This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

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


var cssKeywordValue = new CSSKeywordValue(val)


Sets or returns the value of the new CSSKeywordValue.


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.

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

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


Specification Status Comment
CSS Typed OM Level 1
The definition of 'CSSKeywordValue' in that specification.
Working Draft Initial definition.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
CSSKeywordValue() constructor
Chrome Full support 66Edge Full support 79Firefox No support NoIE No support NoOpera Full support 53Safari No support NoWebView Android Full support 66Chrome Android Full support 66Firefox Android No support NoOpera Android Full support 47Safari iOS No support NoSamsung Internet Android Full support 9.0


Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.