overview, Reference
		CSS Text Decoration is a module of CSS that defines features relating to text decoration, such as underlines, text shadows, and emphasis marks.
487	CSS Transforms	CSS, CSS Transforms, Overview, Reference
		CSS Transforms is a module of CSS that defines how elements styled with CSS can be transformed in two-dimensional or three-dimensional space.
488	Using CSS transforms	3D, Advanced, CSS, CSS Transforms, Graphics, Guide, Rotate, Scale, Scaling, perspective, rotation
		By modifying the coordinate space, CSS transforms change the shape and position of the affected content without disrupting the normal document flow. This guide provides an introduction to using transforms.
489	CSS Transitions	CSS, CSS Transitions, Overview, Reference
		CSS Transitions is a module of CSS that lets you create gradual transitions between the values of specific CSS properties. The behavior of these transitions can be controlled by specifying their timing function, duration, and other attributes.
490	Using CSS transitions	Advanced, CSS, CSS Transitions, CSS3 Transitions, Guide
		CSS transitions provide a way to control animation speed when changing CSS properties. Instead of having property changes take effect immediately, you can cause the changes in a property to take place over a period of time.
491	CSS Tutorials	CSS, Guide, Junk, Tutorial
		Learning CSS may be a daunting task. In order to help you, we have written numerous tutorials about CSS. Some are aimed at complete beginners, while others present complex features to be used by more experienced users.
492	CSS Writing Modes	CSS, CSS Writing Modes, Overview, Reference
		CSS Writing Modes is a CSS module that defines various international writing modes, such as left-to-right (e.g. used by Latin and Indic scripts), right-to-left (e.g. used by Hebrew or Arabic scripts), bidirectional (used when mixing left-to-right and right-to-left scripts) and vertical (e.g. used by some Asian scripts).
493	CSS basic data types	CSS, CSS Data Type, Overview, Reference
		CSS basic data types define typical values (including keywords and units) accepted by CSS properties and functions. They are a special kind of component value type.
494	CSS documentation index	CSS
		Found 904 pages:
495	CSS reference	CSS, Overview, Reference, l10n:priority
		Use this CSS reference to browse an alphabetical index of all the standard CSS properties, pseudo-classes, pseudo-elements, data types, and at-rules. You can also browse a list of all the CSS selectors organized by type and a list of key CSS concepts. Also included is a brief DOM-CSS / CSSOM reference.
496	CSS selectors	CSS, CSS Selectors, Overview, Reference, Selectors
		CSS selectors define the elements to which a set of CSS rules apply.
497	Comparison of CSS Selectors and XPath	CSS, Draft, NeedsContent, Reference, XPath
		This article seeks to document the difference between CSS Selectors and XPath for web developers to be able to better choose the right tool for the right job.
498	Using the :target pseudo-class in selectors	:target, CSS, Guide, Reference, Selectors
		When a URL points at a specific piece of a document, it can be difficult for the user to notice. Find out how you can use some simple CSS to draw attention to the target of a URL and improve the user's experience.
499	CSS3	CSS, NeedsUpdate, Reference
		CSS3 is the latest evolution of the Cascading Style Sheets language and aims at extending CSS2.1. It brings a lot of long-awaited novelties, like rounded corners, shadows, gradients, transitions or animations, as well as new layouts like multi-columns, flexible box or grid layouts.
500	CSSOM View	CSS, CSSOM, CSSOM View, Layout, Overview, Reference
		CSSOM View is a module of CSS that lets you manipulate the visual view of a document, in particular its scrolling behavior.
501	Coordinate systems	CSS, CSSOM, CSSOM View, Coordinate systems, Coordinates, Guide, Layout, NeedsContent
		When specifying the location of a pixel in a graphics context (just like when specifying coordinate systems in algebra), its position is defined relative to a fixed point in the context. This fixed point is called the origin. The position is specified as the number of pixels offset from the origin along each dimension of the context.
502	Child combinator	CSS, Reference, Selectors
		The child combinator (>) is placed between two CSS selectors. It matches only those elements matched by the second selector that are the children of elements matched by the first.
503	Class selectors	CSS, Reference, Selectors
		The CSS class selector matches elements based on the contents of their class attribute.
504	Column combinator	CSS, Draft, Reference, Selectors, Tables
		The column combinator (||) is placed between two CSS selectors. It matches only those elements matched by the second selector that belong to the column elements matched by the first.
505	Comments	CSS, Reference
		A CSS comment is used to add explanatory notes to the code or to prevent the browser from interpreting specific parts of the style sheet. By design, comments have no effect on the layout of a document.
506	Compositing and Blending	CSS, Compositing and Blending, Overview, Reference
		Compositing and Blending is a CSS module that defines how shapes of different elements are combined into a single image.
507	Computed value	CSS, Reference
		The computed value of a CSS property is the value that is transferred from parent to child during inheritance.
508	Custom properties (--*): CSS variables	CSS, CSS Variables, Experimental, Reference
		Property names that are prefixed with --, like --example-name, represent custom properties that contain a value that can be reused throughout the document using the (var()) function.
509	Descendant combinator	CSS, Reference, Selectors
		The descendant combinator — typically represented by a single space ( ) character — combines two selectors such that elements matched by the second selector are selected if they have an ancestor element matching the first selector. Selectors that utilize a descendant combinator are called descendant selectors.
510	Draft Implementations of CSS Features	CSS, Junk, Reference
		Mozilla supports a number of extensions to CSS that are prefixed with -moz-. The following list contains all Mozilla extensions that are implementations of features that are being standardized by the W3C. Proprietary features are omitted.
511	Filter Effects	CSS, Filter Effects, Overview, Reference
		Filter Effects is a module of CSS that defines a way of processing an element’s rendering before it is displayed in the document.
512	General sibling combinator	CSS, Reference, Selectors
		The general sibling combinator (~) separates two selectors and matches the second element only if it follows the first element (though not necessarily immediately), and both are children of the same parent element.
513	ID selectors	CSS, Reference, Selectors
		In an HTML document, the CSS ID selector matches an element based on the value of its id attribute. The selected element's ID attribute must match exactly the value given in the selector.
514	Inheritance	CSS, Guide, Inheritance, Layout, Web
		In CSS, inheritance controls what happens when no value is specified for a property on an element. Refer to any CSS property definition to see whether a specific property inherits by default ("Inherited: yes") or not ("Inherited: no").
515	Initial value	CSS, Reference
		The initial value of a CSS property is its default value, as listed in its definition table.
516	Introducing the CSS Cascade	CSS, Cascade, Guide, Introduction, Layout, Reference, Style, Style sheet, Stylesheets
		This article explains what the cascade is, the order in which CSS declarations cascade, and how this affects you, the web developer.
517	Layout and the containing block	CSS, CSS Position, Containers, Guide, Layout, Position, Style, blocks, containing block, size
		In this article, we examine the factors that an element's containing block.
518	Layout mode	CSS, Layout, Reference
		A CSS layout mode, sometimes simply called layout, is an algorithm that determines the position and size of boxes based on the way they interact with their sibling and ancestor boxes. There are several of them:
519	List of Proprietary CSS Features	CSS, Junk
		This list includes proprietary extensions to CSS in different browser engines which are not experimental implementations of features being standardized (see Draft Implementations of CSS Features for a list of these).
520	Media queries	CSS, CSS3 Media Queries, Media Queries, Overview, Reference, Responsive Design
		Media queries let you adapt your site or app depending on the presence or value of various device characteristics and parameters.
521	Testing media queries programmatically	Advanced, CSS, DOM, Guide, JavaScript, Media Queries, MediaQueryList, Responsive Design, Web, matchMedia
		The DOM provides features that can test the results of a media query programmatically, via the MediaQueryList interface and its methods and properties. Once you've created a MediaQueryList object, you can check the result of the query or receive notifications when the result changes.
522	Using media queries	Advanced, CSS, Guide, Media, Media Queries, Responsive Design, Web
		Media queries are useful when you want to modify your site or app depending on a device's general type (such as print vs. screen) or specific characteristics and parameters (such as screen resolution or browser viewport width).
523	Microsoft CSS extensions	CSS, CSS:Microsoft Extensions, Non-standard, Overview, Reference
		Microsoft applications such as Edge and Internet Explorer support a number of special Microsoft extensions to CSS. These extensions are prefixed with -ms-.
524	Motion Path	CSS, Experimental, Motion Path, Overview, Reference
		Motion Path is a CSS module that allows authors to animate any graphical object along a custom path.
525	Mozilla CSS extensions	CSS, CSS:Mozilla Extensions, Non-standard, Overview, Reference
		Mozilla applications such as Firefox support a number of special Mozilla extensions to CSS, including properties, values, pseudo-elements and pseudo-classes, at-rules, and media queries.
526	Mozilla CSS support chart	CSS, Junk, Reference
		This page lists supported CSS selectors, properties, @-rules, Media queries and values in alphabetical order.
527	Paged media	CSS, Page Breaks, Reference
		Paged media properties control the presentation of content for print or any other media that splits content into discrete pages. It allows you to set page breaks, control printable area, style left and right pages differently, and control breaks inside elements. Widely supported properties include:
528	Privacy and the :visited selector	CSS, Guide, Pseudo-class, Reference, Security, Selectors
		Before about 2010, the CSS :visited selector allowed websites to uncover a user's browsing history and figure out what sites the user had visited. This was done through window.getComputedStyle and other techniques. This process was quick to execute, and made it possible not only to determine where the user had been on the web, but could also be used to guess a lot of information about the user's identity.
529	Pseudo-classes	CSS, CSS Selectors, Overview, Pseudo-class, Reference
		A CSS pseudo-class is a keyword added to a selector that specifies a special state of the selected element(s). For example, :hover can be used to change a button's color when the user hovers over it.
530	Pseudo-elements	CSS, CSS Selectors, Overview, Pseudo-element, Reference
		A CSS pseudo-element is a keyword added to a selector that lets you style a specific part of the selected element(s). For example, ::first-line can be used to change the font of the first line of a paragraph.
531	Questions about CSS	Beginner, CSS, Draft, Junk, NeedsContent, NeedsHelp
		Cascading Style Sheets (CSS) is a rule-based language allowing developers to define styles to apply to HTML elements (or other markup structures).
532	Replaced element	CSS, Layout, Reference, css layout, rendering, replaced element
		In CSS, a replaced element is an element whose representation is outside the scope of CSS; they're external objects whose representation is independent of the CSS formatting model.
533	Resolved value	CSS, Reference
		The resolved value of a CSS property is the value returned by getComputedStyle().
534	Scaling of SVG backgrounds	CSS, CSS Background, Guide, Images, Reference, SVG
		Given the flexibility of SVG images, there's a lot to keep in mind when using them as background images with the background-image property, and even more to keep in mind when also scaling them using the background-size property. This article describes how scaling of SVG images is handled when using these properties.
535	Shorthand properties	CSS, Guide, Layout, Reference, Shorthand Properties, properties, shorthand
		Shorthand properties are CSS properties that let you set the values of multiple other CSS properties simultaneously. Using a shorthand property, you can write more concise (and often more readable) style sheets, saving time and energy.
