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简单实现js鼠标跟随效果

2019-11-19 15:59:22
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本文实例为大家分享了js鼠标跟随效果展示的具体代码,供大家参考,具体内容如下

<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <title>Document</title>  <style>    body,div{      margin:0;      padding:0;    }    #box{      position:relative;      margin:20px auto;      width:300px;      height:300px;      background:#008000;    }    #mark{      position:absolute;      top:0;      left:0;      width:100px;      height:100px;      background:red;    }  </style></head><body>  <div id='box'>      </div>  <script>    var box = document.getElementById('box');    box.onmouseover = function(e){      e = e || window.event;      var mark = document.createElement('div');      mark.id = "mark";      this.appendChild(mark);      mark.style.left = e.clientX - this.offsetLeft + 5 + "px";      mark.style.top = e.clientY - this.offsetTop + 5 + "px";      //阻止mark盒子的onmouseover事件的冒泡传播      mark.onmouseover = function(e){        e = e || window.event;        e.stopPropagation ? e.stopPropagation():e.cancelBubble = true;      }      mark.onmouseout = function(e){        e = e || window.event;        e.stopPropagation ? e.stopPropagation():e.cancelBubble = true;      }    }    //以下代码会出现一个问题,当鼠标移动过快的时候,鼠标会进入到mark这个盒子,会触发它的mouseover行为,由于事件的冒泡传播机制,导致box的mouseover会重新被触发,导致红色盒子一直在不断的创建    box.onmousemove = function(e){      e = e || window.event;      var mark = document.getElementById('mark');      if(mark){        mark.style.left = e.clientX - this.offsetLeft + 5 + "px";        mark.style.top = e.clientY - this.offsetTop + 5 + "px";      }    }    //依然有问题:鼠标快速移动,首先会到mark上,此时浏览器在计算mark的位置,计算完成,mark到达指定的位置,此时鼠标又重新回到box上,触发了box的mouseover,也触发了mark的mouseout,也会传播到box的mouseout上,会把mark先删除,然后在创建    box.onmouseout = function(e){      e = e || window.event;      var mark = document.getElementById('mark');      if(mark){        this.removeChild(mark);      }    }    //上面代码也可以通过将over和out事件分别改为enter和leave     //onmouseenter和onmouseover都是鼠标滑上去的行为,但是onmouseenter浏览器默认阻止了它的冒泡传播(mark的onmouseenter行为触发,不会传播到box);而onmouseover是存在冒泡传播的,想要阻止的话需要手动阻止  </script></body></html>

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持武林网。

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