Typings for using the Service Worker API with TypeScript

service-worker.d.ts

/**
 *
 * DEPRECIATED: Please use the updated type definitions:
 * Service Worker Typings to Supplement lib.webworker.d.ts
 * https://gist.github.com/tiernan/c18a380935e45a6d942ac1e88c5bbaf3
 *
 *
 * Copyright (c) 2016, Tiernan Cridland
 *
 * Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby
 * granted, provided that the above copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 *
 * DEPRECIATED: Typings for Service Worker circa 2016
 * @author Tiernan Cridland
 * @email [email protected]
 * @license: ISC
 * 
 * 2018 Update:
 * If this file is used in combination with lib.webworker.d.ts you will receive many errors.
 * It can still be used with the current lib.es5.d.ts; however, I recommend using the new edition listed at the top of
 * this file along with lib.webworker.d.ts and an es5+ library (es5, es2015, etc).
 * 
 * This gist will no longer be maintained.
 */

interface Navigator {
    serviceWorker: ServiceWorkerContainer;
}

interface ExtendableEvent extends Event {
    waitUntil(fn: Promise<any>): void;
}

interface ServiceWorker extends Worker {
    scriptURL: string;
    state: ServiceWorkerState;
}

interface ServiceWorkerContainer {
    controller?: ServiceWorker;
    oncontrollerchange?: (event?: Event) => any;
    onerror?: (event?: Event) => any;
    onmessage?: (event?: Event) => any;
    ready: Promise<ServiceWorkerRegistration>;
    getRegistration(scope?: string): Promise<ServiceWorkerRegistration>;
    getRegistrations(): Promise<Array<ServiceWorkerRegistration>>;
    register(url: string, options?: ServiceWorkerRegistrationOptions): Promise<ServiceWorkerRegistration>;
}

interface ServiceWorkerNotificationOptions {
    tag?: string;
}

interface ServiceWorkerRegistration {
    active?: ServiceWorker;
    installing?: ServiceWorker;
    onupdatefound?: (event?: Event) => any;
    pushManager: PushManager;
    scope: string;
    waiting?: ServiceWorker;
    getNotifications(options?: ServiceWorkerNotificationOptions): Promise<Array<Notification>>;
    update(): void;
    unregister(): Promise<boolean>;
}

interface ServiceWorkerRegistrationOptions {
    scope?: string;
}

type ServiceWorkerState = "installing" | "installed" | "activating" | "activated" | "redundant";

// CacheStorage API
interface Cache {
    add(request: Request): Promise<void>;
    addAll(requestArray: Array<Request>): Promise<void>;
    'delete'(request: Request, options?: CacheStorageOptions): Promise<boolean>;
    keys(request?: Request, options?: CacheStorageOptions): Promise<Array<string>>;
    match(request: Request, options?: CacheStorageOptions): Promise<Response>;
    matchAll(request: Request, options?: CacheStorageOptions): Promise<Array<Response>>;
    put(request: Request|string, response: Response): Promise<void>;
}

interface CacheStorage {
    'delete'(cacheName: string): Promise<boolean>;
    has(cacheName: string): Promise<boolean>;
    keys(): Promise<Array<string>>;
    match(request: Request, options?: CacheStorageOptions): Promise<Response>;
    open(cacheName: string): Promise<Cache>;
}

interface CacheStorageOptions {
    cacheName?: string;
    ignoreMethod?: boolean;
    ignoreSearch?: boolean;
    ignoreVary?: boolean;
}

// Client API
interface Client {
    frameType: ClientFrameType;
    id: string;
    url: string;
}

interface Clients {
    claim(): Promise<any>;
    get(id: string): Promise<Client>;
    matchAll(options?: ClientMatchOptions): Promise<Array<Client>>;
    openWindow(url: string): Promise<WindowClient>;
}

interface ClientMatchOptions {
    includeUncontrolled?: boolean;
    type?: ClientMatchTypes;
}

interface WindowClient {
    focused: boolean;
    visibilityState: WindowClientState;
    focus(): Promise<WindowClient>;
    navigate(url: string): Promise<WindowClient>;
}

type ClientFrameType = "auxiliary" | "top-level" | "nested" | "none";
type ClientMatchTypes = "window" | "worker" | "sharedworker" | "all";
type WindowClientState = "hidden" | "visible" | "prerender" | "unloaded";

