vue2.0 绑定 鼠标移入移出事件-绑定class

handleOver (e) {
    console.log('移入：', e);
    e.currentTarget.className = "xxx";
},

handleOut (e) {
    console.log('移出：', e);
    e.currentTarget.className = "yyy";
},
mouseOver () {},

mouseLeave () {}