<div class="wrap">
  <a href="#" class="open">這是一個按鈕</a>
<div class="box box-dark"></div>
<div class="box box-danger"></div>
<div class="box box-warning"></div>  
</div>
.wrap{
  margin-top:10px;
  margin-left:10px;
}
.open{
  text-decoration: none;
  border:1px solid black;
}
.box{
  width: 100px;
  height: 100px;
  display: none;
}
.box-dark{
  background-color: black;
}
.box-danger{
  background-color: red;
}
.box-warning{
  background-color: yellow;
}
$(document).ready(function(){
 $('.open').click(function(e){
   e.preventDefault();
   $('.box-dark').delay(0).slideDown();
   $('.box-danger').delay(1000).slideDown();
   $('.box-warning').delay(2000).show(0);
   
 })
  
})

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js