JS method to realize dragging left and right to change the size of the content display area

JS method to realize dragging left and right to change the size of the content display area_javascript skills

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Release： 2016-05-16 15:36:40

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The example in this article describes the method of using JS to drag left and right to change the size of the content display area. Share it with everyone for your reference. The details are as follows:

Here is a demonstration of the effect of the left and right draggable content display area. Drag the red bar left and right to change the width of the display area. Drag to the left to display all the content on the right, and drag to the right to display all the content on the left. Similar to QQ chat Like windows, the size can be dragged up or down to suit the user's requirements. This code is completely implemented by combining JavaScript and CSS code. It has good compatibility when running in all mainstream browsers. Dragging the JS code left and right to change the size is recommended to everyone.

The screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/js/2015/js-drug-cha-area-show-demo/

The specific code is as follows:

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>左右可拖动的内容显示区</title>
<style>
ul,li{margin:0;padding:0;}
body{font:14px/1.5 Arial;color:#666;}
#box{position:relative;width:600px;height:400px;border:2px solid #000;margin:10px auto;overflow:hidden;}
#box ul{list-style-position:inside;margin:10px;}
#top,#bottom{color:#FFF;width:300px;height:400px;overflow:hidden;}
#top{background:green; float:left}
#bottom{background:skyblue;float:right}
#line{position:absolute;top:0;left:50%;height:100%;width:4px;overflow:hidden;background:red;cursor:w-resize;}
</style>
<script>
function $(id) {
 return document.getElementById(id) 
}
window.onload = function() {
 var oBox = $("box"), oTop = $("top"), oBottom = $("bottom"), oLine = $("line");
 oLine.onmousedown = function(e) {
 var disX = (e || event).clientX;
 oLine.left = oLine.offsetLeft;
 document.onmousemove = function(e) { 
  var iT = oLine.left + ((e || event).clientX - disX);
 var e=e||window.event,tarnameb=e.target||e.srcElement;
  var maxT = oBox.clientWight - oLine.offsetWidth;
  oLine.style.margin = 0;
  iT < 0 && (iT = 0);
  iT > maxT && (iT = maxT);
  oLine.style.left = oTop.style.width = iT + "px";
  oBottom.style.width = oBox.clientWidth - iT + "px";
 $("msg").innerText='top.width:'+oLine.style.width+'---bottom.width:'+oBottom.style.width+'---oLine.offsetLeft:'+oLine.offsetLeft+'---disX:'+disX+'---tarnameb:'+tarnameb.tagName;
  return false
 }; 
 document.onmouseup = function() {
  document.onmousemove = null;
  document.onmouseup = null; 
  oLine.releaseCapture && oLine.releaseCapture()
 };
 oLine.setCapture && oLine.setCapture();
 return false
 };
};
</script>
</head>
<body>
<center>左右拖动红条改变显示区域宽度<span id="msg"></span></center>
<div id="box">
 <div id="top">
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 <div id="bottom">
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 </div>
 <div id="line"></div>
</div>
</body>
</html>

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