JSFiddle - React, Tailwind, and code Playground

HTML

<div class="anchor" id="OperationAnchor"></div>
<input id="Save" type="submit" value="Save">

CSS

div#OperationAnchor{
    border-radius: 1em;
    position: fixed;
    top: -95em;
    height: 100em;
    width: 100%;
    margin: 0 0 -0.2em 0;
    background: #EEE url("../img/bg.png");
}
#Save{
 margin-top: 10em;   
}

JavaScript

$('body').on('click', '#Save', function(){
    
    $('#OperationAnchor').animate({
      top: '+=1.8em'}, 500, function(){
        $('#OperationAnchor').addClass('displaying');
      });
  });