查看“MediaWiki:Gadget-localforage.js”的源代码

"use strict";
(function () {
    var _$localforage_1 = { exports: {} };
    (function (global) {
        (function () {
            (function (f) { if (typeof _$localforage_1.exports === "object" && "object" !== "undefined") {
                _$localforage_1.exports = f();
            }
            else if (typeof define === "function" && define.amd) {
                define([], f);
            }
            else {
                var g;
                if (typeof window !== "undefined") {
                    g = window;
                }
                else if (typeof global !== "undefined") {
                    g = global;
                }
                else if (typeof self !== "undefined") {
                    g = self;
                }
                else {
                    g = this;
                }
                g.localforage = f();
            } })(function () {
                var define, module, exports;
                return (function e(t, n, r) { function s(o, u) { if (!n[o]) {
                    if (!t[o]) {
                        var a = "function" == "function" && require;
                        if (!u && a)
                            return a(o, !0);
                        if (i)
                            return i(o, !0);
                        var f = new Error("Cannot find module '" + o + "'");
                        throw (f.code = "MODULE_NOT_FOUND", f);
                    }
                    var l = n[o] = { exports: {} };
                    t[o][0].call(l.exports, function (e) { var n = t[o][1][e]; return s(n ? n : e); }, l, l.exports, e, t, n, r);
                } return n[o].exports; } var i = "function" == "function" && require; for (var o = 0; o < r.length; o++)
                    s(r[o]); return s; })({ 1: [function (_dereq_, module, exports) {
                            (function (global) {
                                'use strict';
                                var Mutation = global.MutationObserver || global.WebKitMutationObserver;
                                var scheduleDrain;
                                {
                                    if (Mutation) {
                                        var called = 0;
                                        var observer = new Mutation(nextTick);
                                        var element = global.document.createTextNode('');
                                        observer.observe(element, {
                                            characterData: true
                                        });
                                        scheduleDrain = function () {
                                            element.data = (called = ++called % 2);
                                        };
                                    }
                                    else if (!global.setImmediate && typeof global.MessageChannel !== 'undefined') {
                                        var channel = new global.MessageChannel();
                                        channel.port1.onmessage = nextTick;
                                        scheduleDrain = function () {
                                            channel.port2.postMessage(0);
                                        };
                                    }
                                    else if ('document' in global && 'onreadystatechange' in global.document.createElement('script')) {
                                        scheduleDrain = function () {
                                            var scriptEl = global.document.createElement('script');
                                            scriptEl.onreadystatechange = function () {
                                                nextTick();
                                                scriptEl.onreadystatechange = null;
                                                scriptEl.parentNode.removeChild(scriptEl);
                                                scriptEl = null;
                                            };
                                            global.document.documentElement.appendChild(scriptEl);
                                        };
                                    }
                                    else {
                                        scheduleDrain = function () {
                                            setTimeout(nextTick, 0);
                                        };
                                    }
                                }
                                var draining;
                                var queue = [];
                                function nextTick() {
                                    draining = true;
                                    var i, oldQueue;
                                    var len = queue.length;
                                    while (len) {
                                        oldQueue = queue;
                                        queue = [];
                                        i = -1;
                                        while (++i < len) {
                                            oldQueue[i]();
                                        }
                                        len = queue.length;
                                    }
                                    draining = false;
                                }
                                module.exports = immediate;
                                function immediate(task) {
                                    if (queue.push(task) === 1 && !draining) {
                                        scheduleDrain();
                                    }
                                }
                            }).call(this, typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
                        }, {}], 2: [function (_dereq_, module, exports) {
                            'use strict';
                            var immediate = _dereq_(1);
                            function INTERNAL() { }
                            var handlers = {};
                            var REJECTED = ['REJECTED'];
                            var FULFILLED = ['FULFILLED'];
                            var PENDING = ['PENDING'];
                            module.exports = Promise;
                            function Promise(resolver) {
                                if (typeof resolver !== 'function') {
                                    throw new TypeError('resolver must be a function');
                                }
                                this.state = PENDING;
                                this.queue = [];
                                this.outcome = void 0;
                                if (resolver !== INTERNAL) {
                                    safelyResolveThenable(this, resolver);
                                }
                            }
                            Promise.prototype["catch"] = function (onRejected) {
                                return this.then(null, onRejected);
                            };
                            Promise.prototype.then = function (onFulfilled, onRejected) {
                                if (typeof onFulfilled !== 'function' && this.state === FULFILLED ||
                                    typeof onRejected !== 'function' && this.state === REJECTED) {
                                    return this;
                                }
                                var promise = new this.constructor(INTERNAL);
                                if (this.state !== PENDING) {
                                    var resolver = this.state === FULFILLED ? onFulfilled : onRejected;
                                    unwrap(promise, resolver, this.outcome);
                                }
                                else {
                                    this.queue.push(new QueueItem(promise, onFulfilled, onRejected));
                                }
                                return promise;
                            };
                            function QueueItem(promise, onFulfilled, onRejected) {
                                this.promise = promise;
                                if (typeof onFulfilled === 'function') {
                                    this.onFulfilled = onFulfilled;
                                    this.callFulfilled = this.otherCallFulfilled;
                                }
                                if (typeof onRejected === 'function') {
                                    this.onRejected = onRejected;
                                    this.callRejected = this.otherCallRejected;
                                }
                            }
                            QueueItem.prototype.callFulfilled = function (value) {
                                handlers.resolve(this.promise, value);
                            };
                            QueueItem.prototype.otherCallFulfilled = function (value) {
                                unwrap(this.promise, this.onFulfilled, value);
                            };
                            QueueItem.prototype.callRejected = function (value) {
                                handlers.reject(this.promise, value);
                            };
                            QueueItem.prototype.otherCallRejected = function (value) {
                                unwrap(this.promise, this.onRejected, value);
                            };
                            function unwrap(promise, func, value) {
                                immediate(function () {
                                    var returnValue;
                                    try {
                                        returnValue = func(value);
                                    }
                                    catch (e) {
                                        return handlers.reject(promise, e);
                                    }
                                    if (returnValue === promise) {
                                        handlers.reject(promise, new TypeError('Cannot resolve promise with itself'));
                                    }
                                    else {
                                        handlers.resolve(promise, returnValue);
                                    }
                                });
                            }
                            handlers.resolve = function (self, value) {
                                var result = tryCatch(getThen, value);
                                if (result.status === 'error') {
                                    return handlers.reject(self, result.value);
                                }
                                var thenable = result.value;
                                if (thenable) {
                                    safelyResolveThenable(self, thenable);
                                }
                                else {
                                    self.state = FULFILLED;
                                    self.outcome = value;
                                    var i = -1;
                                    var len = self.queue.length;
                                    while (++i < len) {
                                        self.queue[i].callFulfilled(value);
                                    }
                                }
                                return self;
                            };
                            handlers.reject = function (self, error) {
                                self.state = REJECTED;
                                self.outcome = error;
                                var i = -1;
                                var len = self.queue.length;
                                while (++i < len) {
                                    self.queue[i].callRejected(error);
                                }
                                return self;
                            };
                            function getThen(obj) {
                                var then = obj && obj.then;
                                if (obj && (typeof obj === 'object' || typeof obj === 'function') && typeof then === 'function') {
                                    return function appyThen() {
                                        then.apply(obj, arguments);
                                    };
                                }
                            }
                            function safelyResolveThenable(self, thenable) {
                                var called = false;
                                function onError(value) {
                                    if (called) {
                                        return;
                                    }
                                    called = true;
                                    handlers.reject(self, value);
                                }
                                function onSuccess(value) {
                                    if (called) {
                                        return;
                                    }
                                    called = true;
                                    handlers.resolve(self, value);
                                }
                                function tryToUnwrap() {
                                    thenable(onSuccess, onError);
                                }
                                var result = tryCatch(tryToUnwrap);
                                if (result.status === 'error') {
                                    onError(result.value);
                                }
                            }
                            function tryCatch(func, value) {
                                var out = {};
                                try {
                                    out.value = func(value);
                                    out.status = 'success';
                                }
                                catch (e) {
                                    out.status = 'error';
                                    out.value = e;
                                }
                                return out;
                            }
                            Promise.resolve = resolve;
                            function resolve(value) {
                                if (value instanceof this) {
                                    return value;
                                }
                                return handlers.resolve(new this(INTERNAL), value);
                            }
                            Promise.reject = reject;
                            function reject(reason) {
                                var promise = new this(INTERNAL);
                                return handlers.reject(promise, reason);
                            }
                            Promise.all = all;
                            function all(iterable) {
                                var self = this;
                                if (Object.prototype.toString.call(iterable) !== '[object Array]') {
                                    return this.reject(new TypeError('must be an array'));
                                }
                                var len = iterable.length;
                                var called = false;
                                if (!len) {
                                    return this.resolve([]);
                                }
                                var values = new Array(len);
                                var resolved = 0;
                                var i = -1;
                                var promise = new this(INTERNAL);
                                while (++i < len) {
                                    allResolver(iterable[i], i);
                                }
                                return promise;
                                function allResolver(value, i) {
                                    self.resolve(value).then(resolveFromAll, function (error) {
                                        if (!called) {
                                            called = true;
