<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
*{margin:0;padding: 0}
.box{
100px;
height: 100px;
background: red;
}
</style>
</head>
<body>
<div id="app">
<div class="box" v-drag="flag"></div>
</div>
<div data-id="0" id="box"></div>
</body>
</html>
<script src="./vue.js"></script>
<script>
Vue.directive("drag",(el,{modifiers,value})=>{
el.style.position = "absolute";
let {x,y} = modifiers;
el.addEventListener("mousedown",donw);
var disX,disY;
function donw(e){
disX = e.offsetX;
disY = e.offsetY;
document.addEventListener("mousemove",move);
document.addEventListener("mouseup",up)
}
function move(e){
var l = e.clientX - disX;
var t = e.clientY - disY;
if(value){
if(x){
el.style.left = l + 'px';
}
if(y){
el.style.top = t + 'px';
}
if(x&&y || (!x&&!y)){
el.style.left = l + 'px';
el.style.top = t + 'px';
}
}
}
function up(e){
document.removeEventListener("mousemove",move);
document.removeEventListener("mouseup",up);
}
})
new Vue({
el:"#app",
data:{
flag:true,
msg:"123"
}
})
</script>