cssbasic.html

<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body {
            min-height: 200vh;

        }
        .parent {
            position: relative;
            border: 1px solid black;
            padding: 5px;
            margin: 5px;
        }

        .child {
            padding: .25rem;
        }

        .child-1 {
            position: sticky;
            left: 0px;
            top: 0px;
            background-color: lightblue;
        }
        .child-2 {
            top: 0px;
            right: 0px;
            background-color: lightcoral;
        }
        .child-3 {
            position: sticky;
            background-color: lightgreen;
        }
        .child-4 {
            background-color: lightsalmon;
        }
    </style>
</head>
<body>
    <div class="parent parent-1">
        <div class="child child-1">One</div>
        <div class="child child-2">Two</div>
    </div>
    <div class="parent parent-2">
        <div class="child child-3">Three</div>
        <div class="child child-4">Four</div>
    </div>
    
</body>
</html>