justlive-tears
<!DOCTYPE html>
<html>

    <head>
        <meta charset="UTF-8">
        <title></title>
        <style type="text/css">
            #bbb {
                height: 300px;
                width: 300px;
                background-color: aliceblue;
                position: relative;
            }
        </style>
        <script src="../jquery-3.2.1/jquery-3.2.1.js"></script>
        <script type="text/javascript">
            $(function() {

                $("#left").click(function() {
                    $("div:not(:animated)").animate({
                        left: "-=100"
                    }, 50);
                });
                $("#right").click(function() {
                    $("div:not(:animated)").animate({
                        left: "+=100"
                    }, 50);
                });
                $("#up").click(function() {
                    $("div:not(:animated)").animate({
                        top: "-=100"
                    }, 50);
                });
                $("#down").click(function() {
                    $("div:not(:animated)").animate({
                        top: "+=100"
                    }, 50);
                });
            })
            $(document).keydown(function() {
                if(event.keyCode == \'37\') {
                    $("div:not(:animated)").animate({
                        left: "-=100"
                    }, 50);
                }
                if(event.keyCode == \'39\') {
                    $("div:not(:animated)").animate({
                        left: "+=100"
                    }, 50);
                }
                if(event.keyCode == \'38\') {
                    $("div:not(:animated)").animate({
                        top: "-=100"
                    }, 50);
                }
                if(event.keyCode == \'40\') {
                    $("div:not(:animated)").animate({
                        top: "+=100"
                    }, 50);
                }
            })
        </script>
    </head>

    <body>
        <button id="left">left</button>
        <button id="right">right</button>
        <button id="up">up</button>
        <button id="down">down</button>
        <div id="bbb"></div>

    </body>

</html>

代码通过添加keydown方法,实现通过键盘操作div框移动的功能。

 

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