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• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

MutationObserverInit dictionary's optional subtree property can be set to true to monitor the targeted node and all of its descendants. The default value, false , indicates only the target node itself is to be monitored for changes.

subtree can be used in concert with the other options to extend monitoring of attributes, text content, and child lists to the entire subtree rooted at the target node.

句法

var options = {
  subtree: true | false
}
					

值

A Boolean value. The default, false , indicates that only the target node specified when calling MutationObserver.observe() is to be monitored for changes. Changing this value to true causes the entire subtree rooted at the specified target node to be monitored for the changes indicated by the other options.

For example, to watch the target node only for attribute changes, the MutationObserverInit passed into MutationObserver() 可以是：

var options = {
  attributes: true,
  subtree: false
};
					

Since the default value of subtree is false , line 3 is optional.

To monitor the entire subtree for attribute changes, simply set subtree to true :

var options = {
  attributes: true,
  subtree: true
};
					

范例

规范

规范	状态	注释
DOM The definition of 'MutationObserverInit.subtree' in that specification.	实时标准

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
subtree	Chrome 26 26 18 — 26 Prefixed Prefixed Implemented with the vendor prefix: webkit	Edge 12	Firefox 14	IE 11	Opera 15	Safari 7 7 6 — 7 Prefixed Prefixed Implemented with the vendor prefix: webkit	WebView Android ?	Chrome Android 26 26 18 — 26 Prefixed Prefixed Implemented with the vendor prefix: webkit	Firefox Android 14	Opera Android 14	Safari iOS 7 7 6 — 7 Prefixed Prefixed Implemented with the vendor prefix: webkit	Samsung Internet Android 1.5 1.5 1.0 — 1.5 Prefixed Prefixed Implemented with the vendor prefix: webkit

图例

完整支持

完整支持

兼容性未知 ?

兼容性未知

要求使用供应商前缀或不同名称。

要求使用供应商前缀或不同名称。

元数据

• 最后修改： Mar 18, 2019

相关话题

1. MutationObserverInit
2. 特性

   1. attributeFilter
   2. attributeOldValue
   3. 属性
   4. characterData