                                            handlers.reject(promise, error);
                                        }
                                    });
                                    function resolveFromAll(outValue) {
                                        values[i] = outValue;
                                        if (++resolved === len && !called) {
                                            called = true;
                                            handlers.resolve(promise, values);
                                        }
                                    }
                                }
                            }
                            Promise.race = race;
                            function race(iterable) {
                                var self = this;
                                if (Object.prototype.toString.call(iterable) !== '[object Array]') {
                                    return this.reject(new TypeError('must be an array'));
                                }
                                var len = iterable.length;
                                var called = false;
                                if (!len) {
                                    return this.resolve([]);
                                }
                                var i = -1;
                                var promise = new this(INTERNAL);
                                while (++i < len) {
                                    resolver(iterable[i]);
                                }
                                return promise;
                                function resolver(value) {
                                    self.resolve(value).then(function (response) {
                                        if (!called) {
                                            called = true;
                                            handlers.resolve(promise, response);
                                        }
                                    }, function (error) {
                                        if (!called) {
                                            called = true;
                                            handlers.reject(promise, error);
                                        }
                                    });
                                }
                            }
                        }, { "1": 1 }], 3: [function (_dereq_, module, exports) {
                            (function (global) {
                                'use strict';
                                if (typeof global.Promise !== 'function') {
                                    global.Promise = _dereq_(2);
                                }
                            }).call(this, typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
                        }, { "2": 2 }], 4: [function (_dereq_, module, exports) {
                            'use strict';
                            var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
                            function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) {
                                throw new TypeError("Cannot call a class as a function");
                            } }
                            function getIDB() {
                                try {
                                    if (typeof indexedDB !== 'undefined') {
                                        return indexedDB;
                                    }
                                    if (typeof webkitIndexedDB !== 'undefined') {
                                        return webkitIndexedDB;
                                    }
                                    if (typeof mozIndexedDB !== 'undefined') {
                                        return mozIndexedDB;
                                    }
                                    if (typeof OIndexedDB !== 'undefined') {
                                        return OIndexedDB;
                                    }
                                    if (typeof msIndexedDB !== 'undefined') {
                                        return msIndexedDB;
                                    }
                                }
                                catch (e) {
                                    return;
                                }
                            }
                            var idb = getIDB();
                            function isIndexedDBValid() {
                                try {
                                    if (!idb || !idb.open) {
                                        return false;
                                    }
                                    var isSafari = typeof openDatabase !== 'undefined' && /(Safari|iPhone|iPad|iPod)/.test(navigator.userAgent) && !/Chrome/.test(navigator.userAgent) && !/BlackBerry/.test(navigator.platform);
                                    var hasFetch = typeof fetch === 'function' && fetch.toString().indexOf('[native code') !== -1;
                                    return (!isSafari || hasFetch) && typeof indexedDB !== 'undefined' &&
                                        typeof IDBKeyRange !== 'undefined';
                                }
                                catch (e) {
                                    return false;
                                }
                            }
                            function createBlob(parts, properties) {
                                parts = parts || [];
                                properties = properties || {};
                                try {
                                    return new Blob(parts, properties);
                                }
                                catch (e) {
                                    if (e.name !== 'TypeError') {
                                        throw e;
                                    }
                                    var Builder = typeof BlobBuilder !== 'undefined' ? BlobBuilder : typeof MSBlobBuilder !== 'undefined' ? MSBlobBuilder : typeof MozBlobBuilder !== 'undefined' ? MozBlobBuilder : WebKitBlobBuilder;
                                    var builder = new Builder();
                                    for (var i = 0; i < parts.length; i += 1) {
                                        builder.append(parts[i]);
                                    }
                                    return builder.getBlob(properties.type);
                                }
                            }
                            if (typeof Promise === 'undefined') {
                                _dereq_(3);
                            }
                            var Promise$1 = Promise;
                            function executeCallback(promise, callback) {
                                if (callback) {
                                    promise.then(function (result) {
                                        callback(null, result);
                                    }, function (error) {
                                        callback(error);
                                    });
                                }
                            }
                            function executeTwoCallbacks(promise, callback, errorCallback) {
                                if (typeof callback === 'function') {
                                    promise.then(callback);
                                }
                                if (typeof errorCallback === 'function') {
                                    promise["catch"](errorCallback);
                                }
                            }
                            function normalizeKey(key) {
                                if (typeof key !== 'string') {
                                    console.warn(key + ' used as a key, but it is not a string.');
                                    key = String(key);
                                }
                                return key;
                            }
                            function getCallback() {
                                if (arguments.length && typeof arguments[arguments.length - 1] === 'function') {
                                    return arguments[arguments.length - 1];
                                }
                            }
                            var DETECT_BLOB_SUPPORT_STORE = 'local-forage-detect-blob-support';
                            var supportsBlobs = void 0;
                            var dbContexts = {};
                            var toString = Object.prototype.toString;
                            var READ_ONLY = 'readonly';
                            var READ_WRITE = 'readwrite';
                            function _binStringToArrayBuffer(bin) {
                                var length = bin.length;
                                var buf = new ArrayBuffer(length);
                                var arr = new Uint8Array(buf);
                                for (var i = 0; i < length; i++) {
                                    arr[i] = bin.charCodeAt(i);
                                }
                                return buf;
                            }
                            function _checkBlobSupportWithoutCaching(idb) {
                                return new Promise$1(function (resolve) {
                                    var txn = idb.transaction(DETECT_BLOB_SUPPORT_STORE, READ_WRITE);
                                    var blob = createBlob(['']);
                                    txn.objectStore(DETECT_BLOB_SUPPORT_STORE).put(blob, 'key');
                                    txn.onabort = function (e) {
                                        e.preventDefault();
                                        e.stopPropagation();
                                        resolve(false);
                                    };
                                    txn.oncomplete = function () {
                                        var matchedChrome = navigator.userAgent.match(/Chrome\/(\d+)/);
                                        var matchedEdge = navigator.userAgent.match(/Edge\//);
                                        resolve(matchedEdge || !matchedChrome || parseInt(matchedChrome[1], 10) >= 43);
                                    };
                                })["catch"](function () {
                                    return false;
                                });
                            }
                            function _checkBlobSupport(idb) {
                                if (typeof supportsBlobs === 'boolean') {
                                    return Promise$1.resolve(supportsBlobs);
                                }
                                return _checkBlobSupportWithoutCaching(idb).then(function (value) {
                                    supportsBlobs = value;
                                    return supportsBlobs;
                                });
                            }
                            function _deferReadiness(dbInfo) {
                                var dbContext = dbContexts[dbInfo.name];
                                var deferredOperation = {};
                                deferredOperation.promise = new Promise$1(function (resolve, reject) {
                                    deferredOperation.resolve = resolve;
                                    deferredOperation.reject = reject;
                                });
                                dbContext.deferredOperations.push(deferredOperation);
                                if (!dbContext.dbReady) {
                                    dbContext.dbReady = deferredOperation.promise;
                                }
                                else {
                                    dbContext.dbReady = dbContext.dbReady.then(function () {
                                        return deferredOperation.promise;
                                    });
                                }
                            }
                            function _advanceReadiness(dbInfo) {
                                var dbContext = dbContexts[dbInfo.name];
                                var deferredOperation = dbContext.deferredOperations.pop();
                                if (deferredOperation) {
                                    deferredOperation.resolve();
                                    return deferredOperation.promise;
                                }
                            }
                            function _rejectReadiness(dbInfo, err) {
                                var dbContext = dbContexts[dbInfo.name];
                                var deferredOperation = dbContext.deferredOperations.pop();
                                if (deferredOperation) {
                                    deferredOperation.reject(err);
                                    return deferredOperation.promise;
                                }
                            }
                            function _getConnection(dbInfo, upgradeNeeded) {
                                return new Promise$1(function (resolve, reject) {
                                    dbContexts[dbInfo.name] = dbContexts[dbInfo.name] || createDbContext();
                                    if (dbInfo.db) {
                                        if (upgradeNeeded) {
                                            _deferReadiness(dbInfo);
                                            dbInfo.db.close();
                                        }
                                        else {
                                            return resolve(dbInfo.db);
                                        }
                                    }
                                    var dbArgs = [dbInfo.name];
                                    if (upgradeNeeded) {
                                        dbArgs.push(dbInfo.version);
                                    }
                                    var openreq = idb.open.apply(idb, dbArgs);
                                    if (upgradeNeeded) {
                                        openreq.onupgradeneeded = function (e) {
                                            var db = openreq.result;
                                            try {
                                                db.createObjectStore(dbInfo.storeName);
                                                if (e.oldVersion <= 1) {
                                                    db.createObjectStore(DETECT_BLOB_SUPPORT_STORE);
                                                }
                                            }
                                            catch (ex) {
                                                if (ex.name === 'ConstraintError') {
                                                    console.warn('The database "' + dbInfo.name + '"' + ' has been upgraded from version ' + e.oldVersion + ' to version ' + e.newVersion + ', but the storage "' + dbInfo.storeName + '" already exists.');
                                                }
                                                else {
                                                    throw ex;
                                                }
                                            }
                                        };
                                    }
                                    openreq.onerror = function (e) {
                                        e.preventDefault();
                                        reject(openreq.error);
                                    };
                                    openreq.onsuccess = function () {
                                        var db = openreq.result;
                                        db.onversionchange = function (e) {
                                            e.target.close();
                                        };
                                        resolve(db);
                                        _advanceReadiness(dbInfo);
                                    };
                                });
                            }
                            function _getOriginalConnection(dbInfo) {
