点击增加删除class

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>点击增加删除class</title>
    <style>
        .box{
            width: 100px;
            height: 100px;
            background-color: blue;
        }
        .active {
            background-color: red;
        }
    </style>
</head>
<body>
    <div class="box"></div>
    <script src="../plugins/jquery-1.10.1.min.js"></script>
    <script>
        var $sel = $(".box");
        $sel.click(function (e) {
            e.stopPropagation();
            $(this).toggleClass("active");
        });
    </script>
</body>
</html>