• 第二章 Vue快速入门-- 17 v-for指令的四种使用方式


    1.v-for循环普通数组

     1 <!DOCTYPE html>
     2 <html lang="en">
     3 
     4   <head>
     5     <meta charset="utf-8">
     6     <meta name="viewport" content="width=device-width,initial-scale=1.0">
     7     <title>Document</title>
     8     <!--1.导入Vue的包-->
     9     <script src=" https://cdn.jsdelivr.net/npm/vue"></script>   
    10   </head>
    11 
    12   <body>
    13       <div id="app">
    14        <!--  <p>{{list[0]}}</p>
    15         <p>{{list[1]}}</p>
    16         <p>{{list[2]}}</p>
    17         <p>{{list[3]}}</p>
    18         <p>{{list[4]}}</p> -->
    19 
    20         <p v-for="(item,i) in list">索引值:{{i}}---每一项:{{item}}</p>
    21       </div>
    22 
    23 
    24       <script>
    25           //创建 Vue 实例,得到 ViewModel
    26           var vm =  new Vue({
    27               el:'#app',
    28         data:{
    29           list:[1,2,3,4,5,6]
    30         },
    31         methods:{}
    32           });
    33       </script>
    34   </body>
    35 </html>

    2.v-for循环对象数组

     1 <!DOCTYPE html>
     2 <html lang="en">
     3 
     4   <head>
     5     <meta charset="utf-8">
     6     <meta name="viewport" content="width=device-width,initial-scale=1.0">
     7     <title>Document</title>
     8     <!--1.导入Vue的包-->
     9     <script src=" https://cdn.jsdelivr.net/npm/vue"></script>   
    10   </head>
    11 
    12   <body>
    13     <div id="app">
    14       <p v-for="(user,i) in list">Id:{{user.id}}---名字:{{user.name}}---索引:{{i}}</p>
    15     </div>
    16 
    17 
    18     <script>
    19       //创建 Vue 实例,得到 ViewModel
    20       var vm =  new Vue({
    21         el:'#app',
    22         data:{
    23           list:[
    24              {id:1,name:'zs1'},
    25              {id:2,name:'zs2'},
    26              {id:3,name:'zs3'},
    27              {id:4,name:'zs4'}
    28           ]
    29         },
    30         methods:{}
    31       });
    32     </script>
    33   </body>
    34 </html>

    3.v-for循环对象

     1 <!DOCTYPE html>
     2 <html lang="en">
     3 
     4   <head>
     5     <meta charset="utf-8">
     6     <meta name="viewport" content="width=device-width,initial-scale=1.0">
     7     <title>Document</title>
     8     <!--1.导入Vue的包-->
     9     <script src=" https://cdn.jsdelivr.net/npm/vue"></script>   
    10   </head>
    11 
    12   <body>
    13       <div id="app">
    14       <!--注意:在遍历对象身上的键值对的时候,除了有val key ,在第三个位置还有一个索引-->
    15       <p v-for="(val,key,i) in  user">值是:{{val}}---键是:{{key}}---索引{{i}}</p>
    16       </div>
    17 
    18 
    19       <script>
    20           //创建 Vue 实例,得到 ViewModel
    21           var vm =  new Vue({
    22               el:'#app',
    23         data:{
    24           user:{
    25             id:1,
    26             name:'安迪',
    27             gender:''
    28           }
    29         },
    30         methods:{}
    31           });
    32       </script>
    33   </body>
    34 </html>

    4.v-for迭代数字

     1 <!DOCTYPE html>
     2 <html lang="en">
     3 
     4   <head>
     5     <meta charset="utf-8">
     6     <meta name="viewport" content="width=device-width,initial-scale=1.0">
     7     <title>Document</title>
     8     <!--1.导入Vue的包-->
     9     <script src=" https://cdn.jsdelivr.net/npm/vue"></script>   
    10   </head>
    11 
    12   <body>
    13       <div id="app">
    14      <!-- in后面我们放过普通数组,对象数组,对象,还可以放数字 -->
    15      <!--  注意:如果使用v-for迭代数字的话,前面的count值从1开始 -->
    16       <p v-for="count in 10">这是第{{count}}次循环</p>
    17       </div>
    18 
    19 
    20       <script>
    21           //创建 Vue 实例,得到 ViewModel
    22           var vm =  new Vue({
    23               el:'#app',
    24         data:{
    25           msg:''
    26         },
    27         methods:{}
    28           });
    29       </script>
    30   </body>
    31 </html>
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  • 原文地址:https://www.cnblogs.com/songsongblue/p/10988255.html
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