Element: id property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The id property of the Element interface represents the element's identifier, reflecting the id global attribute.

If the id value is not the empty string, it must be unique in a document.

The id is often used with getElementById() to retrieve a particular element. Another common case is to use an element's ID as a selector when styling the document with CSS.

Note: Identifiers are case-sensitive, but you should avoid creating IDs that differ only in the capitalization.

Value

A string.

Specifications

Specification
DOM
# ref-for-dom-element-id①

Browser compatibility

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desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
id

Legend

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Full support
Full support
Partial support
Partial support
Has more compatibility info.

See also

  • The DOM id global attribute.