Js script to identify chrome browser and show an alert

chrome_identifier_script.js

(function () {
    var chrome = {
      string: navigator.userAgent.match(/Chrome\/(\d+)/)
    };

    chrome.version = chrome.string ? parseInt(chrome.string[1], 10) : null;

    currentUrl = window.location.href;
    Domain = "https://domain";
    yDomainWithoutSSL = "http://domain";

    if ((!chrome.string) && (currentUrl === Domain || currentUrl === DomainWithoutSSL))  {
      alert("For best results, Website requires using the Chrome browser. Please close and open using Chrome.");
    }
})();