JS实现盒子跟着鼠标移动及键盘方向键控制盒子移动效果示例

2024-05-06 16:47:56

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本文实例讲述了JS实现盒子跟着鼠标移动及键盘方向键控制盒子移动。分享给大家供大家参考，具体如下：

1. 盒子跟着鼠标移动

<!doctype html><html lang="en"><head>  <meta charset="UTF-8">  <meta name="viewport"     content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">  <meta http-equiv="X-UA-Compatible" content="ie=edge">  <title>Document</title>  <style>  *{    margin:0;    padding:0;  }    div{      width: 100px;      height: 100px;      background: red;      position: absolute;    }  </style></head><body><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><script>  document.onmousemove=function fn(ev) {    var event=window.event||ev;    var oDiv=document.getElementsByTagName("div");    for(x=0;x<oDiv.length;x++){      oDiv[x].style.transition=(x*0.5)+"s";      oDiv[x].style.left=event.clientX+"px";      oDiv[x].style.top=event.clientY+"px";    }  }</script></body></html>

2. 键盘方向键控制盒子移动

<html><head>  <meta charset="utf-8" />  <style type="text/css">    div{      width:100px;      height:100px;      background: red;      position:absolute;      left:100px;      top:100px;      transition: 0.1s;    }  </style>  <script>        window.onload = function(){      var oDiv = document.getElementById("div1");      var left = false;      var right = false;      var top = false;      var bottom = false;      document.onkeydown = function(ev){        var oEvent = ev || event;        var keyCode = oEvent.keyCode;        switch(keyCode){          case 37:            left=true;            break;          case 38:            top=true;            break;          case 39:            right=true;            break;          case 40:            bottom=true;            break;        }      };      setInterval(function(){        if(left){          oDiv.style.left = oDiv.offsetLeft-10+"px";        }else if(top){          oDiv.style.top = oDiv.offsetTop-10+"px";        }else if(right){          oDiv.style.left = oDiv.offsetLeft+10+"px";        }else if(bottom){          oDiv.style.top = oDiv.offsetTop+10+"px";        }      },50);      document.onkeyup = function(ev){        var oEvent = ev || event;        var keyCode = oEvent.keyCode;        switch(keyCode){          case 37:            left=false;            break;          case 38:            top=false;            break;          case 39:            right=false;            break;          case 40:            bottom=false;            break;        }      }    }  </script></head><body><div id="div1"></div></body></html>

希望本文所述对大家JavaScript程序设计有所帮助。

注：相关教程知识阅读请移步到JavaScript/Ajax教程频道。

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