JS implements web page Div layer Clone drag and drop effect

JS implements web page Div layer Clone drag and drop effect_javascript skills

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Release： 2016-05-16 15:37:59

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The example in this article describes the JS implementation of the Clone drag and drop effect on the Div layer of the web page. Share it with everyone for your reference. The details are as follows:

This is a layer drag, an example of the drag-and-clone effect on the web page. The two layers can be moved arbitrarily by dragging the mouse. The level is intelligently judged, that is, whether it is at the highest level or not. The layer will not be blocked by other layers.

The screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/js/2015/js-draw-box-clone-style-codes/

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>拖拽--Clone</title>
<style type="text/css"> 
body,div{margin:0;padding:0;}
body{background:#3e3e3e;}
div{position:absolute;width:100px;height:100px;cursor:move;border:1px solid #888;background:#000;}
#drag1{top:100px;left:100px;}
#drag2{top:100px;left:300px;}
#temp{opacity:0.3;filter:alpha(opacity=30);}
</style>
<script type="text/javascript"> 
var zIndex = 1;
window.onload = function ()
{
 var oDrag1 = document.getElementById("drag1");
 var oDrag2 = document.getElementById("drag2");
 drag(oDrag1);
 drag(oDrag2);
};
function drag(oDrag)
{
 var disX = dixY = 0;
 oDrag.onmousedown = function (event)
 {
  var event = event || window.event;
  disX = event.clientX - this.offsetLeft;
  disY = event.clientY - this.offsetTop;  
  var oTemp = document.createElement("div");
  oTemp["id"] = "temp";
  oTemp.style.left = this.currentStyle &#63; this.currentStyle["left"] : getComputedStyle(this, null)["left"];
  oTemp.style.top = this.currentStyle &#63; this.currentStyle["top"] : getComputedStyle(this, null)["top"];
  oTemp.style.zIndex = zIndex++;
  document.body.appendChild(oTemp);
  document.onmousemove = function (event)
  {
   var event = event || window.event;
   var iL = event.clientX - disX;
   var iT = event.clientY - disY;
   var maxL = document.documentElement.clientWidth - oDrag.offsetWidth;
   var maxT = document.documentElement.clientHeight - oDrag.offsetHeight
   iL <= 0 && (iL = 0);
   iT <= 0 && (iT = 0);
   iL >= maxL && (iL = maxL);
   iT >= maxT && (iT = maxT);
   oTemp.style.left = iL + "px";
   oTemp.style.top = iT + "px";
   return false;
  };
  document.onmouseup = function ()
  {
   document.onmousemove = null;
   document.onmouseup = null;
   oDrag.style.left = oTemp.style.left;
   oDrag.style.top = oTemp.style.top;
   oDrag.style.zIndex = oTemp.style.zIndex;
   document.body.removeChild(oTemp);
   oDrag.releaseCapture && oDrag.releaseCapture()
  };
  this.setCapture && this.setCapture();  
  return false
 } 
}
</script>
</head>
<body>
<div id="drag1"></div>
<div id="drag2"></div>
</body>
</html>

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