表单全选取消全选

要求：点击最上方富文本框全选下方所有富文本框，点击下方所有富文本框选中最上方富文本框

效果展示


快速生成代码

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.wrap>table>(thead>tr>(th>input:checkbox[id="selAll"])+th{商品}+th{价钱})+tbody>(tr>(td>input:checkbox)+td{iPhone8}+td{8000})+(tr>(td>input:checkbox)+td{iPad Pro}+td{5000})+(tr>(td>input:checkbox)+td{iPad Air}+td{2000})+(tr>(td>input:checkbox)+td{Apple Watch}+td{2000})

快速生成框架

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.wrap>table>(thead>tr>(th>input:checkbox[id="selAll"])+th*2)+tbody>tr*4>(td>input:checkbox)+td*2

标签

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<!-- index.html -->
<div class="wrap">
    <table>
        <thead>
            <tr>
                <th>
                    <input type="checkbox" id="selAll">
                </th>
                <th>商品</th>
                <th>价钱</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>
                    <input type="checkbox">
                </td>
                <td>iPhone8</td>
                <td>8000</td>
            </tr>
            <tr>
                <td>
                    <input type="checkbox">
                </td>
                <td>iPad Pro</td>
                <td>5000</td>
            </tr>
            <tr>
                <td>
                    <input type="checkbox">
                </td>
                <td>iPad Air</td>
                <td>2000</td>
            </tr>
            <tr>
                <td>
                    <input type="checkbox">
                </td>
                <td>Apple Watch</td>
                <td>2000</td>
            </tr>
        </tbody>
    </table>
</div>

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* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    word-wrap: break-word;
    -webkit-tap-highlight-color: transparent;
    word-break: break-all;
}
table {
    margin: 120px auto 0;
    border-collapse: collapse;
}
input {
    cursor: pointer;
}
thead tr *,
tbody tr * {
    padding: 10px;
    border: 1px solid #999;
}
thead {
    background-color: rgb(69, 122, 214);
    color: #fff;
}
thead tr th {
    padding: 10px 20px;
}
thead tr th:nth-child(2) {
    width: 200px;
}
tbody tr {
    background-color: #f0f0f0;
}
tbody tr:hover {
    cursor: pointer;
    background-color: #fafafa;
}
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var selAll = document.getElementById("selAll")
var cks = document.querySelector('tbody').querySelectorAll('input')
selAll.onclick = function() {
    for(var i = 0; i < cks.length; i++) {
        cks[i].checked = this.checked
    }
}
for(var i = 0; i < cks.length; i++) {
    cks[i].onclick = function() {
        var flag = true
        for(var i = 0; i < cks.length; i++) {
            if(!cks[i].checked) {
                flag = false
                break
            }
        }
        selAll.checked = flag
    }
}
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// 获取全选按钮
var selAll = document.getElementById("selAll")
// 获取单个按钮
var cks = document.querySelector('tbody').querySelectorAll('input')

selAll.onclick = function() {
    cks.forEach(x => x.checked = this.checked)
}

cks.forEach(x => {
    x.onclick = function() {
        let flag = true
        cks.forEach(y => {
            if(!y.checked) {
                flag = false
                return
            }
        })
        selAll.checked = flag
    }
})