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https://github.com/felangel/bloc

A predictable state management library that helps implement the BLoC design pattern
https://github.com/felangel/bloc
angulardart bloc concurrency dart dart-library dart-web dartlang flutter flutter-package library state-management
Last synced: 11 days ago
JSON representation
A predictable state management library that helps implement the BLoC design pattern
Host: GitHub
URL: https://github.com/felangel/bloc
Owner: felangel
License: mit
Created: 2018-10-07T19:32:59.000Z (about 6 years ago)
Default Branch: master
Last Pushed: 2024-05-29T06:33:13.000Z (5 months ago)
Last Synced: 2024-05-29T19:20:29.308Z (5 months ago)
Topics: angulardart, bloc, concurrency, dart, dart-library, dart-web, dartlang, flutter, flutter-package, library, state-management
Language: Dart
Homepage: https://bloclibrary.dev
Size: 57.2 MB
Stars: 11,470
Watchers: 176
Forks: 3,372
Open Issues: 79
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- Funding: .github/FUNDING.yml
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
- Codeowners: .github/CODEOWNERS
Awesome Lists containing this project

awesome-state - bloc
awesome-github-repos - felangel/bloc - A predictable state management library that helps implement the BLoC design pattern (Dart)
awesome-starts - felangel/bloc - A predictable state management library that helps implement the BLoC design pattern (Dart)
StarryDivineSky - felangel/bloc
README

        




























---

A predictable state management library that helps implement the BLoC design pattern.

| Package                                                                                    | Pub                                                                                                            |

| ------------------------------------------------------------------------------------------ | -------------------------------------------------------------------------------------------------------------- |

| [bloc](https://github.com/felangel/bloc/tree/master/packages/bloc)                         | [![pub package](https://img.shields.io/pub/v/bloc.svg)](https://pub.dev/packages/bloc)                         |

| [bloc_test](https://github.com/felangel/bloc/tree/master/packages/bloc_test)               | [![pub package](https://img.shields.io/pub/v/bloc_test.svg)](https://pub.dev/packages/bloc_test)               |

| [bloc_concurrency](https://github.com/felangel/bloc/tree/master/packages/bloc_concurrency) | [![pub package](https://img.shields.io/pub/v/bloc_concurrency.svg)](https://pub.dev/packages/bloc_concurrency) |

| [flutter_bloc](https://github.com/felangel/bloc/tree/master/packages/flutter_bloc)         | [![pub package](https://img.shields.io/pub/v/flutter_bloc.svg)](https://pub.dev/packages/flutter_bloc)         |

| [angular_bloc](https://github.com/felangel/bloc/tree/master/packages/angular_bloc)         | [![pub package](https://img.shields.io/pub/v/angular_bloc.svg)](https://pub.dev/packages/angular_bloc)         |

| [hydrated_bloc](https://github.com/felangel/bloc/tree/master/packages/hydrated_bloc)       | [![pub package](https://img.shields.io/pub/v/hydrated_bloc.svg)](https://pub.dev/packages/hydrated_bloc)       |

| [replay_bloc](https://github.com/felangel/bloc/tree/master/packages/replay_bloc)           | [![pub package](https://img.shields.io/pub/v/replay_bloc.svg)](https://pub.dev/packages/replay_bloc)           |

---

## Sponsors

Our top sponsors are shown below! [[Become a Sponsor](https://github.com/sponsors/felangel)]

    

        

            

                

            

            

                

            

            

                

            

        

        

            

                

            

            

                

            

            

                

            

        

    

---

## Overview



The goal of this library is to make it easy to separate _presentation_ from _business logic_, facilitating testability and reusability.

