JSFiddle - React, Tailwind, and code Playground

by Eduard Dyckman

HTML

<div class="item"></div><div class="expandable collapsed"></div><div class="item"></div>
<section>
<button onClick="expand();">
GO
</button>
</section>

CSS

div {
  display: inline-block;
  margin: 1px;
  width: 50px;
  height: 20px;
  border: 1px solid red;
  
}

.item {
  background-color: green;
}

.collapsed {
  width: 0;
  margin: 0;
  border: 0;
  padding: 0;
}
.expandable {
  transition: width 0.3s ease-in-out;
}

JavaScript

window.expand = function expand() {
	document.querySelector('.expandable').style.width = '50px';
}