<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Key的原理</title>
    <script type="text/javascript" src="../vue.js"></script>
</head>
<body>
<div id="root">
<!--    遍历列表-->
    <h2>人员列表</h2>
    <button @click.once="addPerson">添加一个人</button>
    <ul>
        <!--        方法一-->
        <!--        <li v-for="d in listData" :key="d.id">{{d.name}} - {{d.age}}</li>-->
        <!--        方法二-->
        <li v-for="(data, index) in listData" :key="data.id">
            {{data.name}} - {{data.age}}
            <input type="text">
        </li>

    </ul>
</div>
</body>
<script type="text/javascript">
    Vue.config.productionTip = false
    const vm = new Vue({
        el: "#root",
        data: {
            listData: [
                {id: 1, name: '张三', age: 18},
                {id: 2, name: '李四', age: 19},
                {id: 3, name: '王五', age: 20}
            ]
        },
        methods:{
            addPerson() {
                const p = {id: 0, name: "赵老大", age: 80}
                this.listData.unshift(p)
            }
        }
    })

</script>
</html>