JSFiddle - React, Tailwind, and code Playground

by Graham Fairweather

HTML

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

JavaScript

window.addEventListener("load", function onLoad() {
    this.removeEventListener("load", onLoad);
    
    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);
}, false);