jQuery realizes the effect of dragging and dropping the login box with the mouse

2021-08-21 19:29:43
OfStack

This article example for everyone to share the jQuery mouse drag-and-drop login box movement of the specific code, for your reference, the specific content is as follows

1. jQuery code


<script src="js/jquery-3.5.1.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
 $(function () {
 //  Click Login to jump 
 $("a").click(function () {
  $("#bg,#login").css("display","block");
 })
 //  Defining variables 
 var $mX;
 var $mY;
 var $move = false; // true Yes, you can move the login box 
 //  Mouse press event 
 $("#login").mousedown(function (event) {
  $(this).css("opacity",0.5); //  Change transparency 
  $move = true;
  //  Get the distance between the mouse and the origin of the login box 
  $mX = event.pageX-parseInt($(this).css("left"));
  $mY = event.pageY-parseInt($(this).css("top"));
 })
 //  Mouse movement event 
 $("#login").mousemove(function (event) {
  if($move){
  //  Get the amount of login box to move 
  $(this).css("left",(event.pageX-$mX)+"px")
  $(this).css("top",(event.pageY-$mY)+"px")
  }
 }).mouseup(function () {
  //  Mouse pop-up event 
  $move = false;
  $(this).css("opacity",1);
 })
 })
</script>

2.css


<style type="text/css">
 *{
 margin: 0;
 padding: 0;
 }
 h3{
 display: block;
 width: 300px;
 height: 50px;
 text-align: center;
 line-height: 50px;
 background-color: #0076A9;
 }
 #login{
 width: 300px;
 height: 200px;
 margin: 0 auto;
 position: absolute;
 top: 250px;
 left: 500px;
 border: 1px solid #000000;
 background-color: #FFFFFF;
 cursor: move;
 display: none;
 }
 table{
 position: absolute;
 top: 50px;
 left: 0;
 width: 100%;
 height: 150px;
 text-align:center;
 }
 tr,td{
 border: none;
 }
 tr{
 height: 50px;
 }
 td{
 padding: 0 5px 0 5px;
 }
 #bg{
 width: 100%;
 height: 100%;
 background-color:#999999;
 position: absolute;
 top: 0;
 left: 0;
 display: none;
 }
 body{
 width: 100%;
 height: 600px;
 }
</style>

3.HTML


<!DOCTYPE html>
<html>
 <head>
 <meta charset="utf-8">
 <title> Login interface </title>
 
 </head>
 <body>
 <a href="javascript:;" > Login </a>
 <div id="bg"></div>
 <form action="javascript:;" id="login" method="">
 <h3> Welcome to log in! </h3>
 <table border="1" cellspacing="0" cellpadding="0">
 <tr>
  <td align="right"> User name: </td>
  <td align="left"><input type="text" name="userName"/></td>
 </tr>
 <tr>
  <td align="right"> Password: </td>
  <td align="left"><input type="password" name="pwd"/></td>
 </tr>
 <tr>
  <td align="center" colspan="2">
  <input type="button" value=" Submit "/>
  &nbsp&nbsp&nbsp&nbsp&nbsp
  <input type="button" value=" Reset "/>
  </td>
 </tr>
 </table>
 </form>
 
 </body>
</html>