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AngularJS: API: ng/directive/ngKeydown

ngKeydown

  1. - directive in module ng

指定自定义行为到keydown事件上。

指令信息

  • 这个指令执行优先级为0.

用法

  • 作为属性使用:

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    <code style="box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &apos;Courier New&apos;, monospace;font-size:inherit;padding:0px;color:inherit;background-color:transparent;white-space:pre-wrap;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;"><span style="box-sizing:border-box;color:navy;"><ANY</span><span style="box-sizing:border-box;color:rgb(51, 51, 51);">

      </span><span style="box-sizing:border-box;color:teal;">ng-keydown</span><span style="box-sizing:border-box;color:rgb(51, 51, 51);">=</span><span style="box-sizing:border-box;color:rgb(221, 17, 68);">""</span><span style="box-sizing:border-box;color:navy;">></span><span style="box-sizing:border-box;color:rgb(51, 51, 51);">

    ...

    </span><span style="box-sizing:border-box;color:navy;"></ANY></span></code>

参数

参数 类型 详述
ngKeydown expression

在 keydown触发时执行的表达式 (事件对象存于$event ，并且能取到keyCode, altKey等信息)。

示例

index.html

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<code style="box-sizing:border-box;font-family:Menlo, Monaco, Consolas, &apos;Courier New&apos;, monospace;font-size:inherit;padding:0px;color:inherit;background-color:transparent;white-space:pre-wrap;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;"><span style="box-sizing:border-box;color:navy;"><input</span><span style="box-sizing:border-box;color:rgb(51, 51, 51);"> </span><span style="box-sizing:border-box;color:teal;">ng-keydown</span><span style="box-sizing:border-box;color:rgb(51, 51, 51);">=</span><span style="box-sizing:border-box;color:rgb(221, 17, 68);">"count = count + 1"</span><span style="box-sizing:border-box;color:rgb(51, 51, 51);"> </span><span style="box-sizing:border-box;color:teal;">ng-init</span><span style="box-sizing:border-box;color:rgb(51, 51, 51);">=</span><span style="box-sizing:border-box;color:rgb(221, 17, 68);">"count=0"</span><span style="box-sizing:border-box;color:navy;">></span><span style="box-sizing:border-box;color:rgb(51, 51, 51);">

key down count: {{count}}</span></code>

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