536	Specificity	CSS, Example, Guide, Reference, Web
		Specificity is the means by which browsers decide which CSS property values are the most relevant to an element and, therefore, will be applied. Specificity is based on the matching rules which are composed of different sorts of CSS selectors.
537	Specified value	CSS, Reference
		The specified value of a CSS property is the value it receives from the document's style sheet.
538	Syntax	CSS, Guide, Reference, Web
		The basic goal of the Cascading Stylesheet (CSS) language is to allow a browser engine to paint elements of the page with specific features, like colors, positioning, or decorations. The CSS syntax reflects this goal and its basic building blocks are:
539	Tools	CSS, NeedsUpdate
		CSS offers a number of powerful features that can be tricky to use, or have a number of parameters, so that it's helpful to be able to visualize them while you work on them. This page offers links to a number of useful tools that will help you build the CSS to style your content using these features.
540	Cubic Bezier Generator	CSS, Tools
		This is a sample tool; it lets you edit Bezier curves. This is not really yet a useful tool, but will be!
541	Linear-gradient Generator	CSS, Tools
		This tool can be used to create custom CSS3 linear-gradient() backgrounds.
542	Type selectors	CSS, HTML, Node, Reference, Selectors
		The CSS type selector matches elements by node name. In other words, it selects all elements of the given type within a document.
543	Universal selectors	CSS, Reference, Selectors
		The CSS universal selector (*) matches elements of any type.
544	Used value	CSS, Reference
		The used value of a CSS property is its value after all calculations have been performed on the computed value.
545	Using CSS custom properties (variables)	CSS, CSS Variables, Guide, Web
		CSS variables are entities defined by CSS authors that contain specific values to be reused throughout a document. They are set using custom property notation (e.g. --main-color: black;) and are accessed using the var() function (e.g., color: var(--main-color);) .
546	Value definition syntax	CSS, Reference
		No summary!
547	Visual formatting model	CSS, CSS Box Model, NeedsUpdate, Reference
		The CSS visual formatting model is an algorithm that processes a document and displays it on visual media. This model is a basic concept of CSS.
548	WebKit CSS extensions	CSS, Non-standard, Reference, WebKit
		Applications based on WebKit or Blink, such as Safari and Chrome, support a number of special WebKit extensions to CSS. These extensions are generally prefixed with -webkit. All -webkit prefixed properties also work with an -apple prefix. A few are prefixed with -epub.
549	align-content	CSS, CSS Box Alignment, CSS Property, Reference
		The CSS align-content property defines how the browser distributes space between and around content items along the cross-axis of their container, which is serving as a flexbox container.
550	align-items	CSS, CSS Flexible Boxes, CSS Property, Reference
		The CSS align-items property sets the align-self value on all direct children as a group. The align-self property sets the alignment of an item within its containing block.
551	align-self	CSS, CSS Box Alignment, CSS Flexible Boxes, CSS Property, Reference
		The align-self CSS property aligns flex items of the current flex line overriding the align-items value. If any of the item's cross-axis margin is set to auto, then align-self is ignored.
552	all	CSS, CSS Cascade, CSS Property, Reference
		The all CSS shorthand property sets all of an element's properties (other than unicode-bidi and direction) to their initial or inherited values, or to the values specified in another stylesheet origin.
553	animation	CSS, CSS Animations, CSS Property, Reference
		The animation CSS property is a shorthand property for the various animation properties: animation-name, animation-duration, animation-timing-function, animation-delay, animation-iteration-count, animation-direction, animation-fill-mode, and animation-play-state.
554	animation-delay	CSS, CSS Animations, CSS Property, Reference
		The animation-delay CSS property specifies when an animation should start. You can begin the animation at a future point in time, immediately and from its beginning, or immediately and partway through the animation cycle.
555	animation-direction	CSS, CSS Animations, CSS Property, Reference
		The animation-direction CSS property specifies whether an animation should play forwards, backwards, or alternating back and forth.
556	animation-duration	CSS, CSS Animations, CSS Property, Reference
		The animation-duration CSS property specifies the length of time that an animation should take to complete one cycle.
557	animation-fill-mode	CSS, CSS Animations, CSS Property, Reference
		The animation-fill-mode CSS property specifies how a CSS animation should apply styles to its target before and after its execution.
558	animation-iteration-count	CSS, CSS Animations, CSS Property, CSS Property Animations
		The animation-iteration-count CSS property specifies the number of times an animation cycle should be played before stopping. If multiple values are specified, each time the animation is played the next value in the list is used, cycling back to the first value after the last one is used.
559	animation-name	CSS, CSS Animations, CSS Property, Reference
		The animation-name CSS property specifies one or more animations that should be applied to an element. Each name indicates an @keyframes at-rule that defines the property values for the animation sequence.
560	animation-play-state	CSS, CSS Animations, CSS Property, Reference
		The animation-play-state CSS property specifies whether an animation is running or paused. In JavaScript, this can be queried to determine whether or not the animation is currently running. In addition, you can use JavaScript to set its value to pause or resume playback of an animation.
561	animation-timing-function	CSS, CSS Animations, CSS Property, Reference
		The animation-timing-function CSS property specifies how a CSS animation should progress over the duration of each cycle.
562	appearance (-moz-appearance, -webkit-appearance)	-moz-appearance, -webkit-appearance, CSS, CSS Property, Experimental, Reference, appearance
		The -moz-appearance CSS property is used in Gecko (Firefox) to display an element using platform-native styling based on the operating system's theme.
563	attr	CSS, CSS Function, Layout, Reference, Web
		The attr() CSS function is used to retrieve the value of an attribute of the selected element and use it in the style sheet. It can also be used on pseudo-elements, in which case the value of the attribute on the pseudo-element's originating element is returned.
564	aural	CSS, Deprecated, Reference
		The aural CSS media type is used for devices that have speech output capabilities.
565	azimuth	CSS, CSS Property, Deprecated, NeedsBrowserCompatibility, NeedsMobileBrowserCompatibility, NeedsUpdate, Reference
		In combination with elevation, the azimuth CSS property enables different audio sources to be positioned spatially for aural presentation. This is important in that it provides a natural way to tell several voices apart, as each can be positioned to originate at a different location on the sound stage. Stereo output produce a lateral sound stage, while binaural headphones and multi-speaker setups allow for a fully three-dimensional stage.
566	backdrop-filter	CSS, CSS Property, Graphics, Layout, NeedsContent, Reference, SVG, SVG Filter, Web
		The backdrop-filter CSS property lets you apply graphical effects such as blurring or color shifting to the area behind an element. Because it applies to everything behind the element, to see the effect you must make the element or its background at least partially transparent.
567	backface-visibility	CSS, CSS Property, CSS Transforms, Experimental, Reference
		The backface-visibility CSS property determines whether the back face of an element is visible when turned towards the user.
568	background	CSS, CSS Background, CSS Property, Reference
		The background CSS property is a short way to declare all background style options at once, including color, image, origin and size, repeat method, and other features.
569	background-attachment	CSS, CSS Background, CSS Property, Reference
		If a background-image is specified, the background-attachment CSS property determines whether that image's position is fixed within the viewport, or scrolls along with its containing block.
570	background-blend-mode	CSS, CSS Property, Compositing and Blending
		The background-blend-mode CSS property determines how an element's background images should blend with each other and with the element's background color.
571	background-clip	CSS, CSS Background, CSS Property, Reference
		The background-clip CSS property specifies if an element's background, whether a <color> or an <image>, extends underneath its border.
572	background-color	CSS, CSS Background, CSS Property, Graphics, HTML Colors, HTML Styles, Layout, Reference, Styles, Styling HTML, background-color
		The background-color CSS property sets the background color of an element.
573	background-image	CSS, CSS Background, CSS Property, Reference
		The background-image CSS property sets one or more background images on an element.
574	background-origin	CSS, CSS Background, CSS Property, Reference
		The background-origin CSS property sets the background positioning area, i.e., the origin position of an image specified using the background-image property.
575	background-position	CSS, CSS Background, CSS Property, Reference
		The background-position CSS property sets the initial position, relative to the background position layer defined by background-origin, for each defined background image.
576	background-position-x	CSS, CSS Background, CSS Property, Experimental, Reference
		The background-position-x CSS property sets the initial horizontal position, relative to the background position layer defined by background-origin, for each defined background image.
577	background-position-y	CSS, CSS Background, CSS Property, Experimental, Reference
		The background-position-y CSS property sets the initial vertical position, relative to the background position layer defined by background-origin, for each defined background image.
578	background-repeat	CSS, CSS Background, CSS Property, Reference
		The background-repeat CSS property defines how background images are repeated. A background image can be repeated along the horizontal axis, the vertical axis, both axes, or not repeated at all.
579	background-size	CSS, CSS Background, CSS Property, Reference
		The background-size CSS property specifies the size of the element's background image. The image can be left to its natural size, stretched to a new size, or constrained to fit the available space while preserving its intrinsic proportions.
580	block-size	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The block-size CSS property defines the horizontal or vertical size of an element's block, depending on its writing mode. It corresponds to either the width or the height property, depending on the value of writing-mode.
581	border	CSS, CSS Borders, CSS Property, Layout, Reference
		The border CSS property is a shorthand for setting all individual border property values in a single declaration: border-width, border-style, and border-color.
582	border-block-end	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-block-end CSS property is a shorthand property for setting the individual logical block-end border property values in a single place in the style sheet.
583	border-block-end-color	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-block-end-color CSS property defines the color of the logical block-end border of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-color, border-right-color, border-bottom-color, or border-left-color property depending on the values defined for writing-mode, direction, and text-orientation.
584	border-block-end-style	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-block-end-style CSS property defines the style of the logical block end border of an element, which maps to a physical border style depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-style, border-right-style, border-bottom-style, or border-left-style property depending on the values defined for writing-mode, direction, and text-orientation.
585	border-block-end-width	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-block-end-width CSS property defines the width of the logical block-end border of an element, which maps to a physical border width depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-width, border-right-width, border-bottom-width, or border-left-width property depending on the values defined for writing-mode, direction, and text-orientation.
586	border-block-start	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-block-start CSS property is a shorthand property for setting the individual logical block-start border property values in a single place in the style sheet.
587	border-block-start-color	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-block-start-color CSS property defines the color of the logical block-start border of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-color, border-right-color, border-bottom-color, or border-left-color property depending on the values defined for writing-mode, direction, and text-orientation.
588	border-block-start-style	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-block-start-style CSS property defines the style of the logical block start border of an element, which maps to a physical border style depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-style, border-right-style, border-bottom-style, or border-left-style property depending on the values defined for writing-mode, direction, and text-orientation.
589	border-block-start-width	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-block-start-width CSS property defines the width of the logical block-start border of an element, which maps to a physical border width depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-width, border-right-width, border-bottom-width, or border-left-width property depending on the values defined for writing-mode, direction, and text-orientation.
590	border-bottom	CSS, CSS Borders, CSS Property, Reference
		The border-bottom CSS property is a shorthand that sets the values of border-bottom-width, border-bottom-style and border-bottom-color. These properties describe an element's bottom border.
591	border-bottom-color	CSS, CSS Borders, CSS Property, Reference
		The border-bottom-color CSS property sets the color of an element's bottom border. Note that in many cases the shorthand CSS properties border-color or border-bottom are more convenient and preferable.
