javascript - Vue.js displays a few items only when using array push -

i using vue.js in codeigniter. trying push array, displays 10 items. in console looks okay, gives me error in view.

here code

//vuejs.js this.approval_enddate = []; (var = 20; >= 0; i--) {   this.approval_enddate.push(i); }  //view.php <ol>     <li v-repeat="sem: approval_enddate">{{ sem }}</li> </ol> 

but here output

1. 20
2. 19
3. 18
4. 17
5. 16
6. 15
7. 14
8. 13
9. 12

the value 11 1 not displayed. please help. thanks!