// Events
interface InstallEvent extends ExtendableEvent {
    activeWorker: ServiceWorker;
}

interface ActivateEvent extends ExtendableEvent {
}

// Fetch API
interface Body {
    bodyUsed: boolean;
    arrayBuffer(): Promise<ArrayBuffer>;
    blob(): Promise<Blob>;
    formData(): Promise<FormData>;
    json(): Promise<any>;
    text(): Promise<string>;
}

interface FetchEvent extends ExtendableEvent {
    clientId: string;
    request: Request;
    respondWith(response: Promise<Response>|Response): Promise<Response>;
}

interface Headers {
    new(init?: any): Headers;
    append(name: string, value: string): void;
    'delete'(name: string): void;
    entries(): Array<Array<string>>;
    get(name: string): string;
    getAll(name: string): Array<string>;
    has(name: string): boolean;
    keys(): Array<string>;
    set(name: string, value: string): void;
    values(): Array<string>;
}

interface Request extends Body {
    new(url: string, init?: {
        method?: string,
        url?: string,
        referrer?: string,
        mode?: RequestMode,
        credentials?: RequestCredentials,
        redirect?: RequestRedirect,
        integrity?: string,
        cache?: RequestCache,
        headers?: Headers
    }): Request;
    cache: RequestCache;
    credentials: RequestCredentials;
    headers: Headers;
    integrity: string;
    method: string;
    mode: RequestMode;
    referrer: string;
    referrerPolicy: ReferrerPolicy;
    redirect: RequestRedirect;
    url: string;
    clone(): Request;
}

interface Response extends Body {
    new(url: string): Response;
    new(body: Blob|BufferSource|FormData|String, init: {
        status?: number,
        statusText?: string,
        headers?: Headers|{ [k: string]: string }
    }): Response;
    headers: Headers;
    ok: boolean;
    redirected: boolean;
    status: number;
    statusText: string;
    type: ResponseType;
    url: string;
    useFinalURL: boolean;
    clone(): Response;
    error(): Response;
    redirect(): Response;
}

// Notification API
interface Notification {
    body: string;
    data: any;
    icon: string;
    lang: string;
    requireInteraction: boolean;
    silent: boolean;
    tag: string;
    timestamp: number;
    title: string;
    close(): void;
    requestPermission(): Promise<string>;
}

interface NotificationEvent {
    action: string;
    notification: Notification;
}

// Push API
interface PushEvent extends ExtendableEvent {
    data: PushMessageData;
}

interface PushManager {
    getSubscription(): Promise<PushSubscription>;
    permissionState(): Promise<string>;
    subscribe(): Promise<PushSubscription>;
}

interface PushMessageData {
    arrayBuffer(): ArrayBuffer;
    blob(): Blob;
    json(): any;
    text(): string;
}

interface PushSubscription {
    endpoint: string;
    getKey(method: string): ArrayBuffer;
    toJSON(): string;
    unsubscribe(): Promise<boolean>;
}

// Sync API
interface SyncEvent extends Event {
    lastChance: boolean;
    tag: string;
}

// ServiceWorkerGlobalScope
declare var Headers: Headers;
declare var Response: Response;
declare var Request: Request;
declare var caches: CacheStorage;
declare var clients: Clients;
declare var onactivate: (event?: ActivateEvent) => any;
declare var onfetch: (event?: FetchEvent) => any;
declare var oninstall: (event?: InstallEvent) => any;
declare var onmessage: (event: MessageEvent) => any;
declare var onnotificationclick: (event?: NotificationEvent) => any;
declare var onnotificationclose: (event?: NotificationEvent) => any;
declare var onpush: (event?: PushEvent) => any;
declare var onpushsubscriptionchange: () => any;
declare var onsync: (event?: SyncEvent) => any;
declare var registration: ServiceWorkerRegistration;

declare function fetch(request: Request|string): Promise<Response>;
declare function skipWaiting(): void;
                                   

In TypeScript, the new method is specifically reserved as a constructor identifier and should therefore only be used within classes and not in interfaces. One way around this problem is to create a class that implements the interface.
I have an edited version of this file for those who want to use it in this version.

