UNPKG

detectincognitojs

Version:

detectIncognito.js can be used to detect incognito mode & other private browsing modes on most modern browsers as of 2024.

275 lines (274 loc) 14 kB
"use strict"; var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) { function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); } return new (P || (P = Promise))(function (resolve, reject) { function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } } function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } } function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); } step((generator = generator.apply(thisArg, _arguments || [])).next()); }); }; var __generator = (this && this.__generator) || function (thisArg, body) { var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g; return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g; function verb(n) { return function (v) { return step([n, v]); }; } function step(op) { if (f) throw new TypeError("Generator is already executing."); while (g && (g = 0, op[0] && (_ = 0)), _) try { if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t; if (y = 0, t) op = [op[0] & 2, t.value]; switch (op[0]) { case 0: case 1: t = op; break; case 4: _.label++; return { value: op[1], done: false }; case 5: _.label++; y = op[1]; op = [0]; continue; case 7: op = _.ops.pop(); _.trys.pop(); continue; default: if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; } if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; } if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; } if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; } if (t[2]) _.ops.pop(); _.trys.pop(); continue; } op = body.call(thisArg, _); } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; } if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true }; } }; exports.__esModule = true; exports.detectIncognito = void 0; function detectIncognito() { return __awaiter(this, void 0, void 0, function () { return __generator(this, function (_a) { switch (_a.label) { case 0: return [4 /*yield*/, new Promise(function (resolve, reject) { var browserName = 'Unknown'; function __callback(isPrivate) { resolve({ isPrivate: isPrivate, browserName: browserName }); } function identifyChromium() { var ua = navigator.userAgent; if (ua.match(/Chrome/)) { if (navigator.brave !== undefined) { return 'Brave'; } else if (ua.match(/Edg/)) { return 'Edge'; } else if (ua.match(/OPR/)) { return 'Opera'; } return 'Chrome'; } else { return 'Chromium'; } } function assertEvalToString(value) { return value === eval.toString().length; } function feid() { var toFixedEngineID = 0; var neg = parseInt("-1"); try { neg.toFixed(neg); } catch (e) { toFixedEngineID = e.message.length; } return toFixedEngineID; } function isSafari() { return feid() === 44; } function isChrome() { return feid() === 51; } function isFirefox() { return feid() === 25; } function isMSIE() { return (navigator.msSaveBlob !== undefined && assertEvalToString(39)); } /** * Safari (Safari for iOS & macOS) **/ function newSafariTestByStorageFallback() { var _a; if (!((_a = navigator.storage) === null || _a === void 0 ? void 0 : _a.estimate)) { __callback(false); return; } navigator.storage .estimate() .then(function (_a) { var usage = _a.usage, quota = _a.quota; // iOS 18.x/macOS Safari 18.x (normal): ~41GB // iOS 18.x/macOS Safari 18.x (private): ~1GB // If reported quota < 2 GB => likely private if (quota && quota < 2000000000) { __callback(true); } else { __callback(false); } })["catch"](function () { __callback(false); }); } function newSafariTest() { var tmp_name = String(Math.random()); try { var db = window.indexedDB.open(tmp_name, 1); db.onupgradeneeded = function (i) { var _a, _b; var res = (_a = i.target) === null || _a === void 0 ? void 0 : _a.result; try { res.createObjectStore('test', { autoIncrement: true }).put(new Blob()); } catch (e) { var message = e; if (e instanceof Error) { message = (_b = e.message) !== null && _b !== void 0 ? _b : e; } if (typeof message !== 'string') { __callback(false); return; } var matchesExpectedError = message.includes('BlobURLs are not yet supported'); if (matchesExpectedError) { __callback(true); } } finally { res.close(); window.indexedDB.deleteDatabase(tmp_name); // indexdb works on newer versions of safari so we need to check via storage fallback newSafariTestByStorageFallback(); } }; } catch (e) { __callback(false); } } function oldSafariTest() { var openDB = window.openDatabase; var storage = window.localStorage; try { openDB(null, null, null, null); } catch (e) { __callback(true); return; } try { storage.setItem('test', '1'); storage.removeItem('test'); } catch (e) { __callback(true); return; } __callback(false); } function safariPrivateTest() { if (navigator.maxTouchPoints !== undefined) { newSafariTest(); } else { oldSafariTest(); } } /** * Chrome **/ function getQuotaLimit() { var w = window; if (w.performance !== undefined && w.performance.memory !== undefined && w.performance.memory.jsHeapSizeLimit !== undefined) { return performance.memory.jsHeapSizeLimit; } return 1073741824; } // >= 76 function storageQuotaChromePrivateTest() { navigator.webkitTemporaryStorage.queryUsageAndQuota(function (_, quota) { var quotaInMib = Math.round(quota / (1024 * 1024)); var quotaLimitInMib = Math.round(getQuotaLimit() / (1024 * 1024)) * 2; __callback(quotaInMib < quotaLimitInMib); }, function (e) { reject(new Error('detectIncognito somehow failed to query storage quota: ' + e.message)); }); } // 50 to 75 function oldChromePrivateTest() { var fs = window.webkitRequestFileSystem; var success = function () { __callback(false); }; var error = function () { __callback(true); }; fs(0, 1, success, error); } function chromePrivateTest() { if (self.Promise !== undefined && self.Promise.allSettled !== undefined) { storageQuotaChromePrivateTest(); } else { oldChromePrivateTest(); } } /** * Firefox **/ function firefoxPrivateTest() { __callback(navigator.serviceWorker === undefined); } /** * MSIE **/ function msiePrivateTest() { __callback(window.indexedDB === undefined); } function main() { if (isSafari()) { browserName = 'Safari'; safariPrivateTest(); } else if (isChrome()) { browserName = identifyChromium(); chromePrivateTest(); } else if (isFirefox()) { browserName = 'Firefox'; firefoxPrivateTest(); } else if (isMSIE()) { browserName = 'Internet Explorer'; msiePrivateTest(); } else { reject(new Error('detectIncognito cannot determine the browser')); } } main(); })]; case 1: return [2 /*return*/, _a.sent()]; } }); }); } exports.detectIncognito = detectIncognito; if (typeof window !== 'undefined') { window.detectIncognito = detectIncognito; } exports["default"] = detectIncognito;