KeyboardEvent.repeat
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
**KeyboardEvent.repeat**是一个只读属性，返回一个布尔值Boolean，如果按键被一直按住，返回值为true。
语法
var repeat = event.repeat;
规范
| Specification |
|---|
| UI Events # dom-keyboardevent-repeat |