                                return _getConnection(dbInfo, false);
                            }
                            function _getUpgradedConnection(dbInfo) {
                                return _getConnection(dbInfo, true);
                            }
                            function _isUpgradeNeeded(dbInfo, defaultVersion) {
                                if (!dbInfo.db) {
                                    return true;
                                }
                                var isNewStore = !dbInfo.db.objectStoreNames.contains(dbInfo.storeName);
                                var isDowngrade = dbInfo.version < dbInfo.db.version;
                                var isUpgrade = dbInfo.version > dbInfo.db.version;
                                if (isDowngrade) {
                                    if (dbInfo.version !== defaultVersion) {
                                        console.warn('The database "' + dbInfo.name + '"' + " can't be downgraded from version " + dbInfo.db.version + ' to version ' + dbInfo.version + '.');
                                    }
                                    dbInfo.version = dbInfo.db.version;
                                }
                                if (isUpgrade || isNewStore) {
                                    if (isNewStore) {
                                        var incVersion = dbInfo.db.version + 1;
                                        if (incVersion > dbInfo.version) {
                                            dbInfo.version = incVersion;
                                        }
                                    }
                                    return true;
                                }
                                return false;
                            }
                            function _encodeBlob(blob) {
                                return new Promise$1(function (resolve, reject) {
                                    var reader = new FileReader();
                                    reader.onerror = reject;
                                    reader.onloadend = function (e) {
                                        var base64 = btoa(e.target.result || '');
                                        resolve({
                                            __local_forage_encoded_blob: true,
                                            data: base64,
                                            type: blob.type
                                        });
                                    };
                                    reader.readAsBinaryString(blob);
                                });
                            }
                            function _decodeBlob(encodedBlob) {
                                var arrayBuff = _binStringToArrayBuffer(atob(encodedBlob.data));
                                return createBlob([arrayBuff], { type: encodedBlob.type });
                            }
                            function _isEncodedBlob(value) {
                                return value && value.__local_forage_encoded_blob;
                            }
                            function _fullyReady(callback) {
                                var self = this;
                                var promise = self._initReady().then(function () {
                                    var dbContext = dbContexts[self._dbInfo.name];
                                    if (dbContext && dbContext.dbReady) {
                                        return dbContext.dbReady;
                                    }
                                });
                                executeTwoCallbacks(promise, callback, callback);
                                return promise;
                            }
                            function _tryReconnect(dbInfo) {
                                _deferReadiness(dbInfo);
                                var dbContext = dbContexts[dbInfo.name];
                                var forages = dbContext.forages;
                                for (var i = 0; i < forages.length; i++) {
                                    var forage = forages[i];
                                    if (forage._dbInfo.db) {
                                        forage._dbInfo.db.close();
                                        forage._dbInfo.db = null;
                                    }
                                }
                                dbInfo.db = null;
                                return _getOriginalConnection(dbInfo).then(function (db) {
                                    dbInfo.db = db;
                                    if (_isUpgradeNeeded(dbInfo)) {
                                        return _getUpgradedConnection(dbInfo);
                                    }
                                    return db;
                                }).then(function (db) {
                                    dbInfo.db = dbContext.db = db;
                                    for (var i = 0; i < forages.length; i++) {
                                        forages[i]._dbInfo.db = db;
                                    }
                                })["catch"](function (err) {
                                    _rejectReadiness(dbInfo, err);
                                    throw err;
                                });
                            }
                            function createTransaction(dbInfo, mode, callback, retries) {
                                if (retries === undefined) {
                                    retries = 1;
                                }
                                try {
                                    var tx = dbInfo.db.transaction(dbInfo.storeName, mode);
                                    callback(null, tx);
                                }
                                catch (err) {
                                    if (retries > 0 && (!dbInfo.db || err.name === 'InvalidStateError' || err.name === 'NotFoundError')) {
                                        return Promise$1.resolve().then(function () {
                                            if (!dbInfo.db || err.name === 'NotFoundError' && !dbInfo.db.objectStoreNames.contains(dbInfo.storeName) && dbInfo.version <= dbInfo.db.version) {
                                                if (dbInfo.db) {
                                                    dbInfo.version = dbInfo.db.version + 1;
                                                }
                                                return _getUpgradedConnection(dbInfo);
                                            }
                                        }).then(function () {
                                            return _tryReconnect(dbInfo).then(function () {
                                                createTransaction(dbInfo, mode, callback, retries - 1);
                                            });
                                        })["catch"](callback);
                                    }
                                    callback(err);
                                }
                            }
                            function createDbContext() {
                                return {
                                    forages: [],
                                    db: null,
                                    dbReady: null,
                                    deferredOperations: []
                                };
                            }
                            function _initStorage(options) {
                                var self = this;
                                var dbInfo = {
                                    db: null
                                };
                                if (options) {
                                    for (var i in options) {
                                        dbInfo[i] = options[i];
                                    }
                                }
                                var dbContext = dbContexts[dbInfo.name];
                                if (!dbContext) {
                                    dbContext = createDbContext();
                                    dbContexts[dbInfo.name] = dbContext;
                                }
                                dbContext.forages.push(self);
                                if (!self._initReady) {
                                    self._initReady = self.ready;
                                    self.ready = _fullyReady;
                                }
                                var initPromises = [];
                                function ignoreErrors() {
                                    return Promise$1.resolve();
                                }
                                for (var j = 0; j < dbContext.forages.length; j++) {
                                    var forage = dbContext.forages[j];
                                    if (forage !== self) {
                                        initPromises.push(forage._initReady()["catch"](ignoreErrors));
                                    }
                                }
                                var forages = dbContext.forages.slice(0);
                                return Promise$1.all(initPromises).then(function () {
                                    dbInfo.db = dbContext.db;
                                    return _getOriginalConnection(dbInfo);
                                }).then(function (db) {
                                    dbInfo.db = db;
                                    if (_isUpgradeNeeded(dbInfo, self._defaultConfig.version)) {
                                        return _getUpgradedConnection(dbInfo);
                                    }
                                    return db;
                                }).then(function (db) {
                                    dbInfo.db = dbContext.db = db;
                                    self._dbInfo = dbInfo;
                                    for (var k = 0; k < forages.length; k++) {
                                        var forage = forages[k];
                                        if (forage !== self) {
                                            forage._dbInfo.db = dbInfo.db;
                                            forage._dbInfo.version = dbInfo.version;
                                        }
                                    }
                                });
                            }
                            function getItem(key, callback) {
                                var self = this;
                                key = normalizeKey(key);
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        createTransaction(self._dbInfo, READ_ONLY, function (err, transaction) {
                                            if (err) {
                                                return reject(err);
                                            }
                                            try {
                                                var store = transaction.objectStore(self._dbInfo.storeName);
                                                var req = store.get(key);
                                                req.onsuccess = function () {
                                                    var value = req.result;
                                                    if (value === undefined) {
                                                        value = null;
                                                    }
                                                    if (_isEncodedBlob(value)) {
                                                        value = _decodeBlob(value);
                                                    }
                                                    resolve(value);
                                                };
                                                req.onerror = function () {
                                                    reject(req.error);
                                                };
                                            }
                                            catch (e) {
                                                reject(e);
                                            }
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function iterate(iterator, callback) {
                                var self = this;
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        createTransaction(self._dbInfo, READ_ONLY, function (err, transaction) {
                                            if (err) {
                                                return reject(err);
                                            }
                                            try {
                                                var store = transaction.objectStore(self._dbInfo.storeName);
                                                var req = store.openCursor();
                                                var iterationNumber = 1;
                                                req.onsuccess = function () {
                                                    var cursor = req.result;
                                                    if (cursor) {
                                                        var value = cursor.value;
                                                        if (_isEncodedBlob(value)) {
                                                            value = _decodeBlob(value);
                                                        }
                                                        var result = iterator(value, cursor.key, iterationNumber++);
                                                        if (result !== void 0) {
                                                            resolve(result);
                                                        }
                                                        else {
                                                            cursor["continue"]();
                                                        }
                                                    }
                                                    else {
                                                        resolve();
                                                    }
                                                };
                                                req.onerror = function () {
                                                    reject(req.error);
                                                };
                                            }
                                            catch (e) {
                                                reject(e);
                                            }
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function setItem(key, value, callback) {
                                var self = this;
                                key = normalizeKey(key);
                                var promise = new Promise$1(function (resolve, reject) {
                                    var dbInfo;
                                    self.ready().then(function () {
                                        dbInfo = self._dbInfo;
                                        if (toString.call(value) === '[object Blob]') {
                                            return _checkBlobSupport(dbInfo.db).then(function (blobSupport) {
                                                if (blobSupport) {
                                                    return value;
                                                }
                                                return _encodeBlob(value);
                                            });
                                        }
                                        return value;
                                    }).then(function (value) {
                                        createTransaction(self._dbInfo, READ_WRITE, function (err, transaction) {
                                            if (err) {
                                                return reject(err);
                                            }
                                            try {
