JSFiddle - React, Tailwind, and code Playground

by Tomáš Hromník

HTML

<h1>My First JavaScript</h1>

<p>JavaScript can change the content of an HTML element:</p>

<button type="button" onclick="myFunction()">Toggle text!</button>

<p id="demo">This is a demonstration.</p>

<script>
var i = 0;
demoText = document.getElementById("demo").innerHTML;

function myFunction() { 
    if (i % 2 === 0)
        document.getElementById("demo").innerHTML = "Hello JavaScript!";
    else 
        document.getElementById("demo").innerHTML = demoText;
    
    i++;
}    
</script>