vue.js2.0自定义过滤器

<template>
    <div>
        <input v-model="filterText"/>
       <ul>
           <li v-for="item in obj">
               <span>{{myfilter(item.label)}}</span>
           </li>
       </ul>
    </div>
</template>
<script>
    export default {
        data: function () {
            return{
                obj:[
                    {value:0,label:"男子十年盗窃被抓9次"},
                    {value:1,label:"中国人拯救地球"},
                    {value:2,label:"张艺谋电影"},
                    {value:3,label:"科幻电影排行榜"},
                    {value:4,label:"香港武打片电影"},
                    {value:5,label:"懒人建站：http://www.51xuediannao.com"}
                ],
                filterText:""
            }
        },
        methods:{
            myfilter(value){
                if(value.indexOf(this.filterText)>-1){
                    return value
                }
            }
        }
    };
</script>