StyleSheetList
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The StyleSheetList interface represents a list of CSSStyleSheet objects. An instance of this object can be returned by Document.styleSheets.
It is an array-like object but can't be iterated over using Array methods. However it can be iterated over in a standard for loop over its indices, or converted to an Array.
Note:
Typically list interfaces like StyleSheetList wrap around Array types, so you can use Array methods on them.
This is not the case here for historical reasons.
However, you can convert StyleSheetList to an Array in order to use those methods (see the example below).
Instance properties
StyleSheetList.lengthRead only-
Returns the number of
CSSStyleSheetobjects in the collection.
Instance methods
StyleSheetList.item()-
Returns the
CSSStyleSheetobject at the index passed in, ornullif no item exists for that index.
Examples
Get CSSStyleSheet objects with for loop
for (const styleSheet of document.styleSheets) {
console.log(styleSheet); // A CSSStyleSheet object
}
Get all CSS rules for the document using Array methods
const allCSS = [...document.styleSheets]
.map((styleSheet) => {
try {
return [...styleSheet.cssRules].map((rule) => rule.cssText).join("");
} catch (e) {
console.log(
"Access to stylesheet %s is denied. Ignoring…",
styleSheet.href,
);
return undefined;
}
})
.filter(Boolean)
.join("\n");
Specifications
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| CSS Object Model (CSSOM) # the-stylesheetlist-interface |
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Legend
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