console 命令行工具 X clear

console

$(function(){
  $('.process').animate({width: 100}, 2000)
});

<div class="process-box">
  <div class="process">
  </div>
</div>

.process-box{
  width: 100px;
  border: 2px solid #f1f1f1;
  height: 5px;
  .process {
    background: red;
    height: 100%;
    width: 0px;
  }
}