HTMLElement

HTMLElement 介面表示了所有的 HTML 元素。部分元素直接實作了此介面，其它則是實作繼承自 HTMLElement 的子介面。

Inherits properties from its parent, Element, and implements those from GlobalEventHandlers and TouchEventHandlers.

HTMLElement.accessKey (en-US)

Is a DOMString representing the access key assigned to the element.

HTMLElement.accessKeyLabel (en-US) Read only

Returns a DOMString containing the element's assigned access key.

HTMLElement.contentEditable (en-US)

Is a DOMString, where a value of "true" means the element is editable and a value of "false" means it isn't.

HTMLElement.isContentEditable (en-US) Read only

Returns a Boolean (en-US) that indicates whether or not the content of the element can be edited.

HTMLElement.contextMenu (en-US)

Is a HTMLMenuElement (en-US) representing the contextual menu associated with the element. It may be null.

HTMLElement.dataset Read only

Returns a DOMStringMap (en-US) with which script can read and write the element's custom data attributes (data-*) .

HTMLElement.dir (en-US)

Is a DOMString, reflecting the dir global attribute, representing the directionality of the element. Possible values are "ltr", "rtl", and "auto".

HTMLElement.draggable

Is a Boolean indicating if the element can be dragged.

HTMLElement.dropzone Read only

Returns a DOMSettableTokenList reflecting the dropzone global attribute and describing the behavior of the element regarding a drop operation.

HTMLElement.hidden (en-US)

Is a Boolean indicating if the element is hidden or not.

HTMLElement.itemScope

Is a Boolean representing the item scope.

HTMLElement.itemType Read only

Returns a DOMSettableTokenList…

HTMLElement.itemId

Is a DOMString representing the item ID.

HTMLElement.itemRef Read only

Returns a DOMSettableTokenList…

HTMLElement.itemProp Read only

Returns a DOMSettableTokenList…

HTMLElement.itemValue

Returns a Object representing the item value.

HTMLElement.lang

Is a DOMString representing the language of an element's attributes, text, and element contents.

HTMLElement.offsetHeight (en-US) Read only

Returns a double containing the height of an element, relative to the layout.

HTMLElement.offsetLeft (en-US)Read only

Returns a double, the distance from this element's left border to its offsetParent's left border.

HTMLElement.offsetParent (en-US)Read only

Returns a Element that is the element from which all offset calculations are currently computed.

HTMLElement.offsetTop (en-US)Read only

Returns a double, the distance from this element's top border to its offsetParent's top border.

HTMLElement.offsetWidth (en-US)Read only

Returns a double containing the width of an element, relative to the layout.

HTMLElement.properties Read only

Returns a HTMLPropertiesCollection…

HTMLElement.spellcheck

Is a Boolean that controls spell-checking. It is present on all HTML elements, though it doesn't have an effect on all of them.

HTMLElement.style

Is a CSSStyleDeclaration, an object representing the declarations of an element's style attributes.

HTMLElement.tabIndex (en-US)

Is a long representing the position of the element in the tabbing order.

HTMLElement.title (en-US)

Is a DOMString containing the text that appears in a popup box when mouse is over the element.

HTMLElement.translate

Is a Boolean representing the translation.

Most events properties, of the form onXYZ, are defined on the GlobalEventHandlers or TouchEventHandlers, implemented by HTMLElement. A few more are specific to HTMLElement.

HTMLElement.oncopy (en-US) 

Returns the event handling code for the copy event (bug 280959).

HTMLElement.oncut (en-US) 

Returns the event handling code for the cut event (bug 280959).

HTMLElement.onpaste (en-US)

Returns the event handling code for the paste event (bug 280959).

TouchEventHandlers.ontouchstart

Returns the event handling code for the touchstart (en-US) event.

TouchEventHandlers.ontouchend

Returns the event handling code for the touchend (en-US) event.

TouchEventHandlers.ontouchmove

Returns the event handling code for the touchmove (en-US) event.

TouchEventHandlers.ontouchenter

Returns the event handling code for the touchenter event.

TouchEventHandlers.ontouchleave

Returns the event handling code for the touchleave event.

TouchEventHandlers.ontouchcancel

Returns the event handling code for the touchcancel event.

Inherits methods from its parent, Element.

HTMLElement.blur() (en-US)

Removes keyboard focus from the currently focused element.

HTMLElement.click()

Sends a mouse click event to the element.

HTMLElement.focus() (en-US)

Makes the element the current keyboard focus.

HTMLElement.forceSpellCheck() (en-US)

Runs the spell checker on the element's contents.

• Element