JS实现可展开折叠层的鼠标拖曳效果

2019-11-20 11:29:07

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来源：转载

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本文实例讲述了JS实现可展开折叠层的鼠标拖曳效果。分享给大家供大家参考。具体如下：

这是一款简单JS代码实现的鼠标拖曳图层效果，比较精简，大家参考一下。鼠标点击层标题栏可实现层内容的展开与折叠，按住标题栏可实现层的拖动。

运行效果截图如下：

在线演示地址如下：

http://demo.VeVB.COm/js/2015/js-fade-out-mouse-draw-style-demo/

具体代码如下：

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>鼠标拖曳</title> </head> <body> <script type="text/javascript"> function drag(elementToDrag,event){  var startX=event.clientX,startY=event.clientY;  var origX=elementToDrag.offsetLeft,origY=elementToDrag.offsetTop;  var deltaX=startX-origX,deltaY=startY-origY;  if(document.addEventListener){    document.addEventListener("mousemove",moveHandler,true);   document.addEventListener("mouseup",upHandler,true); } else{  elementToDrag.setCapture();  elementToDrag.attachEvent("onmousemove",moveHandler);  elementToDrag.attachEvent("onmouseup",upHandler);  elementToDrag.attachEvent("onlosecapture",upHandler); } if(event.stopPropagation) event.stopPropagation(); else event.cancelBubble=true; if(event.preventDefault) event.preventDefault(); else event.returnValue=false; function moveHandler(e){  if(!e) e=window.event;  elementToDrag.style.left=(e.clientX-deltaX)+"px";  elementToDrag.style.top=(e.clientY-deltaY)+"px";  elementToDrag.style.zIndex="10";  elementToDrag.getElementsByTagName("p")[0].innerHTML="clientX:"+e.clientX+"</br>"+"clientY:"+e.clientY+"</br>"+"offsetLeft:"+origX+"</br>"+"offsetTop:"+origY+"</br>"+"clientX-offsetLeft:"+deltaX+"</br>"+"clientY-offsetTop:"+deltaY+"</br>";  if(e.stopPropagation) e.stopPropagation();  else e.cancelBubble = true; } function upHandler(e){  if(!e) e=window.event;   elementToDrag.style.zIndex="1";  if(document.removeEventListener){   document.removeEventListener("mouseup",upHandler,true);  document.removeEventListener("mousemove",moveHandler,true);  }  else{   elementToDrag.detachEvent("onlosecapture",upHandler);  elementToDrag.detachEvent("onmouseup",upHandler);  elementToDrag.detachEvent("onmousemove",moveHandler);  elementToDrag.releaseCapture();  }  if(e.stopPropagation) e.stopPropagation();  else e.cancelBubble=true; } } </script> <div style="position:absolute;left:100px;top:100px;width:250px;background-color:#789;border:1px solid #f00">  <div style="background:#ccc;border-bottom:dotted black;padding:3px;font-weight:bold" onmousedown="drag(this.parentNode,event)">Drag Me1</div> <p>test</p> </div>  <div style="position:absolute;left:100px;top:200px;width:250px;background-color:#789;border:1px solid #f00">  <div style="background:#ccc;border-bottom:dotted black;padding:3px;font-weight:bold" onmousedown="drag(this.parentNode,event)">Drag Me2</div> <p>test</p> </div>  <div style="position:absolute;left:100px;top:300px;width:250px;background-color:#789;border:1px solid #f00">  <div style="background:#ccc;border-bottom:dotted black;padding:3px;font-weight:bold" onmousedown="drag(this.parentNode,event)">Drag Me3</div> <p>test</p> </div> </body></html>

希望本文所述对大家的JavaScript程序设计有所帮助。

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