l108/test2.php


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        input{
            display: inline-block;
            font-family: sans-serif;
        }
        span{
            font-family: sans-serif;
        }
        input[type=checkbox]{
            appearance: none;
        }
        label{
            border: 1px solid black;
            width: 40px;
            height: 20px;
            border-radius: 20px;
            cursor: pointer;
            vertical-align: -7px;
        }
        label::after{
            content: "";
            width: 18px;
            height: 18px;
            border-radius: 18px;
            margin: 1px 0px 0px 1px;
            background-color: black;
            position: absolute;
            transition: 0.5s ease margin-left;
        }
        input[type=checkbox]:checked + label::after{
            margin-left: 21px;
        }
        label{
            display: inline-block;
        }
        .checkboxcontainer{
            display: block;
            padding: 4px;
        }
        .veld{
            display: inline-block;
            padding: 5px;
            width: 120px;
            text-align: end;
        }
        body{
            transition: 0.3s linear background-color;
        }
    </style>
</head>
<body>
    <?php 
        for($i = 0; $i < 4000; $i++){
            echo "<input type='checkbox' id='$i' onchange='change()'><label for='$i'></label>";
        }
    ?>
    <script>
        function change(){
            document.body.style.backgroundColor = "hsl(" + Math.floor(Math.random() * 360) + ", 100%, 50%)"
        }
    </script>
</body>
</html>
Resultaat

Made by Thijs Aarnoudse