Angular - -ngKeydown/ngKeypress/ngKeyup 键盘事件和鼠标事件

ngKeydown/ngKeypress/ngKeyup

该指令在按键按下/按键按下/按键松开时执行指定表达式。

ngKeydown和ngKeypress略有不同，目前的测试是ngKeypress针对系统按键是无效的，而ngKeydown可以。

ngKeyup指令在按键松开的时候执行。

使用代码：

<input ng-keydown="count = count + 1" ng-init="count=0">{{count}}
<input ng-keypress="count = count + 1" ng-init="count=0">{{count}}
<input ng-keyup="count = count + 1" ng-init="count=0">{{count}}

ngMousedown/ngMouseenter/ngMouseleave/ngMousemove/ngMouseover/ngMouseup

该指令在鼠标按下/鼠标进入/鼠标离开/鼠标移动/鼠标在上面/鼠标松开时执行指定表达式。

使用代码：

<button ng-mousedown="count = count + 1" ng-init="count=0">on mouse down</button>{{count}}
<button ng-mouseenter="count = count + 1" ng-init="count=0">when mouse enter</button>{{count}}
<button ng-mouseleave="count = count + 1" ng-init="count=0">when mouse leave</button>{{count}}
<button ng-mousemove="count = count + 1" ng-init="count=0">when mouse move</button>{{count}}
<button ng-mouseover="count = count + 1" ng-init="count=0">when mouse is over</button>{{count}}
<button ng-mouseup="count = count + 1" ng-init="count=0">on mouse up</button>{{count}}

本来 不想写这几个指令的，毕竟稍简单了些.... 然后后面想想也许有些时候项目也确实需要用到，还是总结下这几个指令的用法....