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Service Worker Packages

Below is the list of service worker packages that Workbox provides. Each packages serves a specific need and can be used together or on its own.


Use background sync to reliably make a network request even if the user is offline.


Send messages to pages (via Broadcast Channels) when a cache is updated with a new response.


Restrict which requests are cached based on a response's status code or headers.


Alter log levels and change cache names via workbox-core. Contains shared code used by all Workbox libraries.


Removed cached requests based on the number of items in a cache or the age of the cached request.


See how users are interacting with your site when they are offline.


Enable navigation preload, to get a network response for navigation requests faster.


Easily precache a set of files and efficiently manage updates to files.


This modules provides support for responding to a Range: request using a slice of previously cached data.


Routes requests in your service worker to specific caching strategies or callback functions.


A set of runtime caching strategies that will handle responding to a request, normally used with workbox-routing.


This modules provides support for composing a response from a series of streaming sources.

Window Packages

Workbox provides modules that run in the window context and complement the service worker packages.


A module that helps with registering a service worker, managing updates, and responding to lifecycle events.

Node Modules

Workbox provides a set of Node modules that make it easy to generate a list of files to precache in your service worker or create a complete service worker that you can use without writing any code.

Workbox CLI

Generate a complete service worker, inject a precache manifest or copy the Workbox files from the command line.


An npm module that can generate a complete service worker, inject a precache manifest and copy the Workbox files.


As part of your Webpack build process add Workbox and precache assets.

Loader (CDN)

Workbox provides a way to load its service worker packages from a CDN (or custom endpoint). This makes it easy to get started with Workbox without having to set up a build process.


Manages dynamic loading of Workbox service worker packages as needed and provides additional helper methods.