<!DOCTYPE html>
<html>
<head>
<title> </title>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>
<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>
<script type="text/javascript">
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 + 18;
let disY = e.clientY - odiv.offsetTop + 18;
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: {},
});
</script>
</html>
