Vue 2.0 Hello World

HTML

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport"
        content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    html,body{
      padding:0;
      margin:0;
      box-sizing: border-box;
      height: 100%;
    }
    ul,li{
      list-style:none;
    }
    #app{
      overflow: hidden;
      height: 100%;
    }
    .nav{
      width: 100%;
      height: 80px;
      background: red;
      position: fixed;
      left:0;
      top:0;
    }
    .container{
      margin-top: 80px;
      width: 100%;
      height: 100%;
      overflow: auto;
      overflow-x: hidden;
    }
    .w1200{
      position: relative;
      width: 1200px;
      height: 100%;
      margin: 0 auto;
    }
    .left{
      position: fixed;
      top: 80px;
      bottom: 0;
      z-index: 2;
      width: 230px;
      height: 100%;
      overflow: auto;
      overflow-x: hidden;
    }
    .right{
      width: 100%;
      position: absolute;
      left: 0;
      top: 0;
      padding-left: 240px;
    }
    .list{
      padding-bottom: 200px;
    }
    .list li{
      padding: 10px;
    }
  </style>
</head>
<body>
  <div id="app">
    <div class="nav"></div>
    <div class="container">
      <div class="w1200">
        <div class="left">
          <ul class="list">
            <li>menum1</li>
            <li>menum2</li>
            <li>menum3</li>
            <li>menum4</li>
            <li>menum5</li>
            <li>menum6</li>
            <li>menum7</li>
            <li>menum8</li>
            <li>menum9</li>
            <li>menum10</li>
            <li>menum11</li>
            <li>menum12</li>
            <li>menum13</li>
            <li>menum14</li>
            <li>menum15</li>
            <li>menum16</li>
            <li>menum17</li>
            <li>menum18</li>
            <li>menum19</li>
           ...