JSFiddle - React, Tailwind, and code Playground
HTML
<input id="txtval1" />
<input id="txtval2" />
<input id="result" />
<button id="btnAdd">ADDITION</button>
JavaScript
$(document).ready(function () {
var v1, v2, res;
$("#btnAdd").click(function () {
v1 = $("#txtval1").val();
v2 = $("#txtval2").val();
res = parseFloat(v1) + parseFloat(v2);
$("#result").val(res);
});
});