js实现进度条的方法

2019-11-20 13:09:44

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本文实例讲述了js实现进度条的方法。分享给大家供大家参考。具体实现方法如下：

1.setTimeout和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>

效果图：

2.setInterval和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>

效果图：