                                                var store = transaction.objectStore(self._dbInfo.storeName);
                                                if (value === null) {
                                                    value = undefined;
                                                }
                                                var req = store.put(value, key);
                                                transaction.oncomplete = function () {
                                                    if (value === undefined) {
                                                        value = null;
                                                    }
                                                    resolve(value);
                                                };
                                                transaction.onabort = transaction.onerror = function () {
                                                    var err = req.error ? req.error : req.transaction.error;
                                                    reject(err);
                                                };
                                            }
                                            catch (e) {
                                                reject(e);
                                            }
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function removeItem(key, callback) {
                                var self = this;
                                key = normalizeKey(key);
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        createTransaction(self._dbInfo, READ_WRITE, function (err, transaction) {
                                            if (err) {
                                                return reject(err);
                                            }
                                            try {
                                                var store = transaction.objectStore(self._dbInfo.storeName);
                                                var req = store["delete"](key);
                                                transaction.oncomplete = function () {
                                                    resolve();
                                                };
                                                transaction.onerror = function () {
                                                    reject(req.error);
                                                };
                                                transaction.onabort = function () {
                                                    var err = req.error ? req.error : req.transaction.error;
                                                    reject(err);
                                                };
                                            }
                                            catch (e) {
                                                reject(e);
                                            }
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function clear(callback) {
                                var self = this;
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        createTransaction(self._dbInfo, READ_WRITE, function (err, transaction) {
                                            if (err) {
                                                return reject(err);
                                            }
                                            try {
                                                var store = transaction.objectStore(self._dbInfo.storeName);
                                                var req = store.clear();
                                                transaction.oncomplete = function () {
                                                    resolve();
                                                };
                                                transaction.onabort = transaction.onerror = function () {
                                                    var err = req.error ? req.error : req.transaction.error;
                                                    reject(err);
                                                };
                                            }
                                            catch (e) {
                                                reject(e);
                                            }
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function length(callback) {
                                var self = this;
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        createTransaction(self._dbInfo, READ_ONLY, function (err, transaction) {
                                            if (err) {
                                                return reject(err);
                                            }
                                            try {
                                                var store = transaction.objectStore(self._dbInfo.storeName);
                                                var req = store.count();
                                                req.onsuccess = function () {
                                                    resolve(req.result);
                                                };
                                                req.onerror = function () {
                                                    reject(req.error);
                                                };
                                            }
                                            catch (e) {
                                                reject(e);
                                            }
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function key(n, callback) {
                                var self = this;
                                var promise = new Promise$1(function (resolve, reject) {
                                    if (n < 0) {
                                        resolve(null);
                                        return;
                                    }
                                    self.ready().then(function () {
                                        createTransaction(self._dbInfo, READ_ONLY, function (err, transaction) {
                                            if (err) {
                                                return reject(err);
                                            }
                                            try {
                                                var store = transaction.objectStore(self._dbInfo.storeName);
                                                var advanced = false;
                                                var req = store.openKeyCursor();
                                                req.onsuccess = function () {
                                                    var cursor = req.result;
                                                    if (!cursor) {
                                                        resolve(null);
                                                        return;
                                                    }
                                                    if (n === 0) {
                                                        resolve(cursor.key);
                                                    }
                                                    else {
                                                        if (!advanced) {
                                                            advanced = true;
                                                            cursor.advance(n);
                                                        }
                                                        else {
                                                            resolve(cursor.key);
                                                        }
                                                    }
                                                };
                                                req.onerror = function () {
                                                    reject(req.error);
                                                };
                                            }
                                            catch (e) {
                                                reject(e);
                                            }
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function keys(callback) {
                                var self = this;
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        createTransaction(self._dbInfo, READ_ONLY, function (err, transaction) {
                                            if (err) {
                                                return reject(err);
                                            }
                                            try {
                                                var store = transaction.objectStore(self._dbInfo.storeName);
                                                var req = store.openKeyCursor();
                                                var keys = [];
                                                req.onsuccess = function () {
                                                    var cursor = req.result;
                                                    if (!cursor) {
                                                        resolve(keys);
                                                        return;
                                                    }
                                                    keys.push(cursor.key);
                                                    cursor["continue"]();
                                                };
                                                req.onerror = function () {
                                                    reject(req.error);
                                                };
                                            }
                                            catch (e) {
                                                reject(e);
                                            }
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function dropInstance(options, callback) {
                                callback = getCallback.apply(this, arguments);
                                var currentConfig = this.config();
                                options = typeof options !== 'function' && options || {};
                                if (!options.name) {
                                    options.name = options.name || currentConfig.name;
                                    options.storeName = options.storeName || currentConfig.storeName;
                                }
                                var self = this;
                                var promise;
                                if (!options.name) {
                                    promise = Promise$1.reject('Invalid arguments');
                                }
                                else {
                                    var isCurrentDb = options.name === currentConfig.name && self._dbInfo.db;
                                    var dbPromise = isCurrentDb ? Promise$1.resolve(self._dbInfo.db) : _getOriginalConnection(options).then(function (db) {
                                        var dbContext = dbContexts[options.name];
                                        var forages = dbContext.forages;
                                        dbContext.db = db;
                                        for (var i = 0; i < forages.length; i++) {
                                            forages[i]._dbInfo.db = db;
                                        }
                                        return db;
                                    });
                                    if (!options.storeName) {
                                        promise = dbPromise.then(function (db) {
                                            _deferReadiness(options);
                                            var dbContext = dbContexts[options.name];
                                            var forages = dbContext.forages;
                                            db.close();
                                            for (var i = 0; i < forages.length; i++) {
                                                var forage = forages[i];
                                                forage._dbInfo.db = null;
                                            }
                                            var dropDBPromise = new Promise$1(function (resolve, reject) {
                                                var req = idb.deleteDatabase(options.name);
                                                req.onerror = function () {
                                                    var db = req.result;
                                                    if (db) {
                                                        db.close();
                                                    }
                                                    reject(req.error);
                                                };
                                                req.onblocked = function () {
                                                    console.warn('dropInstance blocked for database "' + options.name + '" until all open connections are closed');
                                                };
                                                req.onsuccess = function () {
                                                    var db = req.result;
                                                    if (db) {
                                                        db.close();
                                                    }
                                                    resolve(db);
                                                };
                                            });
                                            return dropDBPromise.then(function (db) {
                                                dbContext.db = db;
                                                for (var i = 0; i < forages.length; i++) {
                                                    var _forage = forages[i];
                                                    _advanceReadiness(_forage._dbInfo);
                                                }
                                            })["catch"](function (err) {
                                                (_rejectReadiness(options, err) || Promise$1.resolve())["catch"](function () { });
                                                throw err;
                                            });
                                        });
                                    }
                                    else {
                                        promise = dbPromise.then(function (db) {
                                            if (!db.objectStoreNames.contains(options.storeName)) {
                                                return;
                                            }
                                            var newVersion = db.version + 1;
                                            _deferReadiness(options);
                                            var dbContext = dbContexts[options.name];
                                            var forages = dbContext.forages;
                                            db.close();
                                            for (var i = 0; i < forages.length; i++) {
                                                var forage = forages[i];
                                                forage._dbInfo.db = null;
                                                forage._dbInfo.version = newVersion;
                                            }
                                            var dropObjectPromise = new Promise$1(function (resolve, reject) {
                                                var req = idb.open(options.name, newVersion);
                                                req.onerror = function (err) {
                                                    var db = req.result;
                                                    db.close();
                                                    reject(err);
                                                };
                                                req.onupgradeneeded = function () {
                                                    var db = req.result;
                                                    db.deleteObjectStore(options.storeName);
                                                };
                                                req.onsuccess = function () {
                                                    var db = req.result;
                                                    db.close();
                                                    resolve(db);
                                                };
                                            });
                                            return dropObjectPromise.then(function (db) {
                                                dbContext.db = db;
                                                for (var j = 0; j < forages.length; j++) {
                                                    var _forage2 = forages[j];
                                                    _forage2._dbInfo.db = db;
                                                    _advanceReadiness(_forage2._dbInfo);
                                                }
                                            })["catch"](function (err) {
                                                (_rejectReadiness(options, err) || Promise$1.resolve())["catch"](function () { });
                                                throw err;
                                            });
                                        });
                                    }
                                }
                                executeCallback(promise, callback);
                                return promise;
                            }
                            var asyncStorage = {
                                _driver: 'asyncStorage',
                                _initStorage: _initStorage,
                                _support: isIndexedDBValid(),
                                iterate: iterate,
                                getItem: getItem,
                                setItem: setItem,
                                removeItem: removeItem,
                                clear: clear,
                                length: length,
                                key: key,
                                keys: keys,
                                dropInstance: dropInstance
                            };
                            function isWebSQLValid() {
                                return typeof openDatabase === 'function';
                            }
                            var BASE_CHARS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
                            var BLOB_TYPE_PREFIX = '~~local_forage_type~';
                            var BLOB_TYPE_PREFIX_REGEX = /^~~local_forage_type~([^~]+)~/;
                            var SERIALIZED_MARKER = '__lfsc__:';
                            var SERIALIZED_MARKER_LENGTH = SERIALIZED_MARKER.length;
                            var TYPE_ARRAYBUFFER = 'arbf';
                            var TYPE_BLOB = 'blob';
                            var TYPE_INT8ARRAY = 'si08';
                            var TYPE_UINT8ARRAY = 'ui08';
                            var TYPE_UINT8CLAMPEDARRAY = 'uic8';
                            var TYPE_INT16ARRAY = 'si16';
                            var TYPE_INT32ARRAY = 'si32';
                            var TYPE_UINT16ARRAY = 'ur16';
                            var TYPE_UINT32ARRAY = 'ui32';
                            var TYPE_FLOAT32ARRAY = 'fl32';
                            var TYPE_FLOAT64ARRAY = 'fl64';
                            var TYPE_SERIALIZED_MARKER_LENGTH = SERIALIZED_MARKER_LENGTH + TYPE_ARRAYBUFFER.length;
                            var toString$1 = Object.prototype.toString;
                            function stringToBuffer(serializedString) {
                                var bufferLength = serializedString.length * 0.75;
                                var len = serializedString.length;
                                var i;
                                var p = 0;
                                var encoded1, encoded2, encoded3, encoded4;
                                if (serializedString[serializedString.length - 1] === '=') {
                                    bufferLength--;
                                    if (serializedString[serializedString.length - 2] === '=') {
                                        bufferLength--;
                                    }
                                }
                                var buffer = new ArrayBuffer(bufferLength);
                                var bytes = new Uint8Array(buffer);
                                for (i = 0; i < len; i += 4) {
                                    encoded1 = BASE_CHARS.indexOf(serializedString[i]);
                                    encoded2 = BASE_CHARS.indexOf(serializedString[i + 1]);
                                    encoded3 = BASE_CHARS.indexOf(serializedString[i + 2]);
                                    encoded4 = BASE_CHARS.indexOf(serializedString[i + 3]);
                                    bytes[p++] = encoded1 << 2 | encoded2 >> 4;
                                    bytes[p++] = (encoded2 & 15) << 4 | encoded3 >> 2;
                                    bytes[p++] = (encoded3 & 3) << 6 | encoded4 & 63;
                                }
                                return buffer;
                            }
                            function bufferToString(buffer) {
                                var bytes = new Uint8Array(buffer);
                                var base64String = '';
                                var i;
                                for (i = 0; i < bytes.length; i += 3) {
                                    base64String += BASE_CHARS[bytes[i] >> 2];
                                    base64String += BASE_CHARS[(bytes[i] & 3) << 4 | bytes[i + 1] >> 4];
                                    base64String += BASE_CHARS[(bytes[i + 1] & 15) << 2 | bytes[i + 2] >> 6];
                                    base64String += BASE_CHARS[bytes[i + 2] & 63];
                                }
                                if (bytes.length % 3 === 2) {
                                    base64String = base64String.substring(0, base64String.length - 1) + '=';
                                }
                                else if (bytes.length % 3 === 1) {
                                    base64String = base64String.substring(0, base64String.length - 2) + '==';
                                }
                                return base64String;
                            }
                            function serialize(value, callback) {
                                var valueType = '';
                                if (value) {
                                    valueType = toString$1.call(value);
                                }
                                if (value && (valueType === '[object ArrayBuffer]' || value.buffer && toString$1.call(value.buffer) === '[object ArrayBuffer]')) {
                                    var buffer;
                                    var marker = SERIALIZED_MARKER;
                                    if (value instanceof ArrayBuffer) {
                                        buffer = value;
                                        marker += TYPE_ARRAYBUFFER;
                                    }
                                    else {
                                        buffer = value.buffer;
                                        if (valueType === '[object Int8Array]') {
                                            marker += TYPE_INT8ARRAY;
                                        }
                                        else if (valueType === '[object Uint8Array]') {
                                            marker += TYPE_UINT8ARRAY;
                                        }
                                        else if (valueType === '[object Uint8ClampedArray]') {
                                            marker += TYPE_UINT8CLAMPEDARRAY;
                                        }
                                        else if (valueType === '[object Int16Array]') {
                                            marker += TYPE_INT16ARRAY;
                                        }
                                        else if (valueType === '[object Uint16Array]') {
                                            marker += TYPE_UINT16ARRAY;
                                        }
                                        else if (valueType === '[object Int32Array]') {
                                            marker += TYPE_INT32ARRAY;
                                        }
                                        else if (valueType === '[object Uint32Array]') {
                                            marker += TYPE_UINT32ARRAY;
                                        }
                                        else if (valueType === '[object Float32Array]') {
                                            marker += TYPE_FLOAT32ARRAY;
                                        }
                                        else if (valueType === '[object Float64Array]') {
                                            marker += TYPE_FLOAT64ARRAY;
                                        }
                                        else {
                                            callback(new Error('Failed to get type for BinaryArray'));
                                        }
                                    }
                                    callback(marker + bufferToString(buffer));
                                }
                                else if (valueType === '[object Blob]') {
                                    var fileReader = new FileReader();
                                    fileReader.onload = function () {
                                        var str = BLOB_TYPE_PREFIX + value.type + '~' + bufferToString(this.result);
                                        callback(SERIALIZED_MARKER + TYPE_BLOB + str);
                                    };
                                    fileReader.readAsArrayBuffer(value);
                                }
                                else {
                                    try {
                                        callback(JSON.stringify(value));
                                    }
                                    catch (e) {
                                        console.error("Couldn't convert value into a JSON string: ", value);
                                        callback(null, e);
                                    }
                                }
                            }
                            function deserialize(value) {
                                if (value.substring(0, SERIALIZED_MARKER_LENGTH) !== SERIALIZED_MARKER) {
                                    return JSON.parse(value);
                                }
                                var serializedString = value.substring(TYPE_SERIALIZED_MARKER_LENGTH);
                                var type = value.substring(SERIALIZED_MARKER_LENGTH, TYPE_SERIALIZED_MARKER_LENGTH);
                                var blobType;
                                if (type === TYPE_BLOB && BLOB_TYPE_PREFIX_REGEX.test(serializedString)) {
                                    var matcher = serializedString.match(BLOB_TYPE_PREFIX_REGEX);
                                    blobType = matcher[1];
                                    serializedString = serializedString.substring(matcher[0].length);
                                }
                                var buffer = stringToBuffer(serializedString);
                                switch (type) {
                                    case TYPE_ARRAYBUFFER:
                                        return buffer;
                                    case TYPE_BLOB:
                                        return createBlob([buffer], { type: blobType });
                                    case TYPE_INT8ARRAY:
                                        return new Int8Array(buffer);
                                    case TYPE_UINT8ARRAY:
                                        return new Uint8Array(buffer);
                                    case TYPE_UINT8CLAMPEDARRAY:
                                        return new Uint8ClampedArray(buffer);
                                    case TYPE_INT16ARRAY:
                                        return new Int16Array(buffer);
                                    case TYPE_UINT16ARRAY:
                                        return new Uint16Array(buffer);
                                    case TYPE_INT32ARRAY:
                                        return new Int32Array(buffer);
                                    case TYPE_UINT32ARRAY:
                                        return new Uint32Array(buffer);
                                    case TYPE_FLOAT32ARRAY:
                                        return new Float32Array(buffer);
                                    case TYPE_FLOAT64ARRAY:
                                        return new Float64Array(buffer);
                                    default:
                                        throw new Error('Unkown type: ' + type);
                                }
                            }
                            var localforageSerializer = {
                                serialize: serialize,
                                deserialize: deserialize,
                                stringToBuffer: stringToBuffer,
                                bufferToString: bufferToString
                            };
                            function createDbTable(t, dbInfo, callback, errorCallback) {
                                t.executeSql('CREATE TABLE IF NOT EXISTS ' + dbInfo.storeName + ' ' + '(id INTEGER PRIMARY KEY, key unique, value)', [], callback, errorCallback);
                            }
                            function _initStorage$1(options) {
                                var self = this;
                                var dbInfo = {
                                    db: null
                                };
                                if (options) {
                                    for (var i in options) {
                                        dbInfo[i] = typeof options[i] !== 'string' ? options[i].toString() : options[i];
                                    }
                                }
                                var dbInfoPromise = new Promise$1(function (resolve, reject) {
                                    try {
                                        dbInfo.db = openDatabase(dbInfo.name, String(dbInfo.version), dbInfo.description, dbInfo.size);
                                    }
                                    catch (e) {
                                        return reject(e);
                                    }
                                    dbInfo.db.transaction(function (t) {
                                        createDbTable(t, dbInfo, function () {
                                            self._dbInfo = dbInfo;
                                            resolve();
                                        }, function (t, error) {
                                            reject(error);
                                        });
                                    }, reject);
                                });
                                dbInfo.serializer = localforageSerializer;
                                return dbInfoPromise;
                            }
                            function tryExecuteSql(t, dbInfo, sqlStatement, args, callback, errorCallback) {
                                t.executeSql(sqlStatement, args, callback, function (t, error) {
                                    if (error.code === error.SYNTAX_ERR) {
                                        t.executeSql('SELECT name FROM sqlite_master ' + "WHERE type='table' AND name = ?", [dbInfo.storeName], function (t, results) {
                                            if (!results.rows.length) {
                                                createDbTable(t, dbInfo, function () {
                                                    t.executeSql(sqlStatement, args, callback, errorCallback);
                                                }, errorCallback);
                                            }
                                            else {
                                                errorCallback(t, error);
                                            }
                                        }, errorCallback);
                                    }
                                    else {
                                        errorCallback(t, error);
                                    }
                                }, errorCallback);
                            }
                            function getItem$1(key, callback) {
                                var self = this;
                                key = normalizeKey(key);
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        var dbInfo = self._dbInfo;
                                        dbInfo.db.transaction(function (t) {
                                            tryExecuteSql(t, dbInfo, 'SELECT * FROM ' + dbInfo.storeName + ' WHERE key = ? LIMIT 1', [key], function (t, results) {
                                                var result = results.rows.length ? results.rows.item(0).value : null;
                                                if (result) {
                                                    result = dbInfo.serializer.deserialize(result);
                                                }
                                                resolve(result);
                                            }, function (t, error) {
                                                reject(error);
                                            });
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function iterate$1(iterator, callback) {
                                var self = this;
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        var dbInfo = self._dbInfo;
                                        dbInfo.db.transaction(function (t) {
                                            tryExecuteSql(t, dbInfo, 'SELECT * FROM ' + dbInfo.storeName, [], function (t, results) {
                                                var rows = results.rows;
                                                var length = rows.length;
                                                for (var i = 0; i < length; i++) {
                                                    var item = rows.item(i);
                                                    var result = item.value;
                                                    if (result) {
                                                        result = dbInfo.serializer.deserialize(result);
                                                    }
                                                    result = iterator(result, item.key, i + 1);
                                                    if (result !== void 0) {
                                                        resolve(result);
                                                        return;
                                                    }
                                                }
                                                resolve();
                                            }, function (t, error) {
                                                reject(error);
                                            });
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function _setItem(key, value, callback, retriesLeft) {
                                var self = this;
                                key = normalizeKey(key);
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        if (value === undefined) {
                                            value = null;
                                        }
                                        var originalValue = value;
                                        var dbInfo = self._dbInfo;
                                        dbInfo.serializer.serialize(value, function (value, error) {
                                            if (error) {
                                                reject(error);
                                            }
                                            else {
                                                dbInfo.db.transaction(function (t) {
                                                    tryExecuteSql(t, dbInfo, 'INSERT OR REPLACE INTO ' + dbInfo.storeName + ' ' + '(key, value) VALUES (?, ?)', [key, value], function () {
                                                        resolve(originalValue);
                                                    }, function (t, error) {
                                                        reject(error);
                                                    });
                                                }, function (sqlError) {
                                                    if (sqlError.code === sqlError.QUOTA_ERR) {
                                                        if (retriesLeft > 0) {
                                                            resolve(_setItem.apply(self, [key, originalValue, callback, retriesLeft - 1]));
                                                            return;
                                                        }
                                                        reject(sqlError);
                                                    }
                                                });
                                            }
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function setItem$1(key, value, callback) {
                                return _setItem.apply(this, [key, value, callback, 1]);
                            }
                            function removeItem$1(key, callback) {
                                var self = this;
                                key = normalizeKey(key);
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        var dbInfo = self._dbInfo;
                                        dbInfo.db.transaction(function (t) {
                                            tryExecuteSql(t, dbInfo, 'DELETE FROM ' + dbInfo.storeName + ' WHERE key = ?', [key], function () {
                                                resolve();
                                            }, function (t, error) {
                                                reject(error);
                                            });
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function clear$1(callback) {
                                var self = this;
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        var dbInfo = self._dbInfo;
                                        dbInfo.db.transaction(function (t) {
                                            tryExecuteSql(t, dbInfo, 'DELETE FROM ' + dbInfo.storeName, [], function () {
                                                resolve();
                                            }, function (t, error) {
                                                reject(error);
                                            });
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function length$1(callback) {
                                var self = this;
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        var dbInfo = self._dbInfo;
                                        dbInfo.db.transaction(function (t) {
                                            tryExecuteSql(t, dbInfo, 'SELECT COUNT(key) as c FROM ' + dbInfo.storeName, [], function (t, results) {
                                                var result = results.rows.item(0).c;
                                                resolve(result);
                                            }, function (t, error) {
                                                reject(error);
                                            });
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function key$1(n, callback) {
                                var self = this;
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        var dbInfo = self._dbInfo;
                                        dbInfo.db.transaction(function (t) {
                                            tryExecuteSql(t, dbInfo, 'SELECT key FROM ' + dbInfo.storeName + ' WHERE id = ? LIMIT 1', [n + 1], function (t, results) {
                                                var result = results.rows.length ? results.rows.item(0).key : null;
                                                resolve(result);
                                            }, function (t, error) {
                                                reject(error);
                                            });
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function keys$1(callback) {
                                var self = this;
                                var promise = new Promise$1(function (resolve, reject) {
                                    self.ready().then(function () {
                                        var dbInfo = self._dbInfo;
                                        dbInfo.db.transaction(function (t) {
                                            tryExecuteSql(t, dbInfo, 'SELECT key FROM ' + dbInfo.storeName, [], function (t, results) {
                                                var keys = [];
                                                for (var i = 0; i < results.rows.length; i++) {
                                                    keys.push(results.rows.item(i).key);
                                                }
                                                resolve(keys);
                                            }, function (t, error) {
                                                reject(error);
                                            });
                                        });
                                    })["catch"](reject);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function getAllStoreNames(db) {
                                return new Promise$1(function (resolve, reject) {
                                    db.transaction(function (t) {
                                        t.executeSql('SELECT name FROM sqlite_master ' + "WHERE type='table' AND name <> '__WebKitDatabaseInfoTable__'", [], function (t, results) {
                                            var storeNames = [];
                                            for (var i = 0; i < results.rows.length; i++) {
                                                storeNames.push(results.rows.item(i).name);
                                            }
                                            resolve({
                                                db: db,
                                                storeNames: storeNames
                                            });
                                        }, function (t, error) {
                                            reject(error);
                                        });
                                    }, function (sqlError) {
                                        reject(sqlError);
                                    });
                                });
                            }
                            function dropInstance$1(options, callback) {
                                callback = getCallback.apply(this, arguments);
                                var currentConfig = this.config();
                                options = typeof options !== 'function' && options || {};
                                if (!options.name) {
                                    options.name = options.name || currentConfig.name;
                                    options.storeName = options.storeName || currentConfig.storeName;
                                }
                                var self = this;
                                var promise;
                                if (!options.name) {
                                    promise = Promise$1.reject('Invalid arguments');
                                }
                                else {
                                    promise = new Promise$1(function (resolve) {
                                        var db;
                                        if (options.name === currentConfig.name) {
                                            db = self._dbInfo.db;
                                        }
                                        else {
                                            db = openDatabase(options.name, '', '', 0);
                                        }
                                        if (!options.storeName) {
                                            resolve(getAllStoreNames(db));
                                        }
                                        else {
                                            resolve({
                                                db: db,
                                                storeNames: [options.storeName]
                                            });
                                        }
                                    }).then(function (operationInfo) {
                                        return new Promise$1(function (resolve, reject) {
                                            operationInfo.db.transaction(function (t) {
                                                function dropTable(storeName) {
                                                    return new Promise$1(function (resolve, reject) {
                                                        t.executeSql('DROP TABLE IF EXISTS ' + storeName, [], function () {
                                                            resolve();
                                                        }, function (t, error) {
                                                            reject(error);
                                                        });
                                                    });
                                                }
                                                var operations = [];
                                                for (var i = 0, len = operationInfo.storeNames.length; i < len; i++) {
                                                    operations.push(dropTable(operationInfo.storeNames[i]));
                                                }
                                                Promise$1.all(operations).then(function () {
                                                    resolve();
                                                })["catch"](function (e) {
                                                    reject(e);
                                                });
                                            }, function (sqlError) {
                                                reject(sqlError);
                                            });
                                        });
                                    });
                                }
                                executeCallback(promise, callback);
                                return promise;
                            }
                            var webSQLStorage = {
                                _driver: 'webSQLStorage',
                                _initStorage: _initStorage$1,
                                _support: isWebSQLValid(),
                                iterate: iterate$1,
                                getItem: getItem$1,
                                setItem: setItem$1,
                                removeItem: removeItem$1,
                                clear: clear$1,
                                length: length$1,
                                key: key$1,
                                keys: keys$1,
                                dropInstance: dropInstance$1
                            };
