JSFiddle - React, Tailwind, and code Playground

by Sascha

HTML

<div id="main">
    <div id="main-column">Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.<br />
        Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</div>
    <div id="side-bar">
      <div id="side-bar-header">
          <h1>Sidebar Header</h1>
          A short introductiory text
      </div>
      <div id="side-bar-scroller">
          <ul>
              <li>Option 1</li>
              <li>Option 2</li>
              <li>Option 3</li>        
              <li>Option 1</li>
              <li>Option 2</li>
              <li>Option 3</li>                
              <li>Option 1</li>
              <li>Option 2</li>
              <li>Option 3</li>  
              <li>Option 1</li>
              <li>Option 2</li>
              <li>Option 3</li>  
              asdas
              asda
              sdasdasdas
              dasdasd
              
          </ul>
      </div>

    </div>
</div>

CSS

body {
  font-family: Verdana;  
  font-size: 12px;    
  padding: 10px;
}
#main {
   border: 1px dotted gray;   
   background-color: ivory;
}
h1 {
  font-size: 14px;
  font-weight: bold;
  padding: 5px;   
}
#main-column {
  width: 70%;
  display: inline-block;   
  background-color: #eee;  
}
#side-bar {
  float: right;
  background-color: blue;    
  color: white;
  width: 20%;
}

#side-bar-scroller {
  overflow: auto; 
  margin-left: 5px;
}

JavaScript

$(document).ready(function() {
    var mainHeight = $('#main-column').height();
    var sidebarHeaderHeight = $('#side-bar-header').height();
    $('#side-bar-scroller').css('height', mainHeight - sidebarHeaderHeight);
});