html
<style>
#app{
position: relative; /*定位*/
top: 10px;
left: 10px;
width: 200px;
height: 200px;
background: #666; /*设置一下背景*/
}
</style>
<body>
<div id="app" @mousedown="move"> <!--绑定按下事件-->
{{positionX}}
{{positionY}}
</div>
</body>
JS
//main.js
let app = new Vue({
el:'#app',
data:{
positionX:0,
positionY:0,
},
methods:{
move(e){
let odiv = e.target; //获取目标元素
//算出鼠标相对元素的位置
let disX = e.clientX - odiv.offsetLeft;
let disY = e.clientY - odiv.offsetTop;
document.onmousemove = (e)=>{ //鼠标按下并移动的事件
//用鼠标的位置减去鼠标相对元素的位置，得到元素的位置
let left = e.clientX - disX;
let top = e.clientY - disY;
//绑定元素位置到positionX和positionY上面
this.positionX = top;
this.positionY = left;
//移动当前元素
odiv.style.left = left + 'px';
odiv.style.top = top + 'px';
};
document.onmouseup = (e) => {
document.onmousemove = null;
document.onmouseup = null;
};
}
},
computed:{},
});
指令形式
//main.js
let app = new Vue({
el:'#app',
data:{},
methods:{},
directives: {
drag: {
// 指令的定义
bind: function (el) {
let odiv = el; //获取当前元素
oDiv.onmousedown = (e) => {
//算出鼠标相对元素的位置
let disX = e.clientX - odiv.offsetLeft;
let disY = e.clientY - odiv.offsetTop;
document.onmousemove = (e)=>{
//用鼠标的位置减去鼠标相对元素的位置，得到元素的位置
let left = e.clientX - disX;
let top = e.clientY - disY;
//绑定元素位置到positionX和positionY上面
this.positionX = top;
this.positionY = left;
//移动当前元素
odiv.style.left = left + 'px';
odiv.style.top = top + 'px';
};
document.onmouseup = (e) => {
document.onmousemove = null;
document.onmouseup = null;
};
};
}
}
}
});