Note: This feature is available in Web Workers.
The value property of the CSSKeywordValue interface represents the keyword as a string.
A string.
TypeErrorThrown if the value property is set to an empty String.
The following example resets the CSS display property to its defaults.
let indicator = document.getElementById("indicator");
indicator.attributeStyleMap.set("display", new CSSKeywordValue("initial"));
indicator.attributeStyleMap.get("display").value; // 'initial'