ParentNode | Web API

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方法
规范
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ParentNode mixin contains methods and properties that are common to all types of 节点 objects that can have children. It's implemented by 元素 , Document ，和 DocumentFragment 对象。

见使用选择器定位 DOM 元素 to learn how to use CSS 选择器 to find nodes or elements of interest.

特性

ParentNode.childElementCount 只读: Returns the number of children of this ParentNode which are elements.
ParentNode.children 只读: 返回实时 HTMLCollection 包含所有的 元素 对象，其是子级在此 ParentNode ，省略其所有非元素节点。
ParentNode.firstElementChild 只读: Returns the first node which is both a child of this ParentNode and is also an 元素 ，或 null 若没有。
ParentNode.lastElementChild 只读: Returns the last node which is both a child of this ParentNode and 是 元素 ，或 null 若没有。

方法

ParentNode.append(): Inserts a set of 节点 对象或 DOMString objects after the last child of the ParentNode . DOMString objects are inserted as equivalent 文本 节点。
ParentNode.prepend(): Inserts a set of 节点 对象或 DOMString objects before the first child of the ParentNode . DOMString objects are inserted as equivalent 文本 节点。
ParentNode.querySelector(): 返回第一 元素 with the current element as root that matches the specified group of selectors.
ParentNode.querySelectorAll(): 返回 NodeList representing a list of elements with the current element as root that matches the specified group of selectors.
ParentNode.replaceChildren()

规范

规范	状态	注释
DOM The definition of 'ParentNode' in that specification.	实时标准	Split the `ElementTraversal` interface into `ChildNode` and `ParentNode` 。 `ParentNode.firstElementChild` , `ParentNode.lastElementChild` ，和 `ParentNode.childElementCount` properties are now defined on the latter. Added the `ParentNode.children` property, and the `ParentNode.querySelector()` , `ParentNode.querySelectorAll()` , `ParentNode.append()` ，和 `ParentNode.prepend()` 方法。
Element Traversal Specification The definition of 'ElementTraversal' in that specification.	过时	Added the initial definition of its properties to the `ElementTraversal` pure interface and used it on `元素` .

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
`ParentNode`	Chrome 1	Edge 12	Firefox 3.5	IE 9	Opera 10	Safari 4	WebView Android Yes	Chrome Android Yes	Firefox Android 4	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes
`append`	Chrome 54	Edge 17	Firefox 49	IE No	Opera 39	Safari 10	WebView Android 54	Chrome Android 54	Firefox Android 49	Opera Android 41	Safari iOS 10	Samsung Internet Android 6.0
`childElementCount`	Chrome 1	Edge 12	Firefox 3.5	IE 9	Opera 10	Safari 4	WebView Android Yes	Chrome Android Yes	Firefox Android 4	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes
`children`	Chrome 1	Edge 12	Firefox 3.5	IE 9 9 Internet Explorer 6, 7 and 8 supported it, but erroneously includes `注释` 节点。	Opera 10	Safari 4	WebView Android 1	Chrome Android 18	Firefox Android 4	Opera Android 10.1	Safari iOS 9	Samsung Internet Android 1.0
Support on `Document` and `DocumentFragment`	Chrome 29	Edge ≤79	Firefox 25	IE No	Opera 16	Safari No	WebView Android Yes	Chrome Android Yes	Firefox Android ?	Opera Android ?	Safari iOS No	Samsung Internet Android Yes
`firstElementChild`	Chrome 1	Edge 12	Firefox 3.5	IE 9	Opera 10	Safari 4	WebView Android Yes	Chrome Android Yes	Firefox Android 4	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes
`lastElementChild`	Chrome 1	Edge 12	Firefox 3.5	IE 9	Opera 10	Safari 4	WebView Android Yes	Chrome Android Yes	Firefox Android 4	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes
`prepend`	Chrome 54	Edge 17	Firefox 49	IE No	Opera 39	Safari 10	WebView Android 54	Chrome Android 54	Firefox Android 49	Opera Android 41	Safari iOS 10	Samsung Internet Android 6.0
`querySelector`	Chrome 1	Edge 12	Firefox 3.5	IE 9 9 Internet Explorer 8 only supported CSS2 selectors.	Opera 10	Safari 4	WebView Android ≤37	Chrome Android 18	Firefox Android Yes	Opera Android 10.1	Safari iOS 3.2	Samsung Internet Android Yes
`querySelectorAll`	Chrome 1	Edge 12	Firefox 3.5	IE 9 9 Internet Explorer 8 only supported CSS2 selectors.	Opera 10	Safari 4	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android 10.1	Safari iOS 3.2	Samsung Internet Android Yes
`replaceChildren`	Chrome No	Edge No	Firefox 78	IE No	Opera No	Safari 14	WebView Android No	Chrome Android No	Firefox Android No	Opera Android No	Safari iOS 14	Samsung Internet Android No

图例

完整支持
不支持
兼容性未知 ?
实验。期望将来行为有所改变。

另请参阅

ChildNode 纯接口。
Object types implementing this mixin: Document , 元素 ，和 DocumentFragment .

元数据

最后修改： Jun 3, 2020

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特性

方法

规范

浏览器兼容性

图例

另请参阅

相关话题