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JS实现鼠标框选效果完整实例

2019-11-20 09:39:13
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本文实例讲述了JS实现鼠标框选效果的方法。分享给大家供大家参考,具体如下:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>鼠标框选效果</title><style>  *{  padding:0;  margin:0;  }  #bottom{  position:absolute;  bottom:0px;  width:100%;  height:40px;  border:1px solid #000;  background:#000;  color:#fff;  }  .tempDiv{  border:1px dashed blue;  background:#5a72f8;  position:absolute;  width:0;  height:0;  filter:alpha(opacity:10);  opacity:0.1  }</style><script type = "text/javascript">  window.onload = function(){  var stateBar = document.getElementById("bottom");  document.onmousedown = function(e){   var posx = e.clientX;   var posy = e.clientY;   var div = document.createElement("div");   div.className = "tempDiv";   div.style.left = e.clientX+"px";   div.style.top = e.clientY+"px";   document.body.appendChild(div);   document.onmousemove = function(ev){    div.style.left = Math.min(ev.clientX, posx) + "px";    div.style.top = Math.min(ev.clientY, posy) + "px";    div.style.width = Math.abs(posx - ev.clientX)+"px";    div.style.height = Math.abs(posy - ev.clientY)+"px";    stateBar.innerHTML = "MouseX: " + ev.clientX + "<br/>MouseY: " + ev.clientY;    document.onmouseup = function(){     div.parentNode.removeChild(div);     document.onmousemove = null;     document.onmouseup = null;    }   }  }}</script></head><body>   <div id = "bottom"></div></body></html>

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希望本文所述对大家JavaScript程序设计有所帮助。

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