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Edit File: localforage.d.ts

interface LocalForageDbInstanceOptions {
    name?: string;

storeName?: string;
}

interface LocalForageOptions extends LocalForageDbInstanceOptions {
    driver?: string | string[];

size?: number;

version?: number;

description?: string;
}

interface LocalForageDbMethodsCore {
    getItem<T>(key: string, callback?: (err: any, value: T | null) => void): Promise<T | null>;

setItem<T>(key: string, value: T, callback?: (err: any, value: T) => void): Promise<T>;

removeItem(key: string, callback?: (err: any) => void): Promise<void>;

clear(callback?: (err: any) => void): Promise<void>;

length(callback?: (err: any, numberOfKeys: number) => void): Promise<number>;

key(keyIndex: number, callback?: (err: any, key: string) => void): Promise<string>;

keys(callback?: (err: any, keys: string[]) => void): Promise<string[]>;

iterate<T, U>(iteratee: (value: T, key: string, iterationNumber: number) => U,
            callback?: (err: any, result: U) => void): Promise<U>;
}

interface LocalForageDropInstanceFn {
    (dbInstanceOptions?: LocalForageDbInstanceOptions, callback?: (err: any) => void): Promise<void>;
}

interface LocalForageDriverMethodsOptional {
    dropInstance?: LocalForageDropInstanceFn;
}

// duplicating LocalForageDriverMethodsOptional to preserve TS v2.0 support,
// since Partial<> isn't supported there
interface LocalForageDbMethodsOptional {
    dropInstance: LocalForageDropInstanceFn;
}

interface LocalForageDriverDbMethods extends LocalForageDbMethodsCore, LocalForageDriverMethodsOptional {}

interface LocalForageDriverSupportFunc {
    (): Promise<boolean>;
}

interface LocalForageDriver extends LocalForageDriverDbMethods {
    _driver: string;

_initStorage(options: LocalForageOptions): void;

_support?: boolean | LocalForageDriverSupportFunc;
}

interface LocalForageSerializer {
    serialize<T>(value: T | ArrayBuffer | Blob, callback: (value: string, error: any) => void): void;

deserialize<T>(value: string): T | ArrayBuffer | Blob;

stringToBuffer(serializedString: string): ArrayBuffer;

bufferToString(buffer: ArrayBuffer): string;
}

interface LocalForageDbMethods extends LocalForageDbMethodsCore, LocalForageDbMethodsOptional {}

interface LocalForage extends LocalForageDbMethods {
    LOCALSTORAGE: string;
    WEBSQL: string;
    INDEXEDDB: string;

/**
     * Set and persist localForage options. This must be called before any other calls to localForage are made, but can be called after localForage is loaded.
     * If you set any config values with this method they will persist after driver changes, so you can call config() then setDriver()
     * @param {LocalForageOptions} options?
     */
    config(options: LocalForageOptions): boolean;
    config(options: string): any;
    config(): LocalForageOptions;

/**
     * Create a new instance of localForage to point to a different store.
     * All the configuration options used by config are supported.
     * @param {LocalForageOptions} options
     */
    createInstance(options: LocalForageOptions): LocalForage;

driver(): string;

/**
     * Force usage of a particular driver or drivers, if available.
     * @param {string} driver
     */
    setDriver(driver: string | string[], callback?: () => void, errorCallback?: (error: any) => void): Promise<void>;

defineDriver(driver: LocalForageDriver, callback?: () => void, errorCallback?: (error: any) => void): Promise<void>;

/**
     * Return a particular driver
     * @param {string} driver
     */
    getDriver(driver: string): Promise<LocalForageDriver>;

getSerializer(callback?: (serializer: LocalForageSerializer) => void): Promise<LocalForageSerializer>;

supports(driverName: string): boolean;

ready(callback?: (error: any) => void): Promise<void>;
}

declare module "localforage" {
    let localforage: LocalForage;
    export = localforage;
}

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