W260426/11.复习/1.事件冒泡.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>
        .box {
            width: 500px;
            height: 500px;
            background-color: #f00;
        }

        .box1 {
            width: 300px;
            height: 300px;
            background-color: #ff0;
        }
    </style>
</head>

<body>
    <div class="box">
        <div class="box1"></div>
    </div>
    <script>
        // 事件三节段：事件捕获 目标阶段 事件冒泡
        const box = document.querySelector(".box");
        const box1 = document.querySelector(".box1");
        // box.onclick = function () {
        //     console.log("box");
        // }
        // box1.onclick = function () {
        //     console.log("box1");
        // }
        //true 事件捕获阶段
        // false 事件冒泡阶段
        box.addEventListener('click', function () {
            console.log("box");
        }, false)
        box1.addEventListener('click', function () {
            console.log("box1");
        }, false)
    </script>
</body>

</html>