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AngularJS ng-keydown 指令


示例

在每次按键时执行表达式

<input ng-keydown="count = count + 1" ng-init="count=0" />

<h1>{{count}}</h1>
亲自试一试 »

定义和用法

ng-keydown 指令告诉 AngularJS 在特定 HTML 元素上使用键盘时该做什么。

来自 AngularJS 的 ng-keydown 指令不会覆盖元素的原始 onkeydown 事件,两者都会被执行。

按键的顺序是

1. Keydown

2. Keypress

3. Keyup


语法

<元素 ng-keydown="表达式"></元素>

受 <input>、<select>、<textarea> 和其他可编辑元素支持。


参数值

描述
表达式 按下键时要执行的表达式。

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