JSFiddle - React, Tailwind, and code Playground

by Graham Fairweather

HTML

<input type="text" name="fname" id="fname">

JavaScript

function getCookie(something) {
    var cookies = {
        "username": "John Smith"
    }
    
    return cookies[something];
}

function checkCookie() {
    var cookieName = getCookie("username");

    if (cookieName != null && cookieName != "") {
        alert(cookieName);
        this.value = cookieName;
    } else {
        alert("else");
    }
}

var fname = document.getElementById("fname");

fname.addEventListener("keyup", checkCookie, false);