JSFiddle - React, Tailwind, and code Playground

by ashleycam3ron

HTML

<input id="firstName" />
<input id="lastName" />
<input id="fullName">

JavaScript

$('#firstName,#lastName').on("keyup",function(){     
    fName = $("#firstName").val();  
    lName = $("#lastName").val(); 
    fullName = fName + " " + lName;
});