JSFiddle - React, Tailwind, and code Playground

by Trisox

HTML

<div class="background">
    <div class="animation"></div>
</div>

CSS

body{margin:20px;}
.background{
    background: url("http://i.istockimg.com/file_thumbview_approve/16045466/2/stock-illustration-16045466-green-tree-illustration.jpg") no-repeat;
    height:380px;
    width:347px;
    display:block;
    position:absolute;
}

.animation{
    position:absolute;
    height:380px;
    width:347px;
    background:#fff;  
    top:0;
}

JavaScript

$('.animation').animate({
    height: '0px'
  }, 2000);