<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>演示VNodes必须唯一</title>
</head>
<body>
   <div id="app">
       <elem></elem>
   </div>

   <script src="../js/vue.js"></script>

   <script>
       let myVNode = {
           render:function (createElement) {
               return createElement('p','打招呼');
           }
       };

       Vue.component('elem',{
           render:function (createElement) {
               let childNode = createElement(myVNode);
               return createElement('div',[
                   childNode,childNode
               ]);
           }
       });

        let vm = new Vue({
            el:'#app'
        });
   </script>
</body>
</html>