Expand service-worker.d.ts

interface Navigator {
    serviceWorker: ServiceWorkerContainer
}

interface ExtendableEvent extends Event {
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    waitUntil(fn: Promise<any>): void
}

interface ServiceWorker extends Worker {
    scriptURL: string
    state: ServiceWorkerState
}

interface ServiceWorkerContainer {
    controller?: ServiceWorker
    /* eslint-disable @typescript-eslint/no-explicit-any */
    oncontrollerchange?: (event?: Event) => any
    onerror?: (event?: Event) => any
    onmessage?: (event?: Event) => any
    /* eslint-enable @typescript-eslint/no-explicit-any */
    ready: Promise<ServiceWorkerRegistration>
    getRegistration(scope?: string): Promise<ServiceWorkerRegistration>
    getRegistrations(): Promise<Array<ServiceWorkerRegistration>>
    register(url: string, options?: ServiceWorkerRegistrationOptions): Promise<ServiceWorkerRegistration>
}

interface ServiceWorkerNotificationOptions {
    tag?: string
}

interface ServiceWorkerRegistration {
    active?: ServiceWorker
    installing?: ServiceWorker
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    onupdatefound?: (event?: Event) => any
    pushManager: PushManager
    scope: string
    waiting?: ServiceWorker
    getNotifications(options?: ServiceWorkerNotificationOptions): Promise<Array<Notification>>
    update(): void
    unregister(): Promise<boolean>
}

interface ServiceWorkerRegistrationOptions {
    scope?: string
}

type ServiceWorkerState = 'installing' | 'installed' | 'activating' | 'activated' | 'redundant'

// CacheStorage API
interface Cache {
    add(request: Request): Promise<void>
    addAll(requestArray: Array<Request>): Promise<void>
    'delete'(request: Request, options?: CacheStorageOptions): Promise<boolean>
    keys(request?: Request, options?: CacheStorageOptions): Promise<Array<string>>
    match(request: Request, options?: CacheStorageOptions): Promise<Response>
    matchAll(request: Request, options?: CacheStorageOptions): Promise<Array<Response>>
    put(request: Request | string, response: Response): Promise<void>
}

interface CacheStorage {
    'delete'(cacheName: string): Promise<boolean>
    has(cacheName: string): Promise<boolean>
    keys(): Promise<Array<string>>
    match(request: Request, options?: CacheStorageOptions): Promise<Response>
    open(cacheName: string): Promise<Cache>
}

interface CacheStorageOptions {
    cacheName?: string
    ignoreMethod?: boolean
    ignoreSearch?: boolean
    ignoreVary?: boolean
}

// Client API
interface Client {
    frameType: ClientFrameType
    id: string
    url: string
}

interface Clients {
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    claim(): Promise<any>
    get(id: string): Promise<Client>
    matchAll(options?: ClientMatchOptions): Promise<Array<Client>>
    openWindow(url: string): Promise<WindowClient>
}

interface ClientMatchOptions {
    includeUncontrolled?: boolean
    type?: ClientMatchTypes
}

interface WindowClient {
    focused: boolean
    visibilityState: WindowClientState
    focus(): Promise<WindowClient>
    navigate(url: string): Promise<WindowClient>
}

type ClientFrameType = 'auxiliary' | 'top-level' | 'nested' | 'none'
type ClientMatchTypes = 'window' | 'worker' | 'sharedworker' | 'all'
type WindowClientState = 'hidden' | 'visible' | 'prerender' | 'unloaded'

