@click="click"     //单击
@mousedown="down"       //按下
@mouseup="up"          //抬起
@dblclick="dblclick"      //双击
@mousemove="move"     //移动
@mouseleave="out"        //离开
@mouseout ="out"         //移出
@mouseenter="enter"     //进入
@mouseover="enter"        //经过