JSFiddle - React, Tailwind, and code Playground

by techiedelight

HTML

<div id="container" class="main"></div>

CSS

.main {
  border: 1px solid lightblue;
  width: 400px;
  height: 100px;
  padding: 5px;
}

JavaScript

var offsetWidth = document.getElementById('container').offsetWidth;
alert(offsetWidth);