vue实现简单的全选、单选问题

Vue全选与单选实现技巧

最新推荐文章于 2024-06-19 16:55:13 发布

原创最新推荐文章于 2024-06-19 16:55:13 发布 · 1.4k 阅读

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#vue #全选、单选

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本文介绍了在Vue.js中如何实现全选和单选功能的详细步骤，包括使用v-model绑定数据，通过计算属性控制全选状态，以及监听勾选事件来更新相关选项。通过对复选框的双向数据绑定，轻松实现数据与视图的同步。

<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Document</title>
</head>

<body>
    <div id="app">
        <ul>
            <li>
                <input type="checkbox" @change="checkAllHandle" v-model="checkedAll" />全选
            </li>
            <li v-for="(item,i) in people" :key="i">
                <input type="checkbox" @change="setOneCheckstate(i)" :checked="item.checked" />{{ item.name }}
            </li>
        </ul>
    </div>
    <script src="./libs/vue.js"></script>
    <script>
        var app = new Vue({
            el: '#app',
            data: {
                checkedAll: false,
                people: [
                    {
                        checked: false,
                        id: 1,
                        name: '沈剑心'
                    },
                    {
                        checked: true,
                        id: 2,
                        name: '小明'
                    },
                    {
                        checked: false,
                        id: 3,
                        name: '小智'
                    },
                    {
                        checked: false,
                        id: 4,
                        name: '皮卡丘'
                    }
                ]
            },
            methods: {
                checkAllHandle() {
                    this.people.foreach((item, i) => {
                        this.people[i].checked = this.checkedAll;
                    })
                },
                setOneCheckstate(i) {
                    this.people[i].checked = !this.people[i].checked;
                    // if (
                    //     this.people.filter(item => item.checked).length ==
                    //     this.people.length
                    // ) {
                    //     this.checkedAll = true;
                    // } else {
                    //     this.checkedAll = false;
                    // }
                    const selectedPeople = this.people.filter(function (item) {
                        return item.checked;
                    });
                    // 判断一下选中的数据的长度是否等于总数据的长度
                    if (selectedPeople.length === this.people.length) {
                        this.checkedAll = true;
                    } else {
                        this.checkedAll = false;
                    }
                },
                checkAllHandle() {
                    this.people.forEach((item, i) => {
                        this.people[i].checked = this.checkedAll;
                    });
                },
            }      
      });
    </script>
</body>

</html>