<template> <div class="hello"> <h1>{{ msg }}</h1> <h2>這里是Boor</h2> <component v-bind:my-data="items" v-bind:is="currentView">  <!-- 組件在 vm.currentview 變化時改變！ --> </component> <a class="explain">直直</a> <button v-on:click="addData">點擊</button> </div></template><script> //import $ from '@/assets/scripts/lib/zepto.min' //console.log($); //import Vue from 'vue' function isEmptyObject(e) { var t; for (t in e)  return !1; return !0 } function objectLength(o) {  var len = 0;  for(var p in o) {   len++;  }  return len; } let data ={  c_0:{c:1},  c_1:{c:2},  c_2:{c:3},  c_3:{c:4} }; let num = 0; //console.log(objectLength(data)); const MyComponent = { //template: '<h3 v-for="item in items">{{ item.c}}</h3>', props: ['myData'], data(){  return{  //items : myData  } }, render: function (createElement) {  debugger;  let items = this.myData;   //items = JSON.stringify(items);  let num = objectLength(items); if (!isEmptyObject(items)) {  debugger;  return createElement('div', Array.apply(null, { length: num }).map(function (v,index) {  return createElement('h3', items['c_'+index]['c'].toString())  })) } else {  return createElement('h1', '沒有數據!'); } } }; // 注冊 //Vue.component('my-component', MyComponent);export default { name: 'bar', data () { return {  msg: 'Bar',  fuck: 'Hello',  items: data,  currentView: MyComponent } }, methods:{ addData : function(){  for(let p in data) {   if(p == 'c_'+num) {    data[p] = {'c': num };   } else {    data['c'+num] = {'c': num };   }  }  num++; } }};</script><!-- Add "scoped" attribute to limit CSS to this component only --><style scoped>h1, h2 { font-weight: normal;}ul { list-style-type: none; padding: 0;}li { display: inline-block; margin: 0 10px;}a { color: #42b983;}</style>