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• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

The read-only property returns an integer that represents the number of style declarations in this CSS declaration block.

句法

var num = styles.length;
					

值

An integer that provides the number of styles explictly set on the parent of the instance.

范例

The following gets the number of explicitly set styles on the following HTML element:

<div id="div1" style="margin: 0 10px; background-color: #CA1; font-family: monospace"></div>
					

JavaScript code:

var myDiv = document.getElementById('div1'); var divStyle = myDiv.style; var len = divStyle.length; // 6
					

规范

规范	状态	注释
CSS Object Model (CSSOM) The definition of 'CSSStyleDeclaration.length' in that specification.	工作草案
Document Object Model (DOM) Level 2 Style Specification The definition of 'CSSStyleDeclaration' in that specification.	过时

浏览器兼容性

The compatibility table in 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
length	Chrome 1	Edge 12	Firefox 1	IE Yes	Opera Yes	Safari 6	WebView Android 4.4	Chrome Android 18	Firefox Android 4	Opera Android Yes	Safari iOS Yes	Samsung Internet Android 1.0

图例

完整支持

完整支持

元数据

• 最后修改： Aug 20, 2019

相关话题

1. CSS Object Model
2. CSSStyleDeclaration
3. 特性

   1. length
   2. parentRule
4. 方法

   1. getPropertyCSSValue()
   2. getPropertyPriority()
   3. getPropertyValue()
   4. item()
   5. removeProperty()
   6. setProperty()
5. 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. CSSStyleRule
   13. CSSStyleSheet
   14. CSSSupportsRule
   15. CaretPosition
   16. LinkStyle
   17. MediaQueryList
   18. MediaQueryListListener
   19. Screen
   20. StyleSheet
   21. StyleSheetList
   22. TransitionEvent