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Range.commonAncestorContainer 只读属性，返回目标节点的共有祖先节点。因而需要注意：selectNode方法中的该值为目标节点的父节点，selectNodeContents方法中的该值为其本身。
在某些跨节点的选取操作时，取得最大"公约数"的节点为commonAncestorContainer。即Range.startContainer 和 Range.endContainer 相同的节点是目标节点的 共有祖先节点。
更改 Node, 请使用setStart setEnd 及这两种方法的延伸方法 Range.
语法
rangeAncestor = range.commonAncestorContainer;
示例
var range = document.createRange(); range.setStart(startNode,startOffset); range.setEnd(endNode,endOffset); rangeAncestor = range.commonAncestorContainer;
特别说明
| Specification | Status | Comment |
|---|---|---|
| DOM Range.commonAncestorContainer |
Living Standard | No change. |
| Document Object Model (DOM) Level 2 Traversal and Range Specification Range.commonAncestorContainer |
Obsolete | Initial specification. |
支持度
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.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
commonAncestorContainer | Chrome Full support Yes | Edge Full support 12 | Firefox Full support 4 | IE Full support 9 | Opera Full support 9 | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Edge Mobile Full support Yes | Firefox Android Full support 4 | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android ? |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown