JSFiddle - React, Tailwind, and code Playground

HTML

<div style="display:none; width:200px">
    <div id="test" style="width:100%"></div>
</div>

JavaScript

document.write("Outer Width: " + $("#test").outerWidth() +"<br/>"+
"Inner Width: " + $("#test").innerWidth() +"<br/>"+
"Width: " + $("#test").width());