dom-demo/event.html

<!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>
        .wrap {
            position: relative;
            background-color: antiquewhite;
            width: 200px;
            height: 200px;
        }
        .sub1 {
            position: absolute;
            left: 20px;
            top: 20px;
            background-color: rebeccapurple;
            width: 160px;
            height: 160px;
        }
        .sub2 {
            position: absolute;
            left: 20px;
            top: 20px;
            background-color: royalblue;
            width: 120px;
            height: 120px;
        }
    </style>
</head>
<body>
    <div id="wrap" class="wrap" onclick="didClicked()">
        <div id="sub1" class="sub1" onclick="didClicked1()">
            <div id="sub2" class="sub2" onclick="didClicked2()"></div>
        </div>
    </div>
    <script>
        // https://stackoverflow.com/questions/4616694/what-is-event-bubbling-and-capturing
        // https://www.quirksmode.org/js/events_order.html
        // preventDefault
        // stopPropagation
        document.body.addEventListener('click', (e) => {
            console.log('click body');
        }, true);
        document.getElementById('wrap').addEventListener('click', (e) => {
            console.log('click wrap');
            // e.stopPropagation();
        }, true);
        document.getElementById('sub1').addEventListener('click', (e) => {
            console.log('click sub1');
        }, true);
        document.getElementById('sub2').addEventListener('click', (e) => {
            console.log('click sub2');
            // e.stopPropagation();
        }, true);
    </script>
</body>
</html>