JSFiddle - React, Tailwind, and code Playground

HTML

<p id="demo">Xyz..</p>
<h1>Some more things</h1>
<button type="button" onclick="funct1()">Hello</button>

JavaScript

function funct1()
{
    document.getElementById("demo").innerHTML = "Something";  
    
    // Create a new <p> element, set its HTML and then append it:
    var newP = document.createElement('p');
    newP.innerHTML = 'Mexico!';
    
    document.body.appendChild(newP);
    
}