jQuery的点击事件与CSS的hover

        <!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>jQuery的点击事件与CSS的hover</title>
            <style>
                .aa > div {
                    width: 100px;
                    height: 50px;
                    border: 1px solid yellowgreen;
                    background-color: yellow;
                    transition: all 0.5s ease;
                }
                .aa > div:hover {
                    width: 200px;
                    background-color: turquoise;
                }
                .bb {
                    width: 200px;
                    height: 100px;
                    background-color: yellowgreen;
                }
            </style>
            <script src="jquery-3.6.0.js"></script>
            <script>
                $(function(){
                    $(".aa").children().eq(3).css("color","red").prev().css("color","blue").prev().css("color","green");
        
                    // $(".bb").next().click(function(){
                    //     $(this).prev().toggle();
                    // })
        
                    $(".bb").next().click(function(){
                        $(this).prev().hide(1000,"swing",function(){
                            $(this).show(1000,"swing");
                        });
                    })
                })
            </script>
        </head>
        <body>
            <div class="aa">
                <div>111</div>
                <div>222</div>
                <div>333</div>
                <div>444</div>
                <div>555</div>
                <div>666</div>
            </div>
            <br>
            <div class="bb"></div>
            <input type="button" value="开关">
        </body>
        </html>