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