// Fetch API
interface Body {
    bodyUsed: boolean
    arrayBuffer(): Promise<ArrayBuffer>
    blob(): Promise<Blob>
    formData(): Promise<FormData>
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    json(): Promise<any>
    text(): Promise<string>
}

interface FetchEvent extends Event {
    request: Request
    respondWith(response: Promise<Response> | Response): Promise<Response>
}

interface InstallEvent extends ExtendableEvent {
    activeWorker: ServiceWorker
}

type ActivateEvent = ExtendableEvent

interface HeadersInit {
    [name: string]: string
}

interface Headers {
    append(name: string, value: string): void
    delete(name: string): void
    entries(): IterableIterator<[string, string]>
    get(name: string): string | null
    has(name: string): boolean
    set(name: string, value: string): void
    keys(): IterableIterator<string>
    values(): IterableIterator<string>
}

interface HeadersConstructor {
    new(init?: HeadersInit): Headers
}

interface RequestInit {
    cache?: 'default' | 'no-store' | 'reload' | 'no-cache' | 'force-cache'
    credentials?: 'omit' | 'same-origin' | 'include'
    headers?: Headers
    integrity?: string
    method?: string
    mode?: 'cors' | 'no-cors' | 'same-origin' | 'navigate'
    redirect?: 'follow' | 'error' | 'manual'
    referrer?: string
    url?: string
}

interface Request {
    cache: RequestCache
    credentials: RequestCredentials
    headers: Headers
    integrity: string
    method: string
    mode: RequestMode
    redirect: RequestRedirect
    referrer: string
    referrerPolicy: ReferrerPolicy
    url: string
    clone(): Request
}

interface RequestConstructor {
    new(
        url: string,
        init?: RequestInit,
    ): Request
}

interface ResponseInit {
    headers?: Headers | { [key: string]: string }
    status?: number
    statusText?: string
}

interface Response extends Body {
    headers: Headers
    ok: boolean
    redirected: boolean
    status: number
    statusText: string
    type: ResponseType
    url: string
    useFinalURL: boolean
    clone(): Response
    error(): Response
    redirect(url: string, status?: number): Response
}

interface ResponseConstructor {
    new(body?: Blob | BufferSource | FormData | string, init?: ResponseInit): Response
}

type ReferrerPolicy = '' | 'no-referrer' | 'no-referrer-when-downgrade' | 'origin-only' | 'origin-when-cross-origin' |
'unsafe-url'
type RequestCache = 'default' | 'no-store' | 'reload' | 'no-cache' | 'force-cache'
type RequestCredentials = 'omit' | 'same-origin' | 'include'
type RequestMode = 'cors' | 'no-cors' | 'same-origin' | 'navigate'
type RequestRedirect = 'follow' | 'error' | 'manual'
type ResponseType = 'basic' | 'cores' | 'error' | 'opaque'

// Notification API
interface Notification {
    body: string
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    data: any
    icon: string
    lang: string
    requireInteraction: boolean
    silent: boolean
    tag: string
    timestamp: number
    title: string
    close(): void
    requestPermission(): Promise<string>
}

interface NotificationEvent {
    action: string
    notification: Notification
}

// Push API
interface PushEvent extends ExtendableEvent {
    data: PushMessageData
}

interface PushManager {
    getSubscription(): Promise<PushSubscription>
    permissionState(): Promise<string>
    subscribe(): Promise<PushSubscription>
}

interface PushMessageData {
    arrayBuffer(): ArrayBuffer
    blob(): Blob
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    json(): any
    text(): string
}

interface PushSubscription {
    endpoint: string
    getKey(method: string): ArrayBuffer
    toJSON(): string
    unsubscribe(): Promise<boolean>
}

// Sync API
interface SyncEvent extends Event {
    lastChance: boolean
    tag: string
}

// ServiceWorkerGlobalScope
/* eslint-disable no-var */
declare var Headers: Headers
declare var Response: Response
declare var Request: Request
/* eslint-enable no-var */
declare let caches: CacheStorage
declare let clients: Clients
/* eslint-disable @typescript-eslint/no-explicit-any */
declare let onactivate: (event?: ExtendableEvent) => any
declare let onfetch: (event?: FetchEvent) => any
declare let oninstall: (event?: ExtendableEvent) => any
declare let onmessage: (event: MessageEvent) => any
declare let onnotificationclick: (event?: NotificationEvent) => any
declare let onnotificationclose: (event?: NotificationEvent) => any
declare let onpush: (event?: PushEvent) => any
declare let onpushsubscriptionchange: () => any
declare let onsync: (event?: SyncEvent) => any
/* eslint-enable @typescript-eslint/no-explicit-any */
declare let registration: ServiceWorkerRegistration

declare function fetch(request: Request | string): Promise<Response>
declare function skipWaiting(): void