CSSStyleRule: styleMap property

The styleMap read-only property of the CSSStyleRule interface returns a StylePropertyMap object which provides access to the rule's property-value pairs.

Value

A StylePropertyMap object.

Example

The following example shows styleMap being used to modify a style using the StylePropertyMap.set() method.

js
const stylesheet = document.styleSheets[0];

Object.values(stylesheet.cssRules).forEach((block) => {
  if (block.selectorText === "button") {
    block.styleMap.set("--main-color", "black");
  }
});

Specifications