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compositionupdate 事件触发于字符被输入到一段文字的时候(这些可见字符的输入可能需要一连串的键盘操作、语音识别或者点击输入法的备选词)

Bubbles Yes
Cancelable No
Target objects Element
Interface TouchEvent


Property Type Description
target 只读 EventTarget 焦点所在的,处理文字输入的元素。
type 只读 DOMString The type of event.
bubbles 只读 boolean Does the event normally bubble?
cancelable 只读 boolean Is it possible to cancel the event?
view 只读 WindowProxy Document.defaultView (the window of the document).
detail 只读 long (float) 0.
data 只读 DOMString (string) 要被替换掉的字符串,如果输入时没有字符串被选,则为空字符串。只读。
locale 只读 DOMString (string) 输入事件的语言代号,或者空字符串。只读。


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Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes)[1] 9.0 (9.0)[2] (Yes) 未实现 ?
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? 9.0 (9.0)[2] ? ? ?

[1] 在 compositionstart 事件之后不会立即执行。

[2] compositionupdate 事件在编辑器里的内容改变之前就会触发。自从 Gecko 12.0 (Firefox 12.0 / Thunderbird 12.0 / SeaMonkey 2.9) 开始, input 事件在输入过程中、内容变化后就触发。使用它可以在输入过程中就获得新的内容。

Gecko 在可信事件(trusted events)中还不支持 locale 属性。但是开发者可以在使用 initCompositionEvent() 创建不可信事件时指定一个值。



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