vuejs show 7b 7b 7d 7d on loading

1<p v-cloak>{{text}}</p>
2
3//js
4var app = new Vue({
5data:{
6text:'iam loading while window is loading'
7}
8})
9
10//css
11[v-cloak] > * { display:none; }
12[v-cloak]::before { //extra
13  content: " ";
14  display: block;
15  position: absolute;
16  width: 80px;
17  height: 80px;
18  background-image: url(/images/svg/loader.svg);
19  background-size: cover;
20  left: 50%;
21  top: 50%;
22}