js method to implement progress bar_javascript skills-JS Tutorial-php.cn

js method to implement progress bar_javascript skills

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Release： 2016-05-16 16:14:17

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The example in this article describes how to implement the progress bar in js. Share it with everyone for your reference. The specific implementation method is as follows:

1.setTimeout and clearTimeout

<html> 
<head> 
<title>进度条</title> 
<style type="text/css">  
.container{  
   width:450px;  
   border:1px solid #6C9C2C;  
   height:25px;  
 } 
#bar{  
   background:#95CA0D;  
   float:left; 
   height:100%;  
   text-align:center;  
   line-height:150%; 
 }  
</style>  
<script type="text/javascript">  
  function run(){  
        var bar = document.getElementById("bar"); 
        var total = document.getElementById("total"); 
    bar.style.width=parseInt(bar.style.width) + 1 + "%";  
    total.innerHTML = bar.style.width; 
    if(bar.style.width == "100%"){  
      window.clearTimeout(timeout); 
      return; 
    } 
    var timeout=window.setTimeout("run()",100); 
  } 
    window.onload = function(){  
       run(); 
    }  
</script> 
 
</head> 
<body> 
  <div class="container"> 
   <div id="bar" style="width:0%;"></div>  
  </div>  
  <span id="total"></span> 
</body> 
</html>

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2.setInterval and clearInterval

<html>  
<head>  
<title>进度条</title>  
<style type="text/css">  
.processcontainer{  
   width:450px;  
   border:1px solid #6C9C2C;  
   height:25px;  
 }  
#processbar{  
   background:#95CA0D;  
   float:left; 
   height:100%;  
   text-align:center;  
   line-height:150%; 
 }  
</style>  
<script type="text/javascript">  
 function setProcess(){  
  var processbar = document.getElementById("processbar");  
  processbar.style.width = parseInt(processbar.style.width) + 1 + "%";
  processbar.innerHTML = processbar.style.width;  
  if(processbar.style.width == "100%"){  
     window.clearInterval(bartimer);  
  }  
 }  
var bartimer = window.setInterval(function(){setProcess();},100);  
window.onload = function(){  
   bartimer;  
}  
</script>  
</head>  
<body>  
  <div class="processcontainer">  
   <div id="processbar" style="width:0%;"></div>  
  </div>  
</body>  
</html>

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3.The difference between setTimeout and setInterval

setTimeout() only executes code once. If you want to call it multiple times, use setInterval(). The setInterval() method will keep calling the function until clearInterval() is called or the window is closed, or the code itself calls setTimeout() again.

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