CSSKeywordValue: CSSKeywordValue() constructor

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

See full compatibility

The CSSKeywordValue() constructor creates a new CSSKeywordValue object which represents CSS keywords and other identifiers.

Syntax

new CSSKeywordValue(val)

Parameters

value: Sets or returns the value of the new CSSKeywordValue.

Exceptions

TypeError: Thrown if the value parameter is not specified or it is not of type String.

Examples

The following example resets the CSS display property to its defaults, setting the inline style attribute to style="display: initial" if viewed in the developer tools inspector.

#myElement {
  display: flex;
}

<div id="myElement">
  Check the developer tools to see the log in the console and to inspect the
  style attribute on this div.
</div>

const keyword = new CSSKeywordValue("initial");
const myElement = document.getElementById("myElement").attributeStyleMap;
myElement.set("display", keyword);

console.log(myElement.get("display").value); // 'initial'
console.dir(keyword);

Specifications

Specification
CSS Typed OM Level 1 # dom-csskeywordvalue-csskeywordvalue

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`CSSKeywordValue()` constructor	Chrome – Full support Chrome 66 (Release date: 2018-04-17) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – No support Firefox footnote footnote See bug 1278697	Opera – Full support Opera 53 (Release date: 2018-05-10) footnote Full support	Safari – Full support Safari 16.4 (Release date: 2023-03-27) footnote Full support	Chrome Android – Full support Chrome Android 66 (Release date: 2018-04-17) footnote Full support	Firefox for Android – No support Firefox for Android footnote footnote See bug 1278697	Opera Android – Full support Opera Android 47 (Release date: 2018-07-23) footnote Full support	Safari on iOS – Full support Safari on iOS 16.4 (Release date: 2023-03-27) footnote Full support	Samsung Internet – Full support Samsung Internet 9 (Release date: 2018-09-15) footnote Full support	WebView Android – Full support WebView Android 66 (Release date: 2018-04-17) footnote Full support	WebView on iOS – Full support WebView on iOS 16.4 (Release date: 2023-03-27) footnote Full support

Tip: you can click/tap on a cell for more information.

Full support: Full support
No support: No support
: See implementation notes.

This page was last modified on Apr 10, 2025 by MDN contributors.

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