https://englewooddatahub.org/src/js/models/browserModel.js

1"use strict";
2
3var App = App || {};
4
5let BrowserModel = function() {
6    let self = {};
7
8    // based off of https://stackoverflow.com/questions/2324944/in-javascript-how-do-i-determine-if-my-current-browser-is-firefox-on-a-computer
9    function getBrowser() {
10        let agent = navigator.userAgent;
11        let browsers = [
12            { name: "Edge", identifier: "Edge" },
13            { name: "Opera", identifier: "OPR" },
14            { name: "Opera", identifier: "Opera" },
15            { name: "Internet Explorer", identifier: "Trident" },
16            { name: "Internet Explorer", identifier: "MSIE" },
17            { name: "Chrome", identifier: "Chrome" },
18            { name: "Firefox", identifier: "Firefox" },
19            { name: "UC Browser", identifier: "UCBrowser" },
20            { name: "Safari", identifier: "Safari" }, //most agents have safari in them, so may be incorrect
21        ];
22        let browser = browsers.reduce((acc, b) => agent.indexOf(b.identifier) > -1 ? (acc || b.name) : acc, undefined);
23
24        return browser || "Unknown";
25    }
26
27    function isValidBrowser() {
28        return ['Firefox', 'Chrome'].indexOf(getBrowser()) > -1;
29    }
30
31    return {
32        getBrowser,
33        isValidBrowser
34    };
35}