TreeWalker.previousNode()

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句法
范例
规范
浏览器兼容性
另请参阅
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TreeWalker.previousNode() method moves the current 节点 to the previous visible node in the document order, and returns the found node. It also moves the current node to this one. If no such node exists,or if it is before that the root node defined at the object construction, returns null and the current node is not changed.

句法

node = treeWalker.previousNode();

范例

var treeWalker = document.createTreeWalker(
    document.body,
    NodeFilter.SHOW_ELEMENT,
    { acceptNode: function(node) { return NodeFilter.FILTER_ACCEPT; } },
    false
);
var node = treeWalker.previousNode(); // returns null as there is no parent

规范

规范	状态	注释
DOM The definition of 'TreeWalker.previousNode' in that specification.	实时标准	无变化自 Document Object Model (DOM) Level 2 Traversal and Range Specification
Document Object Model (DOM) Level 2 Traversal and Range Specification The definition of 'TreeWalker.previousNode' in that specification.	过时	初始定义。

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
`previousNode`	Chrome 1	Edge 12	Firefox 4	IE 9	Opera 9	Safari 3	WebView Android 3	Chrome Android Yes	Firefox Android 4	Opera Android 10.1	Safari iOS 3	Samsung Internet Android Yes

图例

完整支持

另请参阅

TreeWalker interface it belongs to.

元数据

最后修改： 2019 年 3 月 23 日

DOM (文档对象模型)
TreeWalker
特性
1. currentNode
2. ~~expandEntityReferences~~
3. filter
4. root
5. whatToShow
方法
1. firstChild()
2. lastChild()
3. nextNode()
4. nextSibling()
5. parentNode()
6. previousNode()
7. previousSibling()
DOM 相关页面

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句法

范例

规范

浏览器兼容性

图例

另请参阅

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