<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>阻止事件冒泡</title>
</head>
<body>
<div>
    <p>
        <span>点我</span>
    </p>
</div>
<script src="jquery-3.3.1.min.js"></script>
<script>
    $("span").click(function (e) {
        alert("span");
        e.stopPropagation();
    });

    $("p").click(function () {
        alert("p");
    });
    $("div").click(function () {
        alert("div");
    })
</script>
</body>
</html>