KeyboardEvent.isComposing
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
KeyboardEvent.isComposing 只读属性，返回一个 Boolean 值，表示该事件是否在 compositionstart 之后和 compositionend 之前被触发。
语法
var bool = event.isComposing;
示例
js
var kbdEvent = new KeyboardEvent("syntheticKey", false);
console.log(kbdEvent.isComposing); // return false
规范
| Specification |
|---|
| UI Events # dom-keyboardevent-iscomposing |
浏览器兼容性
BCD tables only load in the browser