592	border-bottom-left-radius	CSS, CSS Borders, CSS Property, Reference
		The border-bottom-left-radius CSS property sets the rounding of the bottom-left corner of the element.
593	border-bottom-right-radius	CSS, CSS Borders, CSS Property, Reference
		The border-bottom-right-radius CSS property sets the rounding of the bottom-right corner of the element.
594	border-bottom-style	CSS, CSS Borders, CSS Property, Reference
		The border-bottom-style CSS property sets the line style of an element's bottom border.
595	border-bottom-width	CSS, CSS Borders, CSS Property, Reference
		The border-bottom-width CSS property sets the width of the bottom border of a box.
596	border-collapse	CSS, CSS Borders, CSS Property, CSS Tables, Reference
		The border-collapse CSS property specifies whether cells inside a <table> have shared or separate borders.
597	border-color	CSS, CSS Borders, CSS Property, CSS Styles, HTML Colors, Reference, Styling HTML, border-color, borders, colors
		The border-color CSS property is a shorthand property for setting the colors on all four sides of an element's border.
598	border-image	CSS, CSS Borders, CSS Property, Reference
		The border-image CSS property lets you draw an image in place of an element's border-style.
599	border-image-outset	CSS, CSS Borders, CSS Property, Reference
		The border-image-outset CSS property specifies the distance by which an element's border image is set out from its border box.
600	border-image-repeat	CSS, CSS Borders, CSS Property, Reference
		The border-image-repeat CSS property defines how the edge regions of a source image are adjusted to fit the dimensions of an element's border image.
601	border-image-slice	CSS, CSS Borders, CSS Property, NeedsExample, Reference
		The border-image-slice CSS property divides the image specified by border-image-source into regions. These regions are used to form the components of an element's border image.
602	border-image-source	CSS, CSS Borders, CSS Property, Reference
		The border-image-source CSS property specifies the source image used to create an element's border image.
603	border-image-width	CSS, CSS Borders, CSS Property, Reference
		The border-image-width CSS property specifies the width of an element's border image.
604	border-inline-end	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-inline-end CSS property is a shorthand property for setting the individual logical inline-end border property values in a single place in the style sheet.
605	border-inline-end-color	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-inline-end-color CSS property defines the color of the logical inline-end border of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-color, border-right-color, border-bottom-color, or border-left-color property depending on the values defined for writing-mode, direction, and text-orientation.
606	border-inline-end-style	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-inline-end-style CSS property defines the style of the logical inline end border of an element, which maps to a physical border style depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-style, border-right-style, border-bottom-style, or border-left-style property depending on the values defined for writing-mode, direction, and text-orientation.
607	border-inline-end-width	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-inline-end-width CSS property defines the width of the logical inline-end border of an element, which maps to a physical border width depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-width, border-right-width, border-bottom-width, or border-left-width property depending on the values defined for writing-mode, direction, and text-orientation.
608	border-inline-start	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-inline-start CSS property is a shorthand property for setting the individual logical inline-start border property values in a single place in the style sheet.
609	border-inline-start-color	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-inline-start-color CSS property defines the color of the logical inline start border of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-color, border-right-color, border-bottom-color, or border-left-color property depending on the values defined for writing-mode, direction, and text-orientation.
610	border-inline-start-style	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-inline-start-style CSS property defines the style of the logical inline start border of an element, which maps to a physical border style depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-style, border-right-style, border-bottom-style, or border-left-style property depending on the values defined for writing-mode, direction, and text-orientation.
611	border-inline-start-width	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The border-inline-start-width CSS property defines the width of the logical inline-start border of an element, which maps to a physical border width depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-width, border-right-width, border-bottom-width, or border-left-width property depending on the values defined for writing-mode, direction, and text-orientation.
612	border-left	CSS, CSS Borders, CSS Property, Reference
		The border-left CSS property is a shorthand that sets the values of border-left-width, border-left-style, and border-left-color. These properties describe an element's left border.
613	border-left-color	CSS, CSS Borders, CSS Property, Reference
		The border-left-color CSS property sets the color of an element's left border. Note that in many cases the shorthand CSS properties border-color or border-left are more convenient and preferable.
614	border-left-style	CSS, CSS Borders, CSS Property, Reference
		The border-left-style CSS property sets the line style of an element's left border.
615	border-left-width	CSS, CSS Borders, CSS Property, Reference
		The border-left-width CSS property sets the width of the left border of a box.
616	border-radius	CSS, CSS Borders, CSS Property, Reference
		The border-radius CSS property lets you round the corners of an element's outer border edge. You can specify a single radius to make circular corners, or two radii to make elliptical corners.
617	border-right	CSS, CSS Borders, CSS Property, Reference
		The border-right CSS property is a shorthand that sets the values of border-right-width, border-right-style, and border-right-color. These properties describe an element's right border.
618	border-right-color	CSS, CSS Borders, CSS Property, Reference
		The border-right-color CSS property sets the color of an element's right border. Note that in many cases the shorthand CSS properties  border-color or border-right are more convenient and preferable.
619	border-right-style	CSS, CSS Borders, CSS Property, Reference
		The border-right-style CSS property sets the line style of an element's right border.
620	border-right-width	CSS, CSS Borders, CSS Property, Reference
		The border-right-width CSS property sets the width of the right border of a box.
621	border-spacing	CSS, CSS Property, CSS Tables, Reference
		The border-spacing CSS property specifies the distance between the borders of adjacent <table> cells. This property applies only when border-collapse is separate.
622	border-style	CSS, CSS Borders, CSS Property, Reference
		The border-style CSS property is a shorthand property that sets the line style for all four sides of an element's border.
623	border-top	CSS, CSS Borders, CSS Property, Reference
		The border-top CSS property is a shorthand that sets the values of border-top-width, border-top-style, and border-top-color. These properties describe an element's top border.
624	border-top-color	CSS, CSS Borders, CSS Property, Reference
		The border-top-color CSS property sets the color of an element's top border. Note that in many cases the shorthand CSS properties border-color or border-top are more convenient and preferable.
625	border-top-left-radius	CSS, CSS Borders, CSS Property, Reference
		The border-top-left-radius CSS property sets the rounding of the top-left corner of the element.
626	border-top-right-radius	CSS, CSS Borders, CSS Property, Reference
		The border-top-right-radius CSS property sets the rounding of the top-right corner of the element.
627	border-top-style	CSS, CSS Borders, CSS Property, Reference
		The border-top-style CSS property sets the line style of an element's top border.
628	border-top-width	CSS, CSS Borders, CSS Property, Reference
		The border-top-width CSS property sets the width of the top border of a box.
629	border-width	CSS, CSS Borders, CSS Property, Reference
		The border-width CSS property is a shorthand property for setting the widths on all four sides of an element's border.
630	bottom	CSS, CSS Positioning, CSS Property, Reference
		The bottom CSS property participates in specifying the vertical position of a positioned element. It has no effect on non-positioned elements.
631	box-align	CSS, CSS Property, NeedsUpdate, Non-standard, Reference
		The box-align CSS property specifies how an element aligns its contents across its layout in a perpendicular direction. The effect of the property is only visible if there is extra space in the box.
632	box-decoration-break	CSS, CSS Fragmentation, CSS Property, Experimental, Reference
		The box-decoration-break CSS property specifies how an element's fragments should be rendered when broken across multiple lines, columns, or pages.
633	box-direction	CSS, Non-standard, Reference
		The box-direction CSS property specifies whether a box lays out its contents normally (from the top or left edge), or in reverse (from the bottom or right edge).
634	box-flex	CSS, CSS Property, Non-standard, Reference
		This is a property for controlling parts of the XUL box model. It does not match either the old CSS Flexible Box Layout Module drafts for 'box-flex' (which were based on this property) or the behavior of '-webkit-box-flex' (which is based on those drafts). See flexbox for information about the current standard.
635	box-flex-group	CSS, CSS Property, Non-standard, Reference
		This is a property of the original CSS Flexible Box Layout Module draft, and has been replaced by a newer standard. See flexbox for information about the current standard.
636	box-lines	CSS, CSS Property, NeedsBrowserCompatibility, NeedsMobileBrowserCompatibility, Non-standard, Reference
		This is a property of the original CSS Flexible Box Layout Module draft, and has been replaced by a newer standard. See flexbox for information about the current standard.
637	box-ordinal-group	CSS, CSS Property, Non-standard, Reference
		This is a property of the original CSS Flexible Box Layout Module draft, and has been replaced by a newer standard. See flexbox for information about the current standard.
638	box-orient	CSS, Non-standard, Reference
		This is a property of the original CSS Flexible Box Layout Module draft, and has been replaced by a newer standard. See flexbox for information about the current standard.
639	box-pack	CSS, CSS Property, Non-standard, Reference
		This is a property of the original CSS Flexible Box Layout Module draft, and has been replaced by a newer standard. See flexbox for information about the current standard.
640	box-shadow	CSS, CSS Backgrounds and Borders, CSS Property, CSS Styles, HTML Colors, Reference, Shadows, Styles, Styling HTML, box-shadow
		The box-shadow CSS property is used to add shadow effects around an element's frame. You can specify multiple effects separated by commas if you wish to do so.
641	box-sizing	CSS, CSS Property, Reference
		The box-sizing CSS property defines how the user agent should calculate the total width and height of an element.
642	break-after	CSS, CSS Fragmentation, CSS Multi-column Layout, CSS Property, NeedsExample, Reference
		The break-after CSS property defines how page, column, or region breaks should behave after a generated box. If there is no generated box, the property is ignored.
643	break-before	CSS, CSS Fragmentation, CSS Multi-column Layout, CSS Property, NeedsExample, Reference
		The break-before CSS property defines how page, column, or region breaks should behave before a generated box. If there is no generated box, the property is ignored.
644	break-inside	CSS, CSS Fragmentation, CSS Multi-column Layout, CSS Property, NeedsExample, Reference
		The break-inside CSS property defines how page, column, or region breaks should behave inside a generated box. If there is no generated box, the property is ignored.
645	calc()	CSS, CSS Function, Calculate, Compute, Function, Layout, Reference, Web, calc
		The calc() CSS function lets you perform calculations when specifying CSS property values. It can be used anywhere a <length>, <frequency>, <angle>, <time>, <percentage>, <number>, or <integer> is allowed.
646	caption-side	CSS, CSS Property, CSS Tables, Reference
		The caption-side CSS property puts the content of a table's <caption> on the specified side. The values are relative to the writing-mode of the table.
647	caret-color	CSS, CSS Property, CSS User Interace, Editing, HTML Colors, Input, Reference, Styling HTML, Text Editing, caret, caret-color, contenteditable
		The caret-color CSS property sets the color of the insertion caret — the visible indicator of the point at which the next character typed by the user will be inserted — within an element such as <input> or one with the contenteditable attribute set.
648	clear	CSS, CSS Positioning, CSS Property, Reference
		The clear CSS property specifies whether an element can be next to floating elements that precede it or must be moved down (cleared) below them. The clear property applies to both floating and non-floating elements.
649	clip	CSS, CSS Masking, CSS Property, Deprecated, Reference
		The clip CSS property defines what portion of an element is visible. The clip property applies only to absolutely positioned elements, that is elements with position:absolute or position:fixed.
