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jQuery implements simple DIV drag effect_jquery

WBOYOriginal: 2016-05-16 15:14:431149browse

The example in this article describes how to implement a simple DIV drag effect with jQuery. Share it with everyone for your reference, the details are as follows:

Create an HTML file, copy the following code into it, modify the jquery file (if you don’t have it, go to the Internet for the next one, I use jquery-1.8.2), and you can run it

<!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=gb2312" />
<title>Jquery：鼠标拖动DIV</title>
<style type="text/css">
  div#computerMove{
    position:absolute;
    top:50px;
    left:50px;
    width:200px;
    height:30px;
    line-height:30px;
    background-color:#00CCCC;
    text-align:center;
    color:#FFFFFF;
    cursor:default;
  }
</style>
</head>
<body>
  <div id="computerMove">点击我拖动</div>
  <script src="jquery-1.8.2.js" type="text/javascript"></script>
  <script type="text/javascript">
    $(document).ready(function(){
      var $div = $("div#computerMove");
      /* 绑定鼠标左键按住事件 */
      $div.bind("mousedown",function(event){
        /* 获取需要拖动节点的坐标 */
        var offset_x = $(this)[0].offsetLeft;//x坐标
        var offset_y = $(this)[0].offsetTop;//y坐标
        /* 获取当前鼠标的坐标 */
        var mouse_x = event.pageX;
        var mouse_y = event.pageY;
        /* 绑定拖动事件 */
        /* 由于拖动时，可能鼠标会移出元素，所以应该使用全局（document）元素 */
        $(document).bind("mousemove",function(ev){
          /* 计算鼠标移动了的位置 */
          var _x = ev.pageX - mouse_x;
          var _y = ev.pageY - mouse_y;
          /* 设置移动后的元素坐标 */
          var now_x = (offset_x + _x ) + "px";
          var now_y = (offset_y + _y ) + "px";
          /* 改变目标元素的位置 */
          $div.css({
            top:now_y,
            left:now_x
          });
        });
      });
      /* 当鼠标左键松开，接触事件绑定 */
      $(document).bind("mouseup",function(){
        $(this).unbind("mousemove");
      });
    })
  </script>
</body>
</html>

Readers who are interested in more jQuery-related content can check out the special topics on this site: "JQuery drag effects and skills summary", "jQuery extension skills summary", "Summary of common classic special effects of jQuery" and "Summary of jQuery animation and special effects usage"

I hope this article will be helpful to everyone in jQuery programming.

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