CSSStyleRule: styleMap property
        
        
          Limited availability
        
        
        
          
                
              
                
              
                
              
        
        
      
      This feature is not Baseline because it does not work in some of the most widely-used browsers.
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
| Specification | 
|---|
| CSS Typed OM Level 1> # dom-cssstylerule-stylemap> | 
Browser compatibility
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