JSFiddle - React, Tailwind, and code Playground
HTML
<h2>Counting with a local variable.</h2>
<button type="button" onclick="myFunction()">Count!</button>
<p id="demo">0</p>CSS
var add = (function () {
var counter = 0;
return function () {return counter += 1;}
})();
function myFunction(){
document.getElementById("demo").innerHTML = add();
}