Progressive Web App (PWA) for Dart

Progressive web apps (PWA) are a hybrid of regular web pages (or websites) and a mobile application. This new application model attempts to combine features offered by most modern browsers with the benefits of mobile experience.

Warning: the API is experimental, and subject to change.

Background

PWA is using ServiceWorkers:

• https://pub.dartlang.org/packages/service_worker

Learn more about PWAs:

• https://developers.google.com/web/progressive-web-apps/
• https://pwa.rocks/

Articles about this packages:

• Making a Dart web app offline-capable: 3 lines of code

Tutorial and Examples

Getting started

• Getting started: pwa_defaults

  • Shows you how to use the pwa package and what it does.
  • Enables offline asset caching for you web app out-of-the-box.

• Additional offline urls: additional_offline_urls

  • Show you how to create the entry point for customization.
  • Gives you the ability to add additional URLs for the offline cache.

Customize caching

• Custom routes: custom_routes
  • Familiarize yourself with caching and routes.
  • Customize cache behavior for different parts of your app.

Push notification

• Push notification: push_notification
  • Check and/or request Push permission.
  • Trigger and handle push event, show notification.

Planned features

• Typed Window <-> Worker communication, both Streams and request-reply patterns, something like:

  typedef Future<S> AsyncFunction<R, S>(R request);
  typedef S WireAdapter<R, S>(R input);
  
  abstract class MessageHub {
  
    AsyncFunction<R, S> getFunction<R, S>(String type,
        {WireAdapter<R, dynamic> encoder, WireAdapter<dynamic, S> decoder});
  
    void setHandler<R, S>(String type, AsyncFunction<R, S> handler,
        {WireAdapter<dynamic, R> decoder, WireAdapter<S, dynamic> encoder});
  
    Sink<T> getSink<T>(String type, {WireAdapter<T, dynamic> encoder});
  
    Stream<T> getStream<T>(String type, {WireAdapter<dynamic, T> decoder});
  }

• Push Notification

  • notification for the client app
  • one-method registration and/or status request