for列表渲染

v-for指令可以绑定数组的数据来渲染一个项目列表

v-for指令需要使用item in items形式的特殊语法，items是源数据数组并且item是数组元素迭代的别名。

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title></title>
    <!-- 开发环境版本 -->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
  <ol>
    <li v-for="todo in todos">
      {{ todo.text }}
    </li>
  </ol>
</div>
</body>
<script type="text/javascript">
var app = new Vue({
  el: '#app',
  data: {
   todos: [
      { text: '学习 JavaScript' },
      { text: '学习 Vue' },
      { text: '整个牛X项目' }
    ]
  }
})
</script>
</html>

效果

index

<ol>
  <li v-for="(todo,index) in todos">
    {{ todo.text }}-{{index}}
  </li>
</ol>

对象

文档

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title></title>
    <!-- 开发环境版本 -->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
  <ul>
    <li v-for="value in object">
      {{ value }}
    </li>
  </ul>
</div>
</body>
<script type="text/javascript">
var app = new Vue({
  el: '#app',
  data: {
    object: {
      title: 'How to do lists in Vue',
      author: 'Jane Doe',
      publishedAt: '2016-04-10'
    }
  }
})
</script>
</html>

效果

对象列表

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title></title>
    <!-- 开发环境版本 -->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
<div id="app">
   <ul>
    <li v-for="item in items">
      {{ item.title }}~~~{{item.author}}~~~{{item.publishedAt}}
    </li>
  </ul>
</div>
</body>
<script type="text/javascript">
var app = new Vue({
  el: '#app',
  data: {
    items: [
       {
        title: 'Vue',
        author: 'Jane Doe',
        publishedAt: '2016-04-10'
      },
      {
        title: 'python',
        author: 'Ricky',
        publishedAt: '2019-04-10'
      },
      {
        title: 'itcast',
        author: 'itcast',
        publishedAt: '2006-05-08'
      }
    ]
  }
})
</script>
</html>

效果