                            function isLocalStorageValid() {
                                try {
                                    return typeof localStorage !== 'undefined' && 'setItem' in localStorage &&
                                        !!localStorage.setItem;
                                }
                                catch (e) {
                                    return false;
                                }
                            }
                            function _getKeyPrefix(options, defaultConfig) {
                                var keyPrefix = options.name + '/';
                                if (options.storeName !== defaultConfig.storeName) {
                                    keyPrefix += options.storeName + '/';
                                }
                                return keyPrefix;
                            }
                            function checkIfLocalStorageThrows() {
                                var localStorageTestKey = '_localforage_support_test';
                                try {
                                    localStorage.setItem(localStorageTestKey, true);
                                    localStorage.removeItem(localStorageTestKey);
                                    return false;
                                }
                                catch (e) {
                                    return true;
                                }
                            }
                            function _isLocalStorageUsable() {
                                return !checkIfLocalStorageThrows() || localStorage.length > 0;
                            }
                            function _initStorage$2(options) {
                                var self = this;
                                var dbInfo = {};
                                if (options) {
                                    for (var i in options) {
                                        dbInfo[i] = options[i];
                                    }
                                }
                                dbInfo.keyPrefix = _getKeyPrefix(options, self._defaultConfig);
                                if (!_isLocalStorageUsable()) {
                                    return Promise$1.reject();
                                }
                                self._dbInfo = dbInfo;
                                dbInfo.serializer = localforageSerializer;
                                return Promise$1.resolve();
                            }
                            function clear$2(callback) {
                                var self = this;
                                var promise = self.ready().then(function () {
                                    var keyPrefix = self._dbInfo.keyPrefix;
                                    for (var i = localStorage.length - 1; i >= 0; i--) {
                                        var key = localStorage.key(i);
                                        if (key.indexOf(keyPrefix) === 0) {
                                            localStorage.removeItem(key);
                                        }
                                    }
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function getItem$2(key, callback) {
                                var self = this;
                                key = normalizeKey(key);
                                var promise = self.ready().then(function () {
                                    var dbInfo = self._dbInfo;
                                    var result = localStorage.getItem(dbInfo.keyPrefix + key);
                                    if (result) {
                                        result = dbInfo.serializer.deserialize(result);
                                    }
                                    return result;
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function iterate$2(iterator, callback) {
                                var self = this;
                                var promise = self.ready().then(function () {
                                    var dbInfo = self._dbInfo;
                                    var keyPrefix = dbInfo.keyPrefix;
                                    var keyPrefixLength = keyPrefix.length;
                                    var length = localStorage.length;
                                    var iterationNumber = 1;
                                    for (var i = 0; i < length; i++) {
                                        var key = localStorage.key(i);
                                        if (key.indexOf(keyPrefix) !== 0) {
                                            continue;
                                        }
                                        var value = localStorage.getItem(key);
                                        if (value) {
                                            value = dbInfo.serializer.deserialize(value);
                                        }
                                        value = iterator(value, key.substring(keyPrefixLength), iterationNumber++);
                                        if (value !== void 0) {
                                            return value;
                                        }
                                    }
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function key$2(n, callback) {
                                var self = this;
                                var promise = self.ready().then(function () {
                                    var dbInfo = self._dbInfo;
                                    var result;
                                    try {
                                        result = localStorage.key(n);
                                    }
                                    catch (error) {
                                        result = null;
                                    }
                                    if (result) {
                                        result = result.substring(dbInfo.keyPrefix.length);
                                    }
                                    return result;
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function keys$2(callback) {
                                var self = this;
                                var promise = self.ready().then(function () {
                                    var dbInfo = self._dbInfo;
                                    var length = localStorage.length;
                                    var keys = [];
                                    for (var i = 0; i < length; i++) {
                                        var itemKey = localStorage.key(i);
                                        if (itemKey.indexOf(dbInfo.keyPrefix) === 0) {
                                            keys.push(itemKey.substring(dbInfo.keyPrefix.length));
                                        }
                                    }
                                    return keys;
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function length$2(callback) {
                                var self = this;
                                var promise = self.keys().then(function (keys) {
                                    return keys.length;
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function removeItem$2(key, callback) {
                                var self = this;
                                key = normalizeKey(key);
                                var promise = self.ready().then(function () {
                                    var dbInfo = self._dbInfo;
                                    localStorage.removeItem(dbInfo.keyPrefix + key);
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function setItem$2(key, value, callback) {
                                var self = this;
                                key = normalizeKey(key);
                                var promise = self.ready().then(function () {
                                    if (value === undefined) {
                                        value = null;
                                    }
                                    var originalValue = value;
                                    return new Promise$1(function (resolve, reject) {
                                        var dbInfo = self._dbInfo;
                                        dbInfo.serializer.serialize(value, function (value, error) {
                                            if (error) {
                                                reject(error);
                                            }
                                            else {
                                                try {
                                                    localStorage.setItem(dbInfo.keyPrefix + key, value);
                                                    resolve(originalValue);
                                                }
                                                catch (e) {
                                                    if (e.name === 'QuotaExceededError' || e.name === 'NS_ERROR_DOM_QUOTA_REACHED') {
                                                        reject(e);
                                                    }
                                                    reject(e);
                                                }
                                            }
                                        });
                                    });
                                });
                                executeCallback(promise, callback);
                                return promise;
                            }
                            function dropInstance$2(options, callback) {
                                callback = getCallback.apply(this, arguments);
                                options = typeof options !== 'function' && options || {};
                                if (!options.name) {
                                    var currentConfig = this.config();
                                    options.name = options.name || currentConfig.name;
                                    options.storeName = options.storeName || currentConfig.storeName;
                                }
                                var self = this;
                                var promise;
                                if (!options.name) {
                                    promise = Promise$1.reject('Invalid arguments');
                                }
                                else {
                                    promise = new Promise$1(function (resolve) {
                                        if (!options.storeName) {
                                            resolve(options.name + '/');
                                        }
                                        else {
                                            resolve(_getKeyPrefix(options, self._defaultConfig));
                                        }
                                    }).then(function (keyPrefix) {
                                        for (var i = localStorage.length - 1; i >= 0; i--) {
                                            var key = localStorage.key(i);
                                            if (key.indexOf(keyPrefix) === 0) {
                                                localStorage.removeItem(key);
                                            }
                                        }
                                    });
                                }
                                executeCallback(promise, callback);
                                return promise;
                            }
                            var localStorageWrapper = {
                                _driver: 'localStorageWrapper',
                                _initStorage: _initStorage$2,
                                _support: isLocalStorageValid(),
                                iterate: iterate$2,
                                getItem: getItem$2,
                                setItem: setItem$2,
                                removeItem: removeItem$2,
                                clear: clear$2,
                                length: length$2,
                                key: key$2,
                                keys: keys$2,
                                dropInstance: dropInstance$2
                            };
                            var sameValue = function sameValue(x, y) {
                                return x === y || typeof x === 'number' && typeof y === 'number' && isNaN(x) && isNaN(y);
                            };
                            var includes = function includes(array, searchElement) {
                                var len = array.length;
                                var i = 0;
                                while (i < len) {
                                    if (sameValue(array[i], searchElement)) {
                                        return true;
                                    }
                                    i++;
                                }
                                return false;
                            };
                            var isArray = Array.isArray || function (arg) {
                                return Object.prototype.toString.call(arg) === '[object Array]';
                            };
                            var DefinedDrivers = {};
                            var DriverSupport = {};
                            var DefaultDrivers = {
                                INDEXEDDB: asyncStorage,
                                WEBSQL: webSQLStorage,
                                LOCALSTORAGE: localStorageWrapper
                            };
                            var DefaultDriverOrder = [DefaultDrivers.INDEXEDDB._driver, DefaultDrivers.WEBSQL._driver, DefaultDrivers.LOCALSTORAGE._driver];
                            var OptionalDriverMethods = ['dropInstance'];
                            var LibraryMethods = ['clear', 'getItem', 'iterate', 'key', 'keys', 'length', 'removeItem', 'setItem'].concat(OptionalDriverMethods);
                            var DefaultConfig = {
                                description: '',
                                driver: DefaultDriverOrder.slice(),
                                name: 'localforage',
                                size: 4980736,
                                storeName: 'keyvaluepairs',
                                version: 1.0
                            };
                            function callWhenReady(localForageInstance, libraryMethod) {
                                localForageInstance[libraryMethod] = function () {
                                    var _args = arguments;
                                    return localForageInstance.ready().then(function () {
                                        return localForageInstance[libraryMethod].apply(localForageInstance, _args);
                                    });
                                };
                            }
                            function extend() {
                                for (var i = 1; i < arguments.length; i++) {
                                    var arg = arguments[i];
                                    if (arg) {
                                        for (var _key in arg) {
                                            if (arg.hasOwnProperty(_key)) {
                                                if (isArray(arg[_key])) {
                                                    arguments[0][_key] = arg[_key].slice();
                                                }
                                                else {
                                                    arguments[0][_key] = arg[_key];
                                                }
                                            }
                                        }
                                    }
                                }
                                return arguments[0];
                            }
                            var LocalForage = function () {
                                function LocalForage(options) {
                                    _classCallCheck(this, LocalForage);
