JSFiddle - React, Tailwind, and code Playground

by Johnny Estilles

HTML

<input type="text" value="15" id="varA"></input>
<input type="text" value="30" id="varB"></input>
<input type="button" value="Add" onclick="addNumbers('varA', 'varB')"></input>
<h1 id="testResult"></h1>

JavaScript

function addNumbers(elem1, elem2) {
  var a = document.getElementById(elem1).value;
  var b = document.getElementById(elem2).value;
  var c = Number(a) + Number(b);
  console.log(c);
  document.getElementById("testResult").innerHTML = c;
}