在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

只读 CSSStyleSheet property cssRules returns a live CSSRuleList which provides a real-time, up-to-date list of every CSS rule which comprises the stylesheet. Each item in the list is a CSSRule defining a single rule.

句法

var rules = cssStyleSheet.cssRules;
					

值

A live-updating CSSRuleList containing each of the CSS rules making up the stylesheet. Each entry in the rule list is a CSSRule object describing one rule making up the stylesheet.

范例

Individual rules within the stylesheet can then be accessed by index:

let ruleList = document.styleSheets[0].cssRules;
for (let i=0; i < ruleList.length; i++) {
  processRule(ruleList[i]);
}
					

Rules can also be accessed using for...of :

let ruleList = document.styleSheets[0].cssRules;
for (let rule of ruleList) {
  processRule(rule);
}
					

However, because CSSRule is not a proper array, you can't use forEach() .

规范

规范	状态	注释
CSS Object Model (CSSOM) The definition of 'CSSStyleSheet.cssRules' in that specification.	工作草案

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
cssRules	Chrome Yes	Edge 12	Firefox 1	IE 9	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 4	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持

完整支持

另请参阅

• CSS Object Model
• Using dynamic styling information

元数据

• 最后修改： Jun 25, 2019

相关话题

1. CSS Object Model
2. CSSStyleSheet
3. 特性

   1. cssRules
   2. ownerRule
   3. rules
4. 方法

   1. addRule()
   2. deleteRule()
   3. insertRule()
   4. removeRule()
5. 继承：

   1. StyleSheet
6. Related pages for CSSOM

   1. AnimationEvent
   2. CSS
   3. CSSConditionRule
   4. CSSGroupingRule
   5. CSSKeyframeRule
   6. CSSKeyframesRule
   7. CSSMediaRule
   8. CSSNamespaceRule
   9. CSSPageRule
   10. CSSRule
   11. CSSRuleList
   12. CSSStyleDeclaration
   13. CSSStyleRule
   14. CSSSupportsRule
   15. CaretPosition
   16. LinkStyle
   17. MediaQueryList
   18. MediaQueryListListener
   19. Screen
   20. StyleSheet
   21. StyleSheetList
   22. TransitionEvent