<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>帖子详情</title>
<script src="js/vue.min.js"></script>
<style>
*{
margin: 0 auto;
padding: 0;
}
.box{
width: 100%;
height: 100%;
position: fixed;
background: rgba(0,0,0,.2);
}
.abc{
width: 500px;
height: 500px;
border:1px solid red;
position: absolute;
}
</style>
</head>
<body>
<div class="box">
<div ref='wh' class="abc">
yaohuiqian1
</div>
</div>
<script>
new Vue({
el: '.box',
mounted(){
let h = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
let w = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;
let l = w/2-this.$refs.wh.offsetWidth/2;
let t = h/2-this.$refs.wh.offsetHeight/2;
this.$refs.wh.style.left=l+"px"
this.$refs.wh.style.top=t+"px"
}
})
</script>
</body>
</html>