650	clip-path	CSS, CSS Masking, CSS Property, Experimental, Reference, Web
		The clip-path CSS property creates a clipping region that defines what part of an element should be displayed. More specifically, those portions that are inside the region are shown, while those outside are hidden.
651	color	CSS, CSS Colors, CSS Property, CSS Text, HTML Colors, HTML Styles, Layout, Reference, Styling HTML, Styling text, Web, color
		The color CSS attribute sets the foreground color value of an element's text content and text decorations. It also sets the currentcolor value, which may be used as an indirect value on other properties, and is the default for other color properties, such as border-color.
652	color-adjust	Adjusting Colors, CSS, CSS Colors, CSS Property, HTML Colors, HTML Styles, Layout, Non-standard, Reference, Styling HTML, Styling text, Web, color-adjust
		The color-adjust CSS property gives the web author control over what if anything the user agent may do to optimize the appearance of the element on the output device.
653	column-count	CSS, CSS Multi-column Layout, CSS Property, Reference
		The column-count CSS property breaks an element's content into the specified number of columns.
654	column-fill	CSS, CSS Multi-column Layout, CSS Property, Reference
		The column-fill CSS property controls how an element's contents are balanced when broken into columns.
655	column-gap (grid-column-gap)	CSS, CSS Flexible Boxes, CSS Grid, CSS Multi-column Layout, CSS Property, Reference, column-gap
		The column-gap CSS property sets the size of the gap (gutter) between an element's columns.
656	column-rule	CSS, CSS Multi-column Layout, CSS Property, Reference
		The column-rule CSS property sets the width, style, and color of the rule (line) drawn between columns in a multi-column layout.
657	column-rule-color	CSS, CSS Multi-column Layout, CSS Property, HTML Colors, Reference, Styles, Styling HTML, column-rule-color, columns
		The column-rule-color CSS property sets the color of the rule (line) drawn between columns in a multi-column layout.
658	column-rule-style	CSS, CSS Multi-column Layout, CSS Property, Reference
		The column-rule-style CSS property sets the style of the rule (line) drawn between columns in a multi-column layout.
659	column-rule-width	CSS, CSS Multi-column Layout, CSS Property, Reference
		The column-rule-width CSS property sets the width of the rule (line) drawn between columns in a multi-column layout.
660	column-span	CSS, CSS Multi-column Layout, CSS Property, Reference
		The column-span CSS property makes it possible for an element to span across all columns when its value is set to all.
661	column-width	CSS, CSS Multi-column Layout, CSS Property, Reference
		The column-width CSS property specifies the ideal column width in a multi-column layout. The container will have as many columns as can fit without any of them having a width less than the column-width value.  If the width of the container is narrower than the specified value, the single column's width will be smaller than the declared column width.
662	columns	CSS, CSS Multi-column Layout, CSS Property, Reference
		The columns CSS property sets the column width and column count of an element.
663	contain	CSS, CSS Containment, CSS Property, Experimental, Layout, NeedsExample, Paint, Reference, Style, Web
		The contain CSS property allows an author to indicate that an element and its contents are, as much as possible, independent of the rest of the document tree. This allows the browser to recalculate layout, style, paint, size, or any combination of them for a limited area of the DOM and not the entire page.
664	content	CSS, CSS Property, Generated Content, Reference
		The content CSS property is used to replace an element with a generated value. Objects inserted using the content property are anonymous replaced elements.
665	counter-increment	CSS, CSS Lists, CSS Property, Reference
		The counter-increment CSS property increases or decreases the value of a CSS counter by a given value.
666	counter-reset	CSS, CSS Lists, CSS Property, Reference
		The counter-reset CSS property resets a CSS counter to a given value.
667	cursor	CSS, CSS Property, Cursor, Reference
		The cursor CSS property specifies which mouse cursor to display when the mouse pointer is over an element.
668	direction	BiDi, CSS, CSS Property, Reference
		The direction CSS property sets the direction of text, table columns, and horizontal overflow.
669	display	CSS, CSS Display, CSS Property, Reference, display
		The display CSS property defines the display type of an element, which consists of the two basic qualities of how an element generates boxes — the outer display type defining how the box participates in flow layout , and the inner display type defining how the children of the box are laid out.
670	element	CSS, CSS Function, CSS4-images, Layout, Reference, Web
		The element() CSS function defines an <image> value generated from an arbitrary HTML element. This image is live, meaning that if the HTML element is changed, the CSS properties using the resulting value are automatically updated.
671	empty-cells	CSS, CSS Property, CSS Tables, Reference
		The empty-cells CSS property specifies how the user agent should render borders and backgrounds around <table> cells that have no visible content.
672	env()	CSS, CSS Function, CSS Variables, Draft, Experimental, NeedsData.json, NeedsExample, Reference, Variables, env, env()
		The env() CSS function can be used to insert the value of an environment variable, which is global to a particular document, unlike custom property. The env() function can then be used to substitute the value into arbitrary locations, similar to the var() function.
673	filter	CSS, CSS Property, Reference, SVG, SVG Filter, filter
		The filter CSS property lets you apply graphical effects like blurring or color shifting to an element. Filters are commonly used to adjust the rendering of images, backgrounds, and borders.
674	fit-content()	CSS, CSS Function, CSS Grid, Experimental, Layout, Reference, Web
		The fit-content() CSS function clamps a given size to an available size according to the formula min(maximum size, max(minimum size, argument)).
675	flex	CSS, CSS Flexible Boxes, CSS Property, Reference
		The flex CSS property specifies how a flex item will grow or shrink so as to fit the space available in its flex container. This is a shorthand property that sets flex-grow, flex-shrink, and flex-basis.
676	flex-basis	CSS, CSS Flexible Boxes, CSS Property, Reference
		The flex-basis CSS property specifies the initial main size of a flex item. This property determines the size of the content-box unless specified otherwise using box-sizing.
677	flex-direction	CSS, CSS Flexible Boxes, CSS Property, Reference
		The flex-direction CSS property specifies how flex items are placed in the flex container defining the main axis and the direction (normal or reversed).
678	flex-flow	CSS, CSS Flexible Boxes, CSS Property, Reference
		The flex-flow CSS property is a shorthand property for flex-direction and flex-wrap individual properties.
679	flex-grow	CSS, CSS Flexible Boxes, CSS Property, NeedsContent, Reference
		The flex-grow CSS property specifies the flex grow factor of a flex item. It specifies how much of the available space in the flex container should be assigned to that item. If all sibling items have the same flex grow factor, then all items will receive the same share of available space, otherwise it is distributed according to the ratio defined by the different flex grow factors.
680	flex-shrink	CSS, CSS Flexible Boxes, CSS Property, NeedsContent, Reference
		The flex-shrink CSS property specifies the flex shrink factor of a flex item. Flex items will shrink to fill the container according to the flex-shrink number, when the default size of flex items is larger than the flex container.
681	flex-wrap	CSS, CSS Flexible Boxes, CSS Property, Reference
		The CSS flex-wrap property specifies whether flex items are forced into a single line or can be wrapped onto multiple lines. If wrapping is allowed, this property also enables you to control the direction in which lines are stacked.
682	float	CSS, CSS Positioning, CSS Property, Reference
		The float CSS property specifies that an element should be placed along the left or right side of its container, allowing text and inline elements to wrap around it. The element is removed from the normal flow of the web page, though still remaining a part of the flow (in contrast to absolute positioning).
683	font	CSS, CSS Fonts, CSS Property, Reference
		The font CSS property is either a shorthand property for setting font-style, font-variant, font-weight, font-size, line-height, and font-family; or a way to set the element's font to a system font, using specific keywords.
684	font-family	CSS, CSS Fonts, CSS Property, Reference
		The font-family CSS property specifies a prioritized list of one or more font family names and/or generic family names for the selected element.
685	font-feature-settings	CSS, CSS Fonts, CSS Property, Reference
		The font-feature-settings CSS property gives you control over advanced typographic features in OpenType fonts.
686	font-kerning	CSS, CSS Fonts, CSS Property, Reference
		The font-kerning CSS property controls the usage of the kerning information stored in a font.
687	font-language-override	CSS, CSS Fonts, CSS Property, Reference
		The font-language-override CSS property controls the usage of language-specific glyphs in a typeface.
688	font-optical-sizing	CSS, CSS Fonts, CSS Property, NeedsExample, Reference
		The font-optical-sizing CSS property allows developers to control whether browsers render text with slightly differing visual representations to optimize viewing at different sizes, or not. This only works for fonts that have an optical size variation axis.
689	font-size	CSS, CSS Fonts, CSS Property, Reference
		The font-size CSS property specifies the size of the font. Setting this property may change the size of other items, too, since it is used to compute the value of em, ex, and various other relative <length> units.
690	font-size-adjust	CSS, CSS Fonts, CSS Property, Reference
		The font-size-adjust CSS property specifies that the font size should be chosen based on the height of lowercase letters rather than the height of capital letters. This is useful since the legibility of fonts, especially at small sizes, is determined more by the size of lowercase letters than by the size of capital letters.
691	font-smooth	CSS, CSS Property, Non-standard, Reference
		The font-smooth CSS property controls the application of anti-aliasing when fonts are rendered.
692	font-stretch	CSS, CSS Fonts, CSS Property, Reference
		The font-stretch CSS property selects a normal, condensed, or expanded face from a font.
693	font-style	CSS, CSS Fonts, CSS Property, Reference, Web, font
		The font-style CSS property specifies whether a font should be styled with a normal, italic, or oblique face from its font-family.
694	font-synthesis	CSS, CSS Fonts, CSS Property, Reference
		The font-synthesis CSS property controls which missing typefaces, bold or italic, may be synthesized by the browser.
695	font-variant	CSS, CSS Fonts, CSS Property, Reference
		The font-variant CSS property is a shorthand for the longhand properties font-variant-caps, font-variant-numeric, font-variant-alternates, font-variant-ligatures, and font-variant-east-asian. You can also set the CSS Level 2 (Revision 1) values of font-variant, (that is, normal or small-caps), by using the font shorthand.
696	font-variant-alternates	CSS, CSS Fonts, CSS Property, Reference
		The font-variant-alternates CSS property controls the usage of alternate glyphs. These alternate glyphs may be referenced by alternative names defined in @font-feature-values.
697	font-variant-caps	CSS, CSS Fonts, CSS Property, Reference
		The font-variant-caps CSS property controls the usage of alternate glyphs for capital letters.
698	font-variant-east-asian	CSS, CSS Fonts, CSS Property, NeedsLiveSample, Reference
		The font-variant-east-asian CSS property controls the usage of alternate glyphs for East Asian scripts, like Japanese and Chinese.
699	font-variant-ligatures	CSS, CSS Fonts, CSS Property, NeedsLiveSample, Reference
		The font-variant-ligatures CSS property controls which ligatures and contextual forms are used in textual content of the elements it applies to. This leads to more harmonized forms in the resulting text.
700	font-variant-numeric	CSS, CSS Fonts, CSS Property, Reference
		The font-variant-numeric CSS property controls the usage of alternate glyphs for numbers, fractions, and ordinal markers.
