66.event-bubbling.html

<!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>
        .rect {
            position: relative;
            width: 800px;
            height: 600px;
            background-color: rgb(248, 232, 232);
            border: 1px solid black;
        }

        .ball {
            position: absolute;
            width: 150px;
            height: 150px;
            border-radius: 50%;
            background-color: rgb(245, 216, 52);
            text-align: center;
            border: 1px solid black;
            left: 100px;
            top: 100px;
        }
    </style>
</head>

<body>
    <div class="rect">
        <div class="ball"></div>
    </div>
    <script>
        const rect = document.querySelector(".rect");
        const ball = document.querySelector(".ball");

        const handler = (event) => {
            console.log("target:", event.target);
            console.log("current target:", event.currentTarget);
            console.log(event.eventPhase);
        }

        ball.addEventListener("click", handler);
        rect.addEventListener("click", handler);
        document.addEventListener("click", handler);
        window.addEventListener("click", handler);
    </script>
</body>

</html>