vue学习10 v-for指令

vue学习10 v-for指令

vue学习10 v-for指令

v-for指令的作用是：根据数据生成列表结构

数组经常和v-for结合使用，语法是(item,index) in 数据

数组长度的更新会同步到页面上，是响应式更新

练习代码：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <input type="button" value="添加数据" @click="add">
        <input type="button" value="移除数据" @click="remove">
        <ul>
            <li v-for = "(it,index) in arr">
                {{index+1}} 侠客小飞学习:{{it}}
            </li>
        </ul>

        <h2 v-for = "item in vegetables" v-bind:title="item.name"> 
            {{ item.name }}
        </h2>
        
    </div>
    <script src="js/vue.js"></script>
    <script>
        var app = new Vue({
            el:"#app",
            data: {
                arr: ["C语言","java","python","html"],
                vegetables:[
                {name:"土豆肉丝盖饭"},
                {name:"韭菜鸡蛋盖饭"},
                ]
            },
            methods:{
                add: function(){
                    this.vegetables.push({name:"西红柿鸡蛋盖饭"});
                },
                remove: function(){
                    this.vegetables.shift();
                }
            },
        })
    </script>
</body>
</html>