JSFiddle - React, Tailwind, and code Playground

HTML

<div id="sub-menu">
  Your content here
  Your content here
  Your content here
  Your content here
  Your content here
  Your content here
  Your content here
  Your content here
  Your content here
  Your content here
  Your content here
  Your content here
</div>

CSS

#sub-menu{
  width:250px;
  height: 100px;
  background-color:red;
  overflow: hidden;
}