Selection.containsNode()

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句法
范例
规范
浏览器兼容性
另请参阅
相关话题

这是实验性技术
检查浏览器兼容性表格要小心谨慎在生产中使用这之前。

Selection.containsNode() method indicates whether a specfied node is part of the selection.

句法

sel.containsNode(node, partialContainment)

参数

node
partialContainment 可选: 当 true , containsNode() 返回 true when a part of the node is part of the selection. When false , containsNode() only returns true when the entire node is part of the selection. If not specified, the default value false 被使用。

范例

Check for selection

This snippet checks whether anything inside the body element is selected.

console.log(window.getSelection().containsNode(document.body, true));

Find the hidden word

In this example, a message appears when you select the secret word. It uses addEventListener() to check for selectionchange 事件。

HTML

<p>Can you find the secret word?</p>
<p>Hmm, where <span id="secret" style="color:transparent">SECRET</span> could it be?</p>
<p id="win" hidden>You found it!</p>

JavaScript

const secret = document.getElementById('secret');
const win = document.getElementById('win');
// Listen for selection changes
document.addEventListener('selectionchange', () => {
  const selection = window.getSelection();
  const found = selection.containsNode(secret);
  win.toggleAttribute('hidden', !found);
});

结果

规范

规范	状态	注释
选定 API The definition of 'Selection.containsNode()' in that specification.	工作草案	Current

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
`containsNode`	Chrome Yes	Edge 12	Firefox 4 4 Before Firefox 35, the method didn't throw if `node` was `null` .	IE No	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 4 4 Before Firefox 35, the method didn't throw if `node` was `null` .	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes
`partialContainment` parameter is optional	Chrome Yes	Edge ≤79	Firefox 55	IE No	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android 55	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持
不支持
实验。期望将来行为有所改变。

另请参阅

Selection , the interface it belongs to.

元数据

最后修改： 2020 年 1 月 22 日

DOM (文档对象模型)
Selection
特性
方法
1. addRange()
2. collapse()
3. collapseToEnd()
4. collapseToStart()
5. containsNode()
6. deleteFromDocument()
7. extend()
8. getRangeAt()
9. modify()
10. removeAllRanges()
11. removeRange()
12. selectAllChildren()
13. setBaseAndExtent()
14. toString()
DOM 相关页面

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句法

参数

范例