JSFiddle - React, Tailwind, and code Playground

HTML

<div>
Test
</div>
<button onclick="Zoom()">+</button>
<button onclick="unZoom()">-</button>

CSS

body{
  transform-origin: top left;
}

JavaScript

var i=1;
function Zoom()
{
	i+=0.2;
	document.body.style.transform="scale("+i+")";
}
function unZoom()
{
	i-=0.2;
	document.body.style.transform="scale("+i+")";
}