701	font-variant-position	CSS, CSS Fonts, CSS Property, Reference
		The font-variant-position CSS property controls the usage of alternate, smaller glyphs that are positioned as superscript or subscript relative to the baseline of the font (which remains unchanged). These glyphs are likely to be used in <sub> and <sup> elements.
702	font-variation-settings	CSS, CSS Fonts, CSS Property, Non-standard, Reference
		The font-variation-settings CSS property provides low-level control over variable font characteristics, by specifying the four letter axis names of the characteristics you want to vary, along with their values.
703	font-weight	CSS, CSS Fonts, CSS Property, Reference
		The font-weight CSS property specifies the weight (or boldness) of the font. The font weights available to you will depend on the font-family you are using. Some fonts are only available in normal and bold.
704	gap (grid-gap)	CSS, CSS Flexible Boxes, CSS Grid, CSS Multi-column Layout, CSS Property, Reference, gap
		The gap CSS property specifies the gaps (gutters) between rows and columns. It is a shorthand for row-gap and column-gap.
705	grid	CSS, CSS Grid, CSS Property, Reference
		The grid CSS property is a shorthand property that sets all of the explicit grid properties (grid-template-rows, grid-template-columns, and grid-template-areas), and all the implicit grid properties (grid-auto-rows, grid-auto-columns, and grid-auto-flow), in a single declaration.
706	grid-area	CSS, CSS Grid, CSS Property, Reference
		The grid-area CSS property is a shorthand property for grid-row-start, grid-column-start, grid-row-end and grid-column-end, specifying a grid item’s size and location within the grid row by contributing a line, a span, or nothing (automatic) to its grid placement, thereby specifying the edges of its grid area.
707	grid-auto-columns	CSS, CSS Grid, CSS Property, Experimental, Reference
		The grid-auto-columns CSS property specifies the size of an implicitly-created grid column track.
708	grid-auto-flow	CSS, CSS Grid, CSS Property, Reference
		The grid-auto-flow CSS property controls how the auto-placement algorithm works, specifying exactly how auto-placed items get flowed into the grid.
709	grid-auto-rows	CSS, CSS Grid, CSS Property, Reference
		The grid-auto-rows CSS property specifies the size of an implicitly-created grid row track.
710	grid-column	CSS, CSS Grid, CSS Property, Reference
		The grid-column CSS property is a shorthand property for grid-column-start and grid-column-end specifying a grid item's size and location within the grid column by contributing a line, a span, or nothing (automatic) to its grid placement, thereby specifying the inline-start and inline-end edge of its grid area.
711	grid-column-end	CSS, CSS Grid, CSS Property, Reference
		The grid-column-end CSS property specifies a grid item’s end position within the grid column by contributing a line, a span, or nothing (automatic) to its grid placement, thereby specifying the block-end edge of its grid area.
712	grid-column-start	CSS, CSS Grid, CSS Property, Reference
		The grid-column-start CSS property specifies a grid item’s start position within the grid column by contributing a line, a span, or nothing (automatic) to its grid placement. This start position defines the block-start edge of the grid area.
713	grid-row	CSS, CSS Grid, CSS Property, Reference
		The grid-row CSS property is a shorthand property for grid-row-start and grid-row-end specifying a grid item’s size and location within the grid row by contributing a line, a span, or nothing (automatic) to its grid placement, thereby specifying the inline-start and inline-end edge of its grid area.
714	grid-row-end	CSS, CSS Grid, CSS Property, Reference
		The grid-row-end CSS property specifies a grid item’s end position within the grid row by contributing a line, a span, or nothing (automatic) to its grid placement, thereby specifying the inline-end edge of its grid area.
715	grid-row-start	CSS, CSS Grid, CSS Property, Reference
		The grid-row-start CSS property specifies a grid item’s start position within the grid row by contributing a line, a span, or nothing (automatic) to its grid placement, thereby specifying the inline-start edge of its grid area.
716	grid-template	CSS, CSS Grid, CSS Property, Reference
		The grid-template CSS property is a shorthand property for defining grid columns, rows, and areas.
717	grid-template-areas	CSS, CSS Grid, CSS Property, Reference
		The grid-template-areas CSS property specifies named grid areas.
718	grid-template-columns	CSS, CSS Grid, CSS Property, Reference
		The grid-template-columns CSS property defines the line names and track sizing functions of the grid columns.
719	grid-template-rows	CSS, CSS Grid, CSS Property, Reference
		The grid-template-rows CSS property defines the line names and track sizing functions of the grid rows.
720	hanging-punctuation	CSS, CSS Property, CSS Text, Experimental, NeedsBrowserCompatibility, NeedsCompatTable, Reference
		The hanging-punctuation CSS property specifies whether a punctuation mark should hang at the start or end of a line of text.
721	height	CSS, CSS Property, Reference
		The height CSS property specifies the height of an element. By default, the property defines the height of the content area. If box-sizing is set to border-box, however, it instead determines the height of the border area.
722	hyphens	CSS, CSS Property, CSS Text, Reference
		The hyphens CSS property specifies how words should be hyphenated when text wraps across multiple lines. You can prevent hyphenation entirely, use hyphenation in manually-specified points within the text, or let the browser automatically insert hyphens where appropriate.
723	image-orientation	CSS, CSS Images, CSS Property, EXIF, Experimental, Image Correction, Image Orientation, Orientation, Reference, image-orientation
		The image-orientation CSS property specifies a layout-independent correction to the orientation of an image.
724	image-rendering	CSS, CSS Images, CSS Property, Experimental, Reference, SVG
		The image-rendering CSS property indicates the algorithm to use when scaling images. When applied to an element, the property applies to the element itself, to any images supplied in its other properties, and to its descendant elements.
725	ime-mode	CSS, CSS Property, Deprecated
		The ime-mode CSS property controls the state of the input method editor (IME) for text fields. This property is obsolete.
726	inherit	CSS, CSS Cascade, CSS Value, Cascade, Inheritance, Layout, Reference, Style, inherit
		The inherit CSS keyword causes the element for which it is specified to take the computed value of the property from its parent element.
727	initial	CSS, CSS Cascade, CSS Value, Default state, Initial state, Layout, Reference, initial
		The initial CSS keyword applies the initial (or default) value of a property to an element. It can be applied to any CSS property.
728	initial-letter	CSS, CSS Inline, CSS Property, Experimental, Graphics, Layout, Reference, Web
		The initial-letter CSS property specifies styling for dropped, raised, and sunken initial letters.
729	initial-letter-align	CSS, CSS Inline, CSS Property, Experimental, Graphics, Layout, NeedsLiveSample, Reference, Web
		The initial-letter-align CSS property specifies the alignment of initial letters within a paragraph.
730	inline-size	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The inline-size CSS property defines the horizontal or vertical size of an element's block, depending on its writing mode. It corresponds to either the width or the height property, depending on the value of writing-mode.
731	inset-block-end	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The inset-block-end CSS property defines the logical block end offset of an element, which maps to a physical offset depending on the element's writing mode, directionality, and text orientation. It corresponds to the top, right, bottom, or left property depending on the values defined for writing-mode, direction, and text-orientation.
732	inset-block-start	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The inset-block-start CSS property defines the logical block start offset of an element, which maps to a physical offset depending on the element's writing mode, directionality, and text orientation. It corresponds to the top, right, bottom, or left property depending on the values defined for writing-mode, direction, and text-orientation.
733	inset-inline-end	CSS, CSS Logical Property, CSS Property, Experimental, NeedsContent, Reference
		The inset-inline-end CSS property defines the logical inline end inset of an element, which maps to a physical inset depending on the element's writing mode, directionality, and text orientation. It corresponds to the top, right, bottom, or left property depending on the values defined for writing-mode, direction, and text-orientation.
734	inset-inline-start	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The inset-inline-start CSS property defines the logical inline start inset of an element, which maps to a physical offset depending on the element's writing mode, directionality, and text orientation. It corresponds to the top, right, bottom, or left property depending on the values defined for writing-mode, direction, and text-orientation.
735	isolation	CSS, CSS Property, Compositing and Blending
		The isolation CSS property determines whether an element must create a new stacking context.
736	justify-content	CSS, CSS Box Alignment, CSS Property, Reference
		The CSS justify-content property defines how the browser distributes space between and around content items along the main-axis of their container.
737	justify-items	CSS, CSS Box Alignment, CSS Property, Reference
		The CSS justify-items property defines the default justify-self for all items of the box, giving them all a default way of justifying each box along the appropriate axis.
738	justify-self	CSS, CSS Box Alignment, CSS Property, Reference
		The CSS justify-self property defines the way of justifying a box inside its alignment container along the appropriate axis.
739	left	CSS, CSS Positioning, CSS Property, Reference
		The left CSS property participates in specifying the horizontal position of a positioned element. It has no effect on non-positioned elements.
740	letter-spacing	CSS, CSS Property, CSS Text, Reference, SVG
		The letter-spacing CSS property specifies the spacing behavior between text characters.
741	line-break	CSS, CSS Property, CSS Text, NeedsExample, Reference
		The line-break CSS property is used to specify how (or if) to break lines when working with punctuation and symbols. This only affects text in Chinese, Japanese, or Korean (CJK).
742	line-height	CSS, CSS Fonts, CSS Property, Reference
		The line-height CSS property sets the amount of space used for lines, such as in text. On block-level elements, it specifies the minimum height of line boxes within the element. On non-replaced inline elements, it specifies the height that is used to calculate line box height.
743	line-height-step	CSS, CSS Fonts, CSS Property, Reference
		The line-height-step CSS property defines the step units for line box heights. When the step unit is positive, line box heights are rounded up to the closest multiple of the unit. Negative values are invalid.
744	linear-gradient()	CSS, CSS Function, CSS Images, Graphics, Layout, NeedsNewCompatTable, Reference, Web
		The linear-gradient() CSS function creates an image consisting of a progressive transition between two or more colors along a straight line. Its result is an object of the <gradient> data type, which is a special kind of <image>.
745	list-style	CSS, CSS Lists, CSS Property, Reference
		The list-style CSS property is a shorthand for setting the individual values that define how a list is displayed: list-style-type, list-style-image, and list-style-position.
746	list-style-image	CSS, CSS Lists, CSS Property, Reference
		The list-style-image CSS property specifies an image to be used as the list item marker. It is often more convenient to use the shorthand list-style.
747	list-style-position	CSS, CSS Lists, CSS Property, Reference
		The list-style-position CSS property specifies the position of the ::marker relative to a list item.
748	list-style-type	CSS, CSS Lists, CSS Property, Reference
		The list-style-type CSS property specifies the appearance of a list item element.
749	margin	CSS, CSS Property, Reference
		The margin CSS property sets the margin area on all four sides of an element. It is a shorthand for setting all individual margins at once: margin-top, margin-right, margin-bottom, and margin-left.
750	margin-block-end	CSS, CSS Logical Property, CSS Property, Experimental, NeedsContent, Reference
		The margin-block-end CSS property defines the logical block end margin of an element, which maps to a physical margin depending on the element's writing mode, directionality, and text orientation.
751	margin-block-start	CSS, CSS Logical Property, CSS Property, Experimental, NeedsContent, Reference
		The margin-block-start CSS property defines the logical block start margin of an element, which maps to a physical margin depending on the element's writing mode, directionality, and text orientation.
