在此页

• 属性
• 方法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

CSSStyleDeclaration interface represents an object that is a CSS declaration block, and exposes style information and various style-related methods and properties.

A CSSStyleDeclaration object can be exposed using three different APIs:

• Via HTMLElement.style , which deals with the inline styles of a single element (e.g., <div style="..."> ).
• Via the CSSStyleSheet API. For example, document.styleSheets[0].cssRules[0].style 返回 CSSStyleDeclaration object on the first CSS rule in the document's first stylesheet.
• Via Window.getComputedStyle() , which exposes the CSSStyleDeclaration object as a 只读 接口。

属性

CSSStyleDeclaration.cssText

Textual representation of the declaration block. Setting this attribute changes the style.

CSSStyleDeclaration.length 只读

The number of properties. See the item() method below.

CSSStyleDeclaration.parentRule 只读

The containing CSSRule .

CSS 特性

CSSStyleDeclaration.cssFloat

Special alias for the float CSS property.

CSSStyleDeclaration named properties

Dashed and camel-cased attributes for all supported CSS properties.

方法

CSSStyleDeclaration.getPropertyPriority()

Returns the optional priority, "important".

CSSStyleDeclaration.getPropertyValue()

Returns the property value given a property name.

CSSStyleDeclaration.item()

Returns a CSS property name by its index, or the empty string if the index is out-of-bounds.

An alternative to accessing nodeList[ i ] (which instead returns undefined 当 i is out-of-bounds). This is mostly useful for non-JavaScript DOM implementations.

CSSStyleDeclaration.removeProperty()

Removes a property from the CSS declaration block.

CSSStyleDeclaration.setProperty()

Modifies an existing CSS property or creates a new CSS property in the declaration block.

CSSStyleDeclaration.getPropertyCSSValue()

Only supported via getComputedStyle in Firefox. Returns the property value as a CSSPrimitiveValue or null for shorthand properties .

范例

var styleObj = document.styleSheets[0].cssRules[0].style;
console.log(styleObj.cssText);
for (var i = styleObj.length; i--;) {
  var nameString = styleObj[i];
  styleObj.removeProperty(nameString);
}
console.log(styleObj.cssText);
					

规范

规范	状态	注释
CSS Object Model (CSSOM) The definition of 'CSSStyleDeclaration' in that specification.	工作草案	Merged the DOM Level 2 Style CSS2Properties interface into CSSStyleDeclaration .
Document Object Model (DOM) Level 2 Style Specification The definition of 'CSSStyleDeclaration' in that specification.	过时	初始定义

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
CSSStyleDeclaration	Chrome 1	Edge 12	Firefox 1	IE Yes	Opera Yes	Safari Yes	WebView Android 4.4	Chrome Android 18	Firefox Android 4	Opera Android Yes	Safari iOS Yes	Samsung Internet Android 1.0
cssFloat	Chrome 46	Edge 12	Firefox No	IE ?	Opera Yes	Safari 11	WebView Android 46	Chrome Android 46	Firefox Android No	Opera Android Yes	Safari iOS Yes	Samsung Internet Android 5.0
cssText	Chrome 1	Edge 12	Firefox 1	IE ?	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
getPropertyCSSValue 弃用	Chrome ? — 41 不支持 ? — 41 见 bug 331608 .	Edge No 不支持 No 见 bug 331608 .	Firefox 1 — 62 不支持 1 — 62 Only returns a result if called on the result of getComputedStyle() .	IE No	Opera 15 — 28 不支持 15 — 28 见 bug 331608 .	Safari 6	WebView Android ? — 41 不支持 ? — 41 见 bug 331608 .	Chrome Android ? — 41 不支持 ? — 41 见 bug 331608 .	Firefox Android 4 — 62	Opera Android 14 — 28 不支持 14 — 28 见 bug 331608 .	Safari iOS Yes	Samsung Internet Android ? — 4.0 不支持 ? — 4.0 见 bug 331608 .
getPropertyPriority	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
getPropertyValue	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
item	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
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
parentRule	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
removeProperty	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
setProperty	Chrome 1	Edge 12	Firefox 1	IE 9	Opera 9	Safari 6	WebView Android 4.4	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 6	Samsung Internet Android 1.0

图例

完整支持

完整支持

不支持

不支持

兼容性未知 ?

兼容性未知

弃用。不要用于新网站。

弃用。不要用于新网站。

见实现注意事项。

另请参阅

• CSS Properties Reference

元数据

• 最后修改： Apr 2, 2020

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