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Showing content from https://developer.cdn.mozilla.net/en-US/docs/Web/API/CSSRuleList/length below:

CSSRuleList: length property - Web APIs

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1. Web
2. Web APIs
3. CSSRuleList
4. length

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1. CSS Object Model (CSSOM)
2. CSSRuleList
3. Instance properties
   1. length
4. Instance methods
   1. item()
5. Related pages for CSSOM
   1. CSS
   2. CSSConditionRule
   3. CSSFontFeatureValuesRule
   4. CSSFontPaletteValuesRule
   5. CSSGroupingRule
   6. CSSImportRule
   7. CSSKeyframeRule
   8. CSSKeyframesRule
   9. CSSLayerBlockRule
   10. CSSLayerStatementRule
   11. CSSMediaRule
   12. CSSNamespaceRule
   13. CSSPageDescriptors
   14. CSSPageRule
   15. CSSPropertyRule
   16. CSSRule
   17. CSSStartingStyleRule
   18. CSSStyleDeclaration
   19. CSSStyleRule
   20. CSSStyleSheet
   21. CSSSupportsRule
   22. CaretPosition
   23. MediaList
   24. MediaQueryList
   25. Screen
   26. StyleSheet
   27. StyleSheetList
6. Guides
   1. CSS Declaration
   2. CSS Declaration Block
   3. Determining the dimensions of elements
   4. Managing screen orientation
   5. Using dynamic styling information

• Value
• Examples
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• Browser compatibility

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.

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The length property of the CSSRuleList interface returns the number of CSSRule objects in the list.

An integer.

In the following example the number of items in the CSSRuleList named myRules is printed to the console.

js

let myRules = document.styleSheets[0].cssRules;
console.log(myRules.length);

.

This page was last modified on Apr 7, 2023 by MDN contributors.

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