JavaScript implements checkbox selection function

This article example shares the specific code of JavaScript to achieve the selection of all checkboxes for your reference. The specific content is as follows

Code:

<!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>
    <style>
        table {
            width: 300px;
            border-spacing: 0;
            /* text-align: center; */
            margin: 100px auto;
            border-collapse: collapse;
        }
        
        table tr:nth-child(n+2)>td {
            text-align: left;
            background-color: rgb(250, 245, 245);
            color: dimgray;
            font-size: 14px;
        }
        
        table tr:nth-child(1) {
            background-color: skyblue;
            color: white;
        }
        
        th,
        td {
            padding: 10px;
            border: 0.5px solid gray;
        }
    </style>
</head>

<body>
    <table>
        <tr>
            <th><input type="checkbox" name="" id="all"></th>
            <th>Products</th>
            <th>Price</th>
        </tr>
        <tr>
            <td><input type="checkbox" name="" id="ip8"></td>
            <td>iPhone8</td>
            <td>8000</td>
        </tr>
        <tr>
            <td><input type="checkbox" name="" id="pro"></td>
            iPad Pro
            <td>5000</td>
        </tr>
        <tr>
            <td><input type="checkbox" name="" id="air"></td>
            iPad Air
            <td>2000</td>
        </tr>
        <tr>
            <td><input type="checkbox" name="" id="watch"></td>
            <td>Apple Watch</td>
            <td>2000</td>
        </tr>
    </table>

    <script>
        var all = document.getElementById('all');
        var items = document.querySelectorAll('tr>td>input');
        all.onclick = function() {
            for (var i = 0; i < items.length; i++) {
                items[i].checked = this.checked;
            }
        }


        for (var i = 0; i < items.length; i++) {
            items[i].onclick = function() {
                var flag_all = 1;
                for (var j = 0; j < items.length; j++) {
                    if (items[j].checked == 0) {
                        flag_all = 0;
                        all.checked = flag_all;
                        break;
                    }
                }
                all.checked = flag_all;
            }
        }
    </script>
</body>

</html>

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.

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