                                    for (var driverTypeKey in DefaultDrivers) {
                                        if (DefaultDrivers.hasOwnProperty(driverTypeKey)) {
                                            var driver = DefaultDrivers[driverTypeKey];
                                            var driverName = driver._driver;
                                            this[driverTypeKey] = driverName;
                                            if (!DefinedDrivers[driverName]) {
                                                this.defineDriver(driver);
                                            }
                                        }
                                    }
                                    this._defaultConfig = extend({}, DefaultConfig);
                                    this._config = extend({}, this._defaultConfig, options);
                                    this._driverSet = null;
                                    this._initDriver = null;
                                    this._ready = false;
                                    this._dbInfo = null;
                                    this._wrapLibraryMethodsWithReady();
                                    this.setDriver(this._config.driver)["catch"](function () { });
                                }
                                LocalForage.prototype.config = function config(options) {
                                    if ((typeof options === 'undefined' ? 'undefined' : _typeof(options)) === 'object') {
                                        if (this._ready) {
                                            return new Error("Can't call config() after localforage " + 'has been used.');
                                        }
                                        for (var i in options) {
                                            if (i === 'storeName') {
                                                options[i] = options[i].replace(/\W/g, '_');
                                            }
                                            if (i === 'version' && typeof options[i] !== 'number') {
                                                return new Error('Database version must be a number.');
                                            }
                                            this._config[i] = options[i];
                                        }
                                        if ('driver' in options && options.driver) {
                                            return this.setDriver(this._config.driver);
                                        }
                                        return true;
                                    }
                                    else if (typeof options === 'string') {
                                        return this._config[options];
                                    }
                                    else {
                                        return this._config;
                                    }
                                };
                                LocalForage.prototype.defineDriver = function defineDriver(driverObject, callback, errorCallback) {
                                    var promise = new Promise$1(function (resolve, reject) {
                                        try {
                                            var driverName = driverObject._driver;
                                            var complianceError = new Error('Custom driver not compliant; see ' + 'https://mozilla.github.io/localForage/#definedriver');
                                            if (!driverObject._driver) {
                                                reject(complianceError);
                                                return;
                                            }
                                            var driverMethods = LibraryMethods.concat('_initStorage');
                                            for (var i = 0, len = driverMethods.length; i < len; i++) {
                                                var driverMethodName = driverMethods[i];
                                                var isRequired = !includes(OptionalDriverMethods, driverMethodName);
                                                if ((isRequired || driverObject[driverMethodName]) && typeof driverObject[driverMethodName] !== 'function') {
                                                    reject(complianceError);
                                                    return;
                                                }
                                            }
                                            var configureMissingMethods = function configureMissingMethods() {
                                                var methodNotImplementedFactory = function methodNotImplementedFactory(methodName) {
                                                    return function () {
                                                        var error = new Error('Method ' + methodName + ' is not implemented by the current driver');
                                                        var promise = Promise$1.reject(error);
                                                        executeCallback(promise, arguments[arguments.length - 1]);
                                                        return promise;
                                                    };
                                                };
                                                for (var _i = 0, _len = OptionalDriverMethods.length; _i < _len; _i++) {
                                                    var optionalDriverMethod = OptionalDriverMethods[_i];
                                                    if (!driverObject[optionalDriverMethod]) {
                                                        driverObject[optionalDriverMethod] = methodNotImplementedFactory(optionalDriverMethod);
                                                    }
                                                }
                                            };
                                            configureMissingMethods();
                                            var setDriverSupport = function setDriverSupport(support) {
                                                if (DefinedDrivers[driverName]) {
                                                    console.info('Redefining LocalForage driver: ' + driverName);
                                                }
                                                DefinedDrivers[driverName] = driverObject;
                                                DriverSupport[driverName] = support;
                                                resolve();
                                            };
                                            if ('_support' in driverObject) {
                                                if (driverObject._support && typeof driverObject._support === 'function') {
                                                    driverObject._support().then(setDriverSupport, reject);
                                                }
                                                else {
                                                    setDriverSupport(!!driverObject._support);
                                                }
                                            }
                                            else {
                                                setDriverSupport(true);
                                            }
                                        }
                                        catch (e) {
                                            reject(e);
                                        }
                                    });
                                    executeTwoCallbacks(promise, callback, errorCallback);
                                    return promise;
                                };
                                LocalForage.prototype.driver = function driver() {
                                    return this._driver || null;
                                };
                                LocalForage.prototype.getDriver = function getDriver(driverName, callback, errorCallback) {
                                    var getDriverPromise = DefinedDrivers[driverName] ? Promise$1.resolve(DefinedDrivers[driverName]) : Promise$1.reject(new Error('Driver not found.'));
                                    executeTwoCallbacks(getDriverPromise, callback, errorCallback);
                                    return getDriverPromise;
                                };
                                LocalForage.prototype.getSerializer = function getSerializer(callback) {
                                    var serializerPromise = Promise$1.resolve(localforageSerializer);
                                    executeTwoCallbacks(serializerPromise, callback);
                                    return serializerPromise;
                                };
                                LocalForage.prototype.ready = function ready(callback) {
                                    var self = this;
                                    var promise = self._driverSet.then(function () {
                                        if (self._ready === null) {
                                            self._ready = self._initDriver();
                                        }
                                        return self._ready;
                                    });
                                    executeTwoCallbacks(promise, callback, callback);
                                    return promise;
                                };
                                LocalForage.prototype.setDriver = function setDriver(drivers, callback, errorCallback) {
                                    var self = this;
                                    if (!isArray(drivers)) {
                                        drivers = [drivers];
                                    }
                                    var supportedDrivers = this._getSupportedDrivers(drivers);
                                    function setDriverToConfig() {
                                        self._config.driver = self.driver();
                                    }
                                    function extendSelfWithDriver(driver) {
                                        self._extend(driver);
                                        setDriverToConfig();
                                        self._ready = self._initStorage(self._config);
                                        return self._ready;
                                    }
                                    function initDriver(supportedDrivers) {
                                        return function () {
                                            var currentDriverIndex = 0;
                                            function driverPromiseLoop() {
                                                while (currentDriverIndex < supportedDrivers.length) {
                                                    var driverName = supportedDrivers[currentDriverIndex];
                                                    currentDriverIndex++;
                                                    self._dbInfo = null;
                                                    self._ready = null;
                                                    return self.getDriver(driverName).then(extendSelfWithDriver)["catch"](driverPromiseLoop);
                                                }
                                                setDriverToConfig();
                                                var error = new Error('No available storage method found.');
                                                self._driverSet = Promise$1.reject(error);
                                                return self._driverSet;
                                            }
                                            return driverPromiseLoop();
                                        };
                                    }
                                    var oldDriverSetDone = this._driverSet !== null ? this._driverSet["catch"](function () {
                                        return Promise$1.resolve();
                                    }) : Promise$1.resolve();
                                    this._driverSet = oldDriverSetDone.then(function () {
                                        var driverName = supportedDrivers[0];
                                        self._dbInfo = null;
                                        self._ready = null;
                                        return self.getDriver(driverName).then(function (driver) {
                                            self._driver = driver._driver;
                                            setDriverToConfig();
                                            self._wrapLibraryMethodsWithReady();
                                            self._initDriver = initDriver(supportedDrivers);
                                        });
                                    })["catch"](function () {
                                        setDriverToConfig();
                                        var error = new Error('No available storage method found.');
                                        self._driverSet = Promise$1.reject(error);
                                        return self._driverSet;
                                    });
                                    executeTwoCallbacks(this._driverSet, callback, errorCallback);
                                    return this._driverSet;
                                };
                                LocalForage.prototype.supports = function supports(driverName) {
                                    return !!DriverSupport[driverName];
                                };
                                LocalForage.prototype._extend = function _extend(libraryMethodsAndProperties) {
                                    extend(this, libraryMethodsAndProperties);
                                };
                                LocalForage.prototype._getSupportedDrivers = function _getSupportedDrivers(drivers) {
                                    var supportedDrivers = [];
                                    for (var i = 0, len = drivers.length; i < len; i++) {
                                        var driverName = drivers[i];
                                        if (this.supports(driverName)) {
                                            supportedDrivers.push(driverName);
                                        }
                                    }
                                    return supportedDrivers;
                                };
                                LocalForage.prototype._wrapLibraryMethodsWithReady = function _wrapLibraryMethodsWithReady() {
                                    for (var i = 0, len = LibraryMethods.length; i < len; i++) {
                                        callWhenReady(this, LibraryMethods[i]);
                                    }
                                };
                                LocalForage.prototype.createInstance = function createInstance(options) {
                                    return new LocalForage(options);
                                };
                                return LocalForage;
                            }();
                            var localforage_js = new LocalForage();
                            module.exports = localforage_js;
                        }, { "3": 3 }] }, {}, [4])(4);
            });
        }).call(this);
    }).call(this, typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
    _$localforage_1 = _$localforage_1.exports;
    var _$input_2 = {};
    (function (global) {
        (function () {
            "use strict";
            var _localforage = _interopRequireDefault(_$localforage_1);
            function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
            global["localforage"] = _localforage["default"];
        }).call(this);
    }).call(this, typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {});
}());