752	margin-bottom	CSS, CSS Property, Reference
		The margin-bottom CSS property sets the margin area on the bottom of an element. A positive value will place it farther than normal from its neighbors, while a negative value will place it closer.
753	margin-inline-end	CSS, CSS Logical Property, CSS Property, Experimental, NeedsContent, Reference
		The margin-inline-end CSS property defines the logical inline end margin of an element, which maps to a physical margin depending on the element's writing mode, directionality, and text orientation. In other words, it corresponds to the margin-top, margin-right, margin-bottom or margin-left property depending on the values defined for writing-mode, direction, and text-orientation.
754	margin-inline-start	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The margin-inline-start CSS property defines the logical inline start margin of an element, which maps to a physical margin depending on the element's writing mode, directionality, and text orientation. It corresponds to the margin-top, margin-right, margin-bottom, or margin-left property depending on the values defined for writing-mode, direction, and text-orientation.
755	margin-left	CSS, CSS Property, Layout, Reference
		The margin-left CSS property sets the margin area on the left side of an element. A positive value will place it farther than normal from its neighbors, while a negative value will place it closer.
756	margin-right	CSS, CSS Property, Reference
		The margin-right CSS property sets the margin area on the right side of an element. A positive value will place it farther than normal from its neighbors, while a negative value will place it closer.
757	margin-top	CSS, CSS Property, Reference
		The margin-top CSS property sets the margin area on the top of an element. A positive value will place it farther than normal from its neighbors, while a negative value will place it closer.
758	mask	CSS, CSS Masking, CSS Property, Layout, Reference, SVG, Web
		The mask CSS property alters the visibility of an element by either partially or fully hiding it. This is accomplished by either masking or clipping the image at specific points.
759	mask-border	CSS, CSS Masking, CSS Property, Experimental, NeedsCompatTable, Reference
		The mask-border CSS property lets you create a mask along the edge of an element's border.
760	mask-border-mode	CSS, CSS Masking, CSS Property, Experimental, NeedsCompatTable, NeedsContent, NeedsExample, Reference
		The mask-border-mode CSS property specifies the blending mode used in a mask border.
761	mask-border-outset	CSS, CSS Masking, CSS Property, Experimental, NeedsCompatTable, NeedsExample, Reference
		The mask-border-outset CSS property specifies the distance by which an element's mask border is set out from its border box.
762	mask-border-repeat	CSS, CSS Masking, CSS Property, Experimental, NeedsCompatTable, NeedsExample, Reference
		The mask-border-repeat CSS property defines how the edge regions of a source image are adjusted to fit the dimensions of an element's mask border.
763	mask-border-slice	CSS, CSS Masking, CSS Property, Experimental, NeedsCompatTable, NeedsExample, Reference
		The mask-border-slice CSS property divides the image specified by mask-border-source into regions. These regions are used to form the components of an element's mask border.
764	mask-border-source	CSS, CSS Masking, CSS Property, Experimental, NeedsCompatTable, NeedsExample, Reference
		The mask-border-source CSS property specifies the source image used to create an element's mask border.
765	mask-border-width	CSS, CSS Masking, CSS Property, Experimental, NeedsCompatTable, NeedsExample, Reference
		The mask-border-width CSS property specifies the width of an element's mask border.
766	mask-clip	CSS, CSS Masking, CSS Property, Experimental, Reference
		The mask-clip CSS property determines the area, which is affected by a mask. The painted content of an element must be restricted to this area.
767	mask-composite	CSS, CSS Masking, CSS Property, Experimental, Reference
		The mask-composite CSS property represents a compositing operation used on the current mask layer with the mask layers below it.
768	mask-image	CSS, CSS Masking, CSS Property, Experimental, Reference
		The mask-image CSS property sets the image that is used as mask layer for an element.
769	mask-mode	CSS, CSS Masking, CSS Property, Experimental, Reference
		The mask-mode CSS property determines whether the mask reference defined by mask-image is treated as a luminance or alpha mask.
770	mask-origin	CSS, CSS Masking, CSS Property, Experimental, Reference
		The mask-origin CSS property determines the origin of a mask.
771	mask-position	CSS, CSS Masking, CSS Property, Experimental, Reference
		The mask-position CSS property sets the initial position, relative to the mask position layer defined by mask-origin, for each defined mask image.
772	mask-repeat	CSS, CSS Masking, CSS Property, Experimental, Reference
		The mask-repeat CSS property defines how mask images are repeated. A mask image can be repeated along the horizontal axis, the vertical axis, both axes, or not repeated at all.
773	mask-size	CSS, CSS Masking, CSS Property, Experimental, Reference
		The mask-size CSS property specifies the sizes of the mask images. The size of the image can be fully or partially constrained in order to preserve its intrinsic ratio.
774	mask-type	CSS, CSS Masking, CSS Property, Reference, SVG
		The mask-type CSS property determines whether the mask defined by an SVG <mask> element is used as a luminance or an alpha mask. It applies to the <mask> element itself.
775	max-block-size	CSS, CSS Logical Property, CSS Property, Experimental, Layout, Maximum Height, Maximum Width, Reference, height, max-block-size, size, width
		The max-block-size CSS property specifies the maximum size of an element in the direction opposite that of the writing direction as specified by writing-mode.
776	max-height	CSS, CSS Property, Reference
		The max-height CSS property sets the maximum height of an element. It prevents the used value of the height property from becoming larger than the value specified for max-height.
777	max-inline-size	CSS, CSS Logical Properties, CSS Logical Property, CSS Property, Element size, Experimental, Reference, Text Direction, Writing Mode, max-inline-size
		The max-inline-size CSS property defines the horizontal or vertical maximum size of an element's block depending on its writing mode. It corresponds to the max-width or the max-height property depending on the value defined for writing-mode. If the writing mode is vertically oriented, the value of max-inline-size relates to the maximal height of the element, otherwise it relates to the maximal width of the element. It relates to max-block-size, which defines the other dimension of the element.
778	max-width	CSS, CSS Property, Reference
		The max-width CSS property sets the maximum width of an element. It prevents the used value of the width property from becoming larger than the value specified by max-width.
779	min-block-size	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The min-block-size CSS property defines the minimum horizontal or vertical size of an element's block, depending on its writing mode. It corresponds to either the min-width or the min-height property, depending on the value of writing-mode.
780	min-height	CSS, CSS Property, Reference
		The min-height CSS property sets the minimum height of an element. It prevents the used value of the height property from becoming smaller than the value specified for min-height.
781	min-inline-size	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The min-inline-size CSS property defines the horizontal or vertical minimal size of an element's block, depending on its writing mode. It corresponds to either the min-width or the min-height property, depending on the value of writing-mode.
782	min-width	CSS, CSS Property, Reference
		The min-width CSS property sets the minimum width of an element. It prevents the used value of the width property from becoming smaller than the value specified for min-width.
783	minmax()	CSS, CSS Function, CSS Grid, Experimental, Layout, Reference, Web
		The minmax() CSS function defines a size range greater than or equal to min and less than or equal to max. It is used with CSS Grids.
784	mix-blend-mode	CSS, CSS Property, Compositing and Blending
		The mix-blend-mode CSS property describes how an element's content should blend with the content of the element's direct parent and the element's background.
785	object-fit	CSS, CSS Images, CSS Property, Layout, Reference, css layout, object-fit, size
		The object-fit CSS property specifies how the contents of a replaced element, such as an <img> or <video>, should be resized to fit its container.
786	object-position	CSS, CSS Images, CSS Property, Layout, Position, Reference, Replaced Elements, css layout, object-position
		The object-position CSS property specifies the alignment of the selected replaced element's contents within the element's box.
787	offset	CSS, CSS Motion, CSS Property, Draft, Experimental, NeedsContent, Non-standard, Reference
		The offset CSS property is a shorthand property for animating an element along a defined path.
788	offset-distance	CSS, Draft, NeedsContent, NeedsLiveSample, Reference, motion-offset, offset-distance
		The offset-distance CSS property specifies a position along an offset-path.
789	offset-path	CSS, Reference, motion-path, offset-path
		The offset-path CSS property specifies a motion path for an element to follow and defines the element's positioning within the parent container or SVG coordinate system.
790	offset-rotate	CSS, CSS Property, Draft, NeedsContent, NeedsLiveSample, Reference, offset-rotate
		The offset-rotate CSS property defines the direction of the element while positioning along the offset path.
791	opacity	CSS, CSS Property, Reference
		The opacity CSS property specifies the level of transparency of an element, that is, the degree to which the content behind the element is visible.
792	order	CSS, CSS Flexible Boxes, CSS Property, Reference
		The order CSS property specifies the order used to lay out a flex or grid item in its flex or grid container. Items within the same container are laid out in ascending order according to their order values. Elements with the same order value are laid out in the order in which they appear in the source code.
793	orphans	CSS, CSS Fragmentation, CSS Multi-column Layout, CSS Property, Reference
		The orphans CSS property specifies the minimum number of lines in a block container that must be shown at the bottom of a page, region, or column. This property is normally used to control how breaks occur.
794	outline	CSS, CSS Outline, CSS Property, Layout, Reference
		The outline CSS property is a shorthand for setting various outline properties in a single declaration: outline-style, outline-width, and outline-color.
795	outline-color	CSS, CSS Outline, CSS Property, CSS User Interace, HTML Colors, HTML Styles, Outline, Reference, Styles, Styling HTML, outline-color
		The outline-color CSS property sets the color of an element's outline.
796	outline-offset	CSS, CSS Outline, CSS Property, Reference
		The outline-offset CSS property sets the amount of space between an outline and the edge or border of an element.
797	outline-style	CSS, CSS Outline, CSS Property, Reference
		The outline-style CSS property sets the style of an element's outline. An outline is a line that is drawn around an element, outside the border.
798	outline-width	CSS, CSS Outline, CSS Property, Layout, Reference
		The outline-width CSS property sets the width (thickness) of an element's outline. An outline is a line that is drawn around an element, outside the border.
799	overflow	CSS, CSS Box Model, CSS Property, Layout, Reference, overflow
		The overflow CSS property specifies what to do when an element's content is too large to fit in its block formatting context. It is a shorthand for the overflow-x and overflow-y properties.
800	overflow-wrap	CSS, CSS Property, CSS Text, Reference
		The overflow-wrap CSS property specifies whether or not the browser should insert line breaks within words to prevent text from overflowing its content box.
801	overflow-x	CSS, CSS Box Model, CSS Property, Reference
		The overflow-x CSS property specifies whether to clip content, render a scroll bar, or display overflow content of a block-level element, when it overflows at the left and right edges.
802	overflow-y	CSS, CSS Box Model, CSS Property, Reference
		The overflow-y CSS property specifies whether to clip content, render a scroll bar, or display overflow content of a block-level element, when it overflows at the top and bottom edges.
803	overscroll-behavior	CSS, CSS Box Model, CSS Property, Non-standard, Reference, overscroll-behavior
		The overscroll-behavior CSS property is shorthand for the overscroll-behavior-x and overscroll-behavior-y properties, which allow you to control the browser's scroll overflow behavior — what happens when the boundary of a scrolling area is reached.
804	overscroll-behavior-x	CSS, CSS Box Model, CSS Property, Non-standard, Reference, overscroll-behavior-x
		The overscroll-behavior-x CSS property is allows you to control the browser's scroll overflow behavior — what happens when the boundary of a scrolling area is reached — in the x axis direction.
