JSFiddle - React, Tailwind, and code Playground

HTML

<p>Click the button to trigger a function.</p>

<button onclick="myFunction('demo1')">Click me</button>

<div id="demo1">demo1</div>
<div id="demo2">demo2</div>

JavaScript

function myFunction(div_id) {
    document.getElementById(div_id).innerHTML = "hello";
}