TodoList 循环及双向绑定.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://unpkg.com/vue@next"></script>
</head>

<body>
    <div id="root"></div>



</body>
<script>
    // 1 通过li标签把list循环打印 v-for 循环打印（元素 of 列表）元素后也可以接下标打印index
    // Vue.createApp({
    //     data() {

    //         return {
    //             list: ['hello', 'world', 'dell', 'lee']
    //         }
    //     },
    //     template: `
    //     <ul>
    //         <li v-for = "(item, index) of list">{{item}} {{index}}</li>
    //     </ul>
    //     `
    // }).mount('#root')

    // 2 双向绑定 v-model 将template 与 data 中设的事件绑定
    Vue.createApp({
        data() {
            return {
                inputValue: '',
                list: []
            }
        },
        methods: {
            handlaAppItem() {
                this.list.push(this.inputValue);
                this.inputValue = '';
            }
        },
        template: `
        <div>
            <input v-model = "inputValue"/>
            <button v-on:click = "handlaAppItem">增加</button>
            <ul>
                <li v-for = "(item, index) of list">{{item}} {{index}}</li>
            </ul>
        </div>
        `
    }).mount('#root')


</script>

</html>