Document.createDocumentFragment()

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句法
用法注意事项
范例
规范
浏览器兼容性
另请参阅
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Creates a new empty DocumentFragment into which DOM nodes can be added to build an offscreen DOM tree.

句法

var fragment = document.createDocumentFragment();

值

A newly created, empty, DocumentFragment object, which is ready to have nodes inserted into it.

用法注意事项

DocumentFragment s are DOM 节点 objects which are never part of the main DOM tree. The usual use case is to create the document fragment, append elements to the document fragment and then append the document fragment to the DOM tree. In the DOM tree, the document fragment is replaced by all its children.

Since the document fragment is in memory and not part of the main DOM tree, appending children to it does not cause page reflow (computation of element's position and geometry). Historically, using document fragments could result in better performance .

还可以使用 DocumentFragment constructor to create a new fragment:

let fragment = new DocumentFragment();

范例

This example creates a list of major web browsers in a DocumentFragment , then adds the new DOM subtree to the document to be displayed.

HTML

<ul id="ul">
</ul>

JavaScript

var element  = document.getElementById('ul'); // assuming ul exists
var fragment = document.createDocumentFragment();
var browsers = ['Firefox', 'Chrome', 'Opera',
    'Safari', 'Internet Explorer'];
browsers.forEach(function(browser) {
    var li = document.createElement('li');
    li.textContent = browser;
    fragment.appendChild(li);
});
element.appendChild(fragment);

结果

规范

规范	状态	注释
DOM The definition of 'Document.createDocumentFragment()' in that specification.	实时标准	Initial definition in the DOM 1 specification.

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
`createDocumentFragment`	Chrome 1	Edge 12	Firefox Yes	IE Yes	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

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句法

值

用法注意事项

范例

HTML

JavaScript

结果

规范

浏览器兼容性

图例

另请参阅

元数据

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