-webkit-border-before

Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

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.

/* Border values */
-webkit-border-before: 1px;
-webkit-border-before: 2px dotted;
-webkit-border-before: medium dashed blue;

/* Global values */
-webkit-border-before: inherit;
-webkit-border-before: initial;
-webkit-border-before: unset;

-webkit-border-before can be used to set the values for one or more of: -webkit-border-before-width, -webkit-border-before-style, and -webkit-border-before-color. It maps to a physical border depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top, border-right, border-bottom, or border-left property depending on the values defined for writing-mode, direction, and text-orientation.

It relates to -webkit-border-after, -webkit-border-start, and -webkit-border-end, which define the other borders of the element.

This property is on the standard track as border-block-start.

Initial valueas each of the properties of the shorthand:
Applies toall elements
Inheritedyes
Percentagesas each of the properties of the shorthand:
Mediavisual
Computed valueas each of the properties of the shorthand:
Animation typediscrete
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Syntax

Values

One or more of the following, in any order:

<'border-width'>
See border-width
<'border-style'>
See border-style
<'color'>
See color

Formal syntax

<'border-width'> || <'border-style'> || <'color'>

where
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>

where
<rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]? ) | rgb( <number>{3} [ / <alpha-value> ]? ) | rgb( <percentage>#{3} , <alpha-value>? ) | rgb( <number>#{3} , <alpha-value>? )
<rgba()> = rgba( <percentage>{3} [ / <alpha-value> ]? ) | rgba( <number>{3} [ / <alpha-value> ]? ) | rgba( <percentage>#{3} , <alpha-value>? ) | rgba( <number>#{3} , <alpha-value>? )
<hsl()> = hsl( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsl( <hue>, <percentage>, <percentage>, <alpha-value>? )
<hsla()> = hsla( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsla( <hue>, <percentage>, <percentage>, <alpha-value>? )

where
<alpha-value> = <number> | <percentage>
<hue> = <number> | <angle>

Example

HTML Content

<div>
  <p class="exampleText">Example text</p>
</div>

CSS Content

div {
  background-color: yellow;
  width: 120px;
  height: 120px;
}

.exampleText {
  writing-mode: vertical-rl;
  -webkit-border-before: 5px dashed blue;
}

Specifications

Not part of any specification, though it relates to the border-block-start property.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
-webkit-border-before
Non-standard
Chrome Full support 8Edge No support NoFirefox No support NoIE No support NoOpera Full support 15Safari Full support 5.1WebView Android Full support 37Chrome Android Full support 18Firefox Android No support NoOpera Android Full support 15Safari iOS Full support 5.1Samsung Internet Android Full support Yes

Legend

Full support  
Full support
No support  
No support
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.

See also