805	overscroll-behavior-y	CSS, CSS Box Model, CSS Property, Non-standard, Reference, overscroll-behavior-y
		The overscroll-behavior-y CSS property is allows you to control the browser's scroll overflow behavior — what happens when the boundary of a scrolling area is reached — in the y axis direction.
806	padding	CSS, CSS Padding, CSS Property, Reference
		The padding CSS property sets the padding area on all four sides of an element. It is a shorthand for setting all individual paddings at once: padding-top, padding-right, padding-bottom, and padding-left.
807	padding-block-end	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The padding-block-end CSS property defines the logical block end padding of an element, which maps to a physical padding depending on the element's writing mode, directionality, and text orientation. It corresponds to the padding-top, padding-right, padding-bottom, or padding-left property depending on the values defined for writing-mode, direction, and text-orientation.
808	padding-block-start	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The padding-block-start CSS property defines the logical block start padding of an element, which maps to a physical padding depending on the element's writing mode, directionality, and text orientation. It corresponds to the padding-top, padding-right, padding-bottom, or padding-left property depending on the values defined for writing-mode, direction, and text-orientation.
809	padding-bottom	CSS, CSS Padding, CSS Property, Reference
		The padding-bottom CSS property sets the height of the padding area on the bottom of an element.
810	padding-inline-end	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The padding-inline-end CSS property defines the logical inline end padding of an element, which maps to a physical padding depending on the element's writing mode, directionality, and text orientation. It corresponds to the padding-top, padding-right, padding-bottom, or padding-left property depending on the values defined for writing-mode, direction, and text-orientation.
811	padding-inline-start	CSS, CSS Logical Property, CSS Property, Experimental, Reference
		The padding-inline-start CSS property defines the logical inline start padding of an element, which maps to a physical padding depending on the element's writing mode, directionality, and text orientation. It corresponds to the padding-top, padding-right, padding-bottom, or padding-left property depending on the values defined for writing-mode, direction, and text-orientation.
812	padding-left	CSS, CSS Padding, CSS Property, Reference
		The padding-left CSS property sets the width of the padding area on the left side of an element.
813	padding-right	CSS, CSS Padding, CSS Property, Reference
		The padding-right CSS property sets the width of the padding area on the right side of an element.
814	padding-top	CSS, CSS Padding, CSS Property, Reference
		The padding-top CSS property sets the height of the padding area on the top of an element.
815	page-break-after	CSS, CSS Property, Page Breaks, Reference
		The page-break-after CSS property adjusts page breaks after the current element.
816	page-break-before	CSS, CSS Property, Page Breaks, Reference
		The page-break-before CSS property adjusts page breaks before the current element.
817	page-break-inside	CSS, CSS Property, Page Breaks, Reference
		The page-break-inside CSS property adjusts page breaks inside the current element.
818	paint-order	CSS, Reference, SVG, Web, paint-order
		The paint-order CSS property lets you control the order in which the fill and stroke (and painting markers) of text content and shapes are drawn.
819	perspective	3D, CSS, CSS Property, CSS Transforms, Distance, Graphics, Property, Reference, perspective
		The perspective CSS property determines the distance between the z=0 plane and the user in order to give a 3D-positioned element some perspective. Each 3D element with z>0 becomes larger; each 3D-element with z<0 becomes smaller. The strength of the effect is determined by the value of this property.
820	perspective-origin	3D, CSS, CSS Property, CSS Transforms, Graphics, Property, Reference, Transforms, perspective, perspective-origin
		The perspective-origin CSS property determines the position at which the viewer is looking. It is used as the vanishing point by the perspective property.
821	place-content	CSS, CSS Box Alignment, CSS Property, Reference
		The place-content CSS shorthand property sets both the align-content and justify-content properties.
822	place-items	CSS, CSS Flexible Boxes, CSS Grid, CSS Property, Reference
		The CSS place-items shorthand property sets both the align-items and justify-items properties. The first value is the align-items property value, the second the justify-items one. If the second value is not present, the first value is also used for it.
823	place-self	CSS, CSS Box Alignment, CSS Property, Reference
		The place-self CSS property is a shorthand property sets both the align-self and justify-self properties. The first value is the align-self property value, the second the justify-self one. If the second value is not present, the first value is also used for it.
824	pointer-events	CSS, CSS Property, Reference, SVG
		The pointer-events CSS property specifies under what circumstances (if any) a particular graphic element can become the target of mouse events.
825	position	CSS, CSS Positioning, CSS Property, Reference
		The position CSS property specifies how an element is positioned in a document. The top, right, bottom, and left properties determine the final location of positioned elements.
826	quotes	CSS, CSS Property, Generated Content, Layout, Reference, Web
		The quotes CSS property indicates how user agents should render quotation marks.
827	radial-gradient()	CSS, CSS Function, CSS Images, Graphics, Layout, Reference, Web
		The radial-gradient() CSS function creates an image consisting of a progressive transition between two or more colors that radiate from an origin. Its shape may be a circle or an ellipse. The function's result is an object of the <gradient> data type, which is a special kind of <image>.
828	repeat()	CSS, CSS Function, CSS Grid, Layout, Reference, Web
		The repeat() CSS function represents a repeated fragment of the track list, allowing a large number of columns or rows that exhibit a recurring pattern to be written in a more compact form.
829	repeating-linear-gradient()	CSS, CSS Function, CSS Images, Graphics, Layout, Reference, Web
		The repeating-linear-gradient() CSS function creates an image consisting of repeating linear gradients. It is similar to linear-gradient() and takes the same arguments, but it repeats the color stops infinitely in all directions so as to cover its entire container. The function's result is an object of the <gradient> data type, which is a special kind of <image>.
830	repeating-radial-gradient()	CSS, CSS Function, CSS Images, Graphics, Layout, NeedsBrowserCompatibility, Reference, Web
		The repeating-radial-gradient() CSS function creates an image consisting of repeating gradients that radiate from an origin. It is similar to radial-gradient() and takes the same arguments, but it repeats the color stops infinitely in all directions so as to cover its entire container. The function's result is an object of the <gradient> data type, which is a special kind of <image>.
831	resize	Basic User Interface, CSS, CSS Property, Reference
		The resize CSS property sets whether an element is resizable, and if so, in which direction(s).
832	revert	CSS, CSS Cascade, CSS Value, Layout, Reference
		The revert CSS keyword rolls back the cascade so that a property takes on the value it would have had if there were no styles in the current style origin (author, user, or user-agent).
833	right	CSS, CSS Positioning, CSS Property, Layout, Reference, Web
		The right CSS property participates in specifying the horizontal position of a positioned element. It has no effect on non-positioned elements.
834	rotate	CSS, CSS Property, Reference, Transforms
		The rotate CSS property allows you to specify rotation transforms individually and independantly of the transform property. This maps better to typical user interface usage, and saves having to remember the exact order of transform functions to specify in the transform value.
835	row-gap (grid-row-gap)	CSS, CSS Flexible Boxes, CSS Grid, CSS Property, Reference, row-gap
		The row-gap CSS property sets the size of the gap (gutter) between an element's rows.
836	ruby-align	CSS, CSS Property, CSS Ruby, Reference
		The ruby-align CSS property defines the distribution of the different ruby elements over the base.
837	ruby-position	CSS, CSS Property, CSS Ruby, Reference
		The ruby-position CSS property defines the position of a ruby element relatives to its base element. It can be position over the element (over), under it (under), or between the characters, on their right side (inter-character).
838	scale	CSS, CSS Property, Reference, Transforms
		The scale CSS property allows you to specify scale transforms individually and independantly of the transform property. This maps better to typical user interface usage, and saves having to remember the exact order of transform functions to specify in the transform value.
839	scroll-behavior	CSS, CSS Property, CSSOM View, Reference
		The scroll-behavior CSS property specifies the scrolling behavior for a scrolling box when scrolling is triggered by one of the navigation or CSSOM scrolling APIs.
840	scroll-snap-coordinate	CSS, CSS Property, CSS Scroll Snap, Deprecated, Reference
		The scroll-snap-coordinate CSS property defines the x and y coordinate positions within an element that will align with its nearest ancestor scroll container's scroll-snap-destination for each respective axis.
841	scroll-snap-destination	CSS, CSS Property, CSS Scroll Snap, Deprecated, Reference
		The scroll-snap-destination CSS property defines the position in x and y coordinates within the scroll container's visual viewport which element snap points align with.
842	scroll-snap-points-x	CSS, CSS Property, CSS Scroll Snap, Deprecated, Reference
		The scroll-snap-points-x CSS property defines the horizontal positioning of snap points within the content of the scroll container they are applied to.
843	scroll-snap-points-y	CSS, CSS Property, CSS Scroll Snap, Deprecated, Reference
		The scroll-snap-points-y CSS property defines the vertical positioning of snap points within the content of the scroll container they are applied to.
844	scroll-snap-type	CSS, CSS Property, CSS Scroll Snap, Experimental, Reference
		The scroll-snap-type CSS property defines how strictly snap points are enforced on the scroll container in case there is one.
845	scroll-snap-type-x	CSS, CSS Property, CSS Scroll Snap, NeedsExample, Non-standard, Reference
		The scroll-snap-type-x CSS property defines how strictly snap points are enforced on the horizontal axis of the scroll container in case there is one.
846	scroll-snap-type-y	CSS, CSS Property, CSS Scroll Snap, NeedsExample, Non-standard, Reference
		The scroll-snap-type-y CSS property defines how strictly snap points are enforced on the vertical axis of the scroll container in case there is one.
847	scrollbar-face-color	CSS, CSS Property, Reference, scrollbar-face-color
		The scrollbar-face-color property allows the author to set the color of the scrollbar face.
848	scrollbar-track-color	CSS, CSS Property, Reference, scrollbar-track-color
		The scrollbar-track-color property allows the author to set the color of the scrollbar track.
849	scrollbar-width	CSS, CSS Property, Reference, scrollbar-width
		The scrollbar-width property allows the author to set the maximum thickness of an element’s scrollbars when they are shown.
850	shape-image-threshold	Boundaries, CSS, CSS Property, CSS Shapes, Float Area, Opacity, Property, Reference, Shape, shape-image-threshold
		The shape-image-threshold CSS property defines the alpha channel threshold used to extract the shape using an image as the value for shape-outside.
851	shape-margin	Boundaries, CSS, CSS Property, CSS Shapes, Float Area, Property, Reference, Shape, float, margin, shape-margin
		The shape-margin CSS property specifies a margin for a CSS shape created using shape-outside.
852	shape-outside	Boundaries, CSS, CSS Property, CSS Shapes, Float Area, Property, Reference, Shape, margin, shape-outside, wrapping
		The shape-outside CSS property defines a shape—which may be non-rectangular—around which adjacent inline content should wrap
853	symbols()	CSS, CSS Counter Styles, Reference
		The symbols() CSS function lets you define counter styles inline, directly as the value of a property such as list-style. Unlike @counter-style, symbols() is anonymous (i.e., it can only be used once). Although less powerful, it is shorter and easier to write than @counter-style.
