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The most streamlined JavaScript method to achieve mouse dragging effect_javascript skills

WBOY
WBOYOriginal
2016-05-16 15:59:451019browse

Compared with other mouse dragging effects, this dragging effect is relatively streamlined, and it also supports mouse adsorption. It can follow the mouse movement without pressing the left mouse button; it is also relatively convenient to define, just use Just specify the ID of the DIV being dragged, and the scalability is very good. 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>鼠标拖动</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script language="JavaScript" type="text/javascript">
var drag_=false
var D=new Function('obj','return document.getElementById(obj);')
var oevent=new Function('e','if (!e) e = window.event;return e')
function Move_obj(obj){
 var x,y;
 D(obj).onmousedown=function(e){
 drag_=true;
 with(this){
  style.position="absolute";
  var temp1=offsetLeft;
  var temp2=offsetTop;
  x=oevent(e).clientX;y=oevent(e).clientY;
  document.onmousemove=function(e){
  if(!drag_)return false;
  with(this){
   style.left=temp1+oevent(e).clientX-x+"px";
   style.top=temp2+oevent(e).clientY-y+"px";
  }
  }
 }
 document.onmouseup=new Function("drag_=false");
 }
}
</script>
<body>
<div id="drag" style="background-color:#0066CC;width:280px;
height:160px;padding:20px;border:1px #003399 solid;
font-size:10.5pt;color:white" onmouseover='Move_obj("drag")'>
<p>这个层是可以拖动的，而且还可以吸附鼠标，试试看！</p>
<p>/</p>
</div>
</body>
</html>

I hope this article will be helpful to everyone’s JavaScript programming design.

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