在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 相关话题

MutationObserverInit dictionary's optional characterData property is used to specify whether or not to monitor the node or nodes being observed for changes to their textual contents.

Character data changes are detectable on any text node, including nodes based on the 文本 , ProcessingInstruction ，和 注释 接口。

Note that this doesn't monitor content of an HTMLElement , even if it only contains text inside, as it only monitors text nodes themselves. So either pass directly a text node to the observe() method or you need to also set subtree: true .

句法

var options = {
  characterData: true | false
}
					

值

A Boolean value indicating whether or not to call the observer's callback function when textual nodes' values change.

若 true , the callback specified when observe() was used to start observing the node or subtree is called any time the contents of a text node are changed.

You can expand the capabilities of attribute mutation monitoring using other options:

• characterDataOldValue lets you specify whether or not you want the previous value of changed text nodes to be provided using the MutationRecord 's oldValue 特性。
• subtree lets you specify whether to watch the target node and all of its descendants ( true ), or just the target node ( false ).

若设置 characterDataOldValue to true , characterData is automatically assumed to be true , even if you don't expressly set it as such.

范例

规范

规范	状态	注释
DOM The definition of 'MutationObserverInit.characterData' 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
characterData	Chrome 26 26 18 — 26 Prefixed Prefixed Implemented with the vendor prefix: webkit	Edge 12	Firefox 14 注意事项 14 注意事项 Starting in Firefox 36, characterData has no default value; previously, its default value was false .	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 注意事项 14 注意事项 Starting in Firefox 36, characterData has no default value; previously, its default value was false .	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

见实现注意事项。

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