创建一个div,在div上按键盘中的上下左右,这个div会根据你所按的键盘来进行移动,每次移动10px,上哈左右,div会有四个颜色变化,div中的蚊子随着上下左右而变化, 不能穿出图片 超出弹出提示框
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- CSDN专家-赖老师(软件之家) 2021-11-12 20:27关注
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>方向键移动div</title> <style> #box1 { width: 200px; height: 200px; background-color: aqua; position: absolute; } </style> <script> window.onload = function () { var b1 = document.getElementById("box1"); var distance = 10; alert("按下ctrl键加速,按下alt键减速"); document.onkeydown = function (event) { event = event || window.event; if (event.ctrlKey) { distance = 40; } if (event.shiftKey) { distance = 5; } if (event.keyCode === 37) { b1.style.left = b1.offsetLeft - distance + "px"; } else if (event.keyCode === 38) { b1.style.top = b1.offsetTop - distance + "px"; } else if (event.keyCode === 39) { b1.style.left = b1.offsetLeft + distance + "px"; } else if (event.keyCode === 40) { b1.style.top = b1.offsetTop + distance + "px"; } }; }; </script> </head> <body> <div id="box1"></div> </body>
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