854	tab-size	CSS, CSS Property, CSS Text, Experimental, Reference
		The tab-size CSS property is used to customize the width of a tab (U+0009) character.
855	table-layout	CSS, CSS Property, CSS Tables, Reference
		The table-layout CSS property specifies the algorithm used to lay out <table> cells, rows, and columns.
856	text-align	CSS, CSS Property, CSS Text, Reference
		The text-align CSS property specifies the horizontal alignment of an inline or table-cell box.This means it works like vertical-align but in the horizontal direction.
857	text-align-last	CSS, CSS Property, CSS Text, Experimental, Reference
		The text-align-last CSS property describes how the last line of a block or a line, right before a forced line break, is aligned.
858	text-combine-upright	CSS, CSS Property, CSS Writing Modes, Experimental, Reference
		The text-combine-upright CSS property specifies the combination of multiple characters into the space of a single character. If the combined text is wider than 1em, the user agent must fit the contents within 1em. The resulting composition is treated as a single upright glyph for layout and decoration. This property only has an effect in vertical writing modes.
859	text-decoration	CSS, CSS Property, CSS Text Decoration, Reference
		The text-decoration CSS property specifies the appearance of decorative lines used on text. It is a shorthand for setting one or more individual text-decoration values in a single declaration, which include text-decoration-line, text-decoration-color, and text-decoration-style.
860	text-decoration-color	CSS, CSS Property, CSS Text, CSS Text Decoration, HTML Colors, HTML Styles, Reference, Styling HTML, Styling text, colors, text-decoration-color
		The text-decoration-color CSS property sets the color of the decorative additions to text that are specified by text-decoration-line; these include underlines and overlines, strikethroughs, and wavy lines like those typically used to indicate content is misspelled (for example). The specified color applies to all such decorative lines in the scope of the property's value.
861	text-decoration-line	CSS, CSS Property, CSS Text Decoration, Reference
		The text-decoration-line CSS property sets the kind of decoration that is used on text in an element.
862	text-decoration-skip	CSS, CSS Property, CSS Text Decoration, Experimental, Layout, Reference, Web
		The text-decoration-skip CSS property specifies what parts of an element’s content any text decoration affecting the element must skip over.
863	text-decoration-skip-ink	CSS, CSS Property, CSS Text Decoration, Experimental, Layout, Reference, Web
		The text-decoration-skip-ink CSS property specifies how overlines and underlines are drawn when they pass over glyph ascenders and descenders.
864	text-decoration-style	CSS, CSS Property, CSS Text Decoration, Layout, Reference
		The text-decoration-style CSS property sets the style of the lines specified by text-decoration-line. The style applies to all lines that are specified; there is no way to define different styles for each of the lines defined by text-decoration-line.
865	text-emphasis	CSS, CSS Property, CSS Text Decoration, Reference
		The text-emphasis CSS property is a shorthand property for setting text-emphasis-style and text-emphasis-color in one declaration. This property will apply the specified emphasis mark to each character of the element's text, except separator characters, like spaces,  and control characters.
866	text-emphasis-color	CSS, CSS Property, CSS Styles, CSS Text Decoration, HTML Colors, Reference, Styling HTML, Text Emphasis, text-decoration-color
		The text-emphasis-color CSS property defines the color used to draw emphasis marks on text being rendered in the HTML document. This value can also be set and reset using the text-emphasis shorthand.
867	text-emphasis-position	CSS, CSS Property, CSS Text Decoration, Reference
		The text-emphasis-position CSS property describes where emphasis marks are drawn at. The effect of emphasis marks on the line height is the same as for ruby text: if there isn't enough place, the line height is increased.
868	text-emphasis-style	CSS, CSS Property, CSS Text Decoration, Reference
		The text-emphasis-style CSS property defines the type of emphasis used. It can also be set, and reset, using the text-emphasis shorthand.
869	text-indent	CSS, CSS Property, CSS Text, Layout, Reference
		The text-indent CSS property specifies the amount of indentation (empty space) that is put before lines of text in a block. By default, this controls the indentation of only the first formatted line of the block, but the hanging and each-line keywords can be used to change this behavior.
870	text-justify	CSS, CSS Property, CSS Text, Reference, text-justify
		The text-justify CSS property defines what type of justification should be applied to text when it is justified (i.e., when text-align: justify; is set on it).
871	text-orientation	CSS, CSS Property, CSS Writing Modes, Experimental, Reference
		The text-orientation CSS property defines the orientation of the text characters in a line. This property only has an effect in vertical mode, that is, when writing-mode is not horizontal-tb. It is useful for controlling the display of languages that use vertical script, and also for making vertical table headers.
872	text-overflow	CSS, CSS Property, Reference
		The text-overflow CSS property determines how overflowed content that is not displayed is signaled to users. It can be clipped, display an ellipsis ('…', U+2026 Horizontal Ellipsis), or display a custom string.
873	text-rendering	CSS, CSS Property, Legibility, Ligatures, Precision, Reference, SVG, Text, Text Features, Text Rendering
		The text-rendering CSS property provides information to the rendering engine about what to optimize for when rendering text.
874	text-shadow	CSS, CSS Property, CSS Styles, CSS Text Decoration, HTML Colors, HTML Styles, Reference, Styles, Styling HTML, color
		The text-shadow CSS property adds shadows to text. It accepts a comma-separated list of shadows to be applied to the text and any of its decorations.
875	text-size-adjust	CSS, CSS Mobile Text Size Adjustment, CSS Property, Experimental, NeedsExample, Reference
		The text-size-adjust CSS property controls the text inflation algorithm used on some smartphones and tablets. Other browsers will ignore this property.
876	text-transform	CSS, CSS Property, Layout, Reference, Text
		The text-transform CSS property specifies how to capitalize an element's text. It can be used to make text appear in all-uppercase or all-lowercase, or with each word capitalized.
877	text-underline-position	CSS, CSS Property, CSS Text Decoration, Reference
		The text-underline-position CSS property specifies the position of the underline which is set using the text-decoration property's underline value.
878	top	CSS, CSS Positioning, CSS Property, Reference
		The top CSS property participates in specifying the vertical position of a positioned element. It has no effect on non-positioned elements.
879	touch-action	CSS, CSS Property, NeedsLiveSample, Pointer Events, Reference
		The touch-action CSS property specifies whether, and in what ways, a given region can be manipulated by the user via a touchscreen (for instance, by panning or zooming features built into the browser).
880	transform	CSS, CSS Property, Reference, Transforms
		The transform CSS property lets you rotate, scale, skew, or translate a given element. This is achieved by modifying the coordinate space of the CSS visual formatting model.
881	transform-box	CSS, CSS Property, CSS Transforms, Experimental, NeedsExample, Reference
		The transform-box CSS property defines the layout box to which the transform and transform-origin properties relate.
882	transform-origin	CSS, CSS Property, CSS Transforms, Experimental, Reference
		The transform-origin CSS property sets the origin for an element's transformations.
883	transform-style	CSS, CSS Property, CSS Transforms, Experimental, Reference
		The transform-style CSS property determines if the children of an element are positioned in the 3D-space or are flattened in the plane of the element.
884	transition	CSS, CSS Property, CSS Transitions, Reference
		The transition CSS property is a shorthand property for transition-property, transition-duration, transition-timing-function, and transition-delay.
885	transition-delay	CSS, CSS Property, CSS Transitions, Reference
		The transition-delay CSS property specifies the amount of time to wait before starting a property's transition effect when its value changes.
886	transition-duration	CSS, CSS Property, CSS Transitions, Reference
		The transition-duration CSS property specifies the number of seconds or milliseconds a transition animation should take to complete. By default, the value is 0s, meaning that no animation will occur.
887	transition-property	CSS, CSS Property, CSS Transitions, Reference
		The transition-property CSS property specifies the CSS properties to which a transition effect should be applied.
888	transition-timing-function	CSS, CSS Property, CSS Transitions, Reference
		The transition-timing-function CSS property is used to describe how the intermediate values of the CSS properties being affected by a transition effect are calculated.
889	translate	CSS, CSS Property, Non-standard, Reference, Transforms
		The translate CSS property allows you to specify translation transforms individually and independantly of the transform property. This maps better to typical user interface usage, and saves having to remember the exact order of transform functions to specify in the transform value.
890	unicode-bidi	BiDi, CSS, CSS Property, Reference
		The unicode-bidi CSS property, together with the direction property, determines how bidirectional text in a document is handled. For example, if a block of content contains both left-to-right and right-to-left text, the user-agent uses a complex Unicode algorithm to decide how to display the text. The unicode-bidi property overrides this algorithm and allows the developer to control the text embedding.
891	unset	CSS, CSS Cascade, CSS Value, Layout, Reference, Style, unset
		The unset CSS keyword resets a property to its inherited value if it inherits from its parent, and to its initial value if not.
892	user-select	CSS, CSS Property, Experimental, Reference
		The user-select CSS property controls whether the user can select text. This doesn't have any effect on content loaded as chrome, except in textboxes.
893	var()	CSS, CSS Custom Properties, CSS Function, CSS Variables, Experimental, Reference, Variables, var, var()
		The var() CSS function can be used to insert the value of a custom property (sometimes called a "CSS variable") instead of any part of a value of another property.
894	vertical-align	CSS, CSS Property, Reference
		The vertical-align CSS property specifies the vertical alignment of an inline or table-cell box.
895	visibility	CSS, CSS Box Model, CSS Property, Layout, Reference, Web
		The visibility CSS property can show or hide an element without affecting the layout of a document (i.e., space is created for elements regardless of whether they are visible or not). The property can also hide rows or columns in a <table>.
896	white-space	CSS, CSS Property, CSS Text, Reference
		The white-space CSS property determines how white space inside an element is handled.
897	widows	CSS, CSS Fragmentation, CSS Multi-column Layout, CSS Property, Reference
		The widows CSS property specifies the minimum number of lines in a block container that must be shown at the top of a page, region, or column. This property is normally used to control how breaks occur.
898	width	CSS, CSS Property, Reference, dimensions, size, width
		The width CSS property specifies the width of an element. By default, the property defines the width of the content area. If box-sizing is set to border-box, however, it instead determines the width of the border area.
899	will-change	CSS, CSS Property, CSS Will-change, Performance, Reference, Transitions
		The will-change CSS property provides a way for authors to hint browsers about the kind of changes to be expected on an element, so that the browser can set up appropriate optimizations ahead of time before the element is actually changed.
900	word-break	CSS, CSS Property, Reference
		The word-break CSS property specifies whether or not the browser should insert line breaks wherever the text would otherwise overflow its content box.
901	word-spacing	CSS, CSS Property, CSS Text, Reference
		The word-spacing CSS property specifies the spacing behavior between tags and words.
902	writing-mode	CSS, CSS Property, Layout, Reference
		The writing-mode CSS property defines whether lines of text are laid out horizontally or vertically, as well as the direction in which blocks progress.
903	z-index	CSS, CSS Property, Reference
		The z-index CSS property specifies the z-order of a positioned element and its descendants or flex items (children of an element with display: flex). When elements overlap, z-order determines which one covers the other. An element with a larger z-index generally covers an element with a lower one.
904	zoom	CSS, CSS Property, Non-standard, Reference
		The non-standard zoom CSS property can be used to control the magnification level of an element.