## Documentation

- [Official Documentation](https://bloclibrary.dev)

- [Bloc Package](https://github.com/felangel/bloc/tree/master/packages/bloc/README.md)

- [Bloc Test Package](https://github.com/felangel/bloc/tree/master/packages/bloc_test/README.md)

- [Bloc Concurrency Package](https://github.com/felangel/bloc/tree/master/packages/bloc_concurrency/README.md)

- [Flutter Bloc Package](https://github.com/felangel/bloc/tree/master/packages/flutter_bloc/README.md)

- [Angular Bloc Package](https://github.com/felangel/bloc/tree/master/packages/angular_bloc/README.md)

- [Hydrated Bloc Package](https://github.com/felangel/bloc/tree/master/packages/hydrated_bloc/README.md)

- [Replay Bloc Package](https://github.com/felangel/bloc/tree/master/packages/replay_bloc/README.md)

## Migration

- [Migration Guide](https://bloclibrary.dev/migration)

## Examples



    

        

            

                

                    

                

                        

            

                

                    

                

            

            

                

                    

                

            

        

        

            

                

                    

                

            

            

                

                    

                

            

            

                

                    

                

            

        

    



### Dart

- [Counter](https://github.com/felangel/bloc/tree/master/packages/bloc/example) - an example of how to create a `CounterBloc` (pure dart).

### Flutter

- [Counter](https://bloclibrary.dev/tutorials/flutter-counter) - an example of how to create a `CounterBloc` to implement the classic Flutter Counter app.

- [Form Validation](https://github.com/felangel/bloc/tree/master/examples/flutter_form_validation) - an example of how to use the `bloc` and `flutter_bloc` packages to implement form validation.

- [Bloc with Stream](https://github.com/felangel/bloc/tree/master/examples/flutter_bloc_with_stream) - an example of how to hook up a `bloc` to a `Stream` and update the UI in response to data from the `Stream`.

- [Complex List](https://github.com/felangel/bloc/tree/master/examples/flutter_complex_list) - an example of how to manage a list of items and asynchronously delete items one at a time using `bloc` and `flutter_bloc`.

- [Infinite List](https://bloclibrary.dev/tutorials/flutter-infinite-list) - an example of how to use the `bloc` and `flutter_bloc` packages to implement an infinite scrolling list.

- [Login Flow](https://bloclibrary.dev/tutorials/flutter-login) - an example of how to use the `bloc` and `flutter_bloc` packages to implement a Login Flow.

- [Firebase Login](https://bloclibrary.dev/tutorials/flutter-firebase-login) - an example of how to use the `bloc` and `flutter_bloc` packages to implement login via Firebase.

- [Github Search](https://bloclibrary.dev/tutorials/github-search) - an example of how to create a Github Search Application using the `bloc` and `flutter_bloc` packages.

- [Weather](https://bloclibrary.dev/tutorials/flutter-weather) - an example of how to create a Weather Application using the `bloc` and `flutter_bloc` packages. The app uses a `RefreshIndicator` to implement "pull-to-refresh" as well as dynamic theming.

- [Todos](https://bloclibrary.dev/tutorials/flutter-todos) - an example of how to create a Todos Application using the `bloc` and `flutter_bloc` packages.

- [Timer](https://bloclibrary.dev/tutorials/flutter-timer) - an example of how to create a Timer using the `bloc` and `flutter_bloc` packages.

- [Shopping Cart](https://github.com/felangel/bloc/tree/master/examples/flutter_shopping_cart) - an example of how to create a Shopping Cart Application using the `bloc` and `flutter_bloc` packages based on [flutter samples](https://github.com/flutter/samples/tree/master/provider_shopper).

- [Dynamic Form](https://github.com/felangel/bloc/tree/master/examples/flutter_dynamic_form) - an example of how to use the `bloc` and `flutter_bloc` packages to implement a dynamic form which pulls data from a repository.

- [Wizard](https://github.com/felangel/bloc/tree/master/examples/flutter_wizard) - an example of how to build a multi-step wizard using the `bloc` and `flutter_bloc` packages.

- [Fluttersaurus](https://github.com/felangel/fluttersaurus) - an example of how to use the `bloc` and `flutter_bloc` packages to create a thesaurus app -- made for Bytconf Flutter 2020.

- [I/O Photo Booth](https://github.com/flutter/photobooth) - an example of how to use the `bloc` and `flutter_bloc` packages to create a virtual photo booth web app -- made for Google I/O 2021.

- [I/O Pinball](https://github.com/flutter/pinball) - an example of how to use the `bloc` and `flutter_bloc` packages to create a pinball web app -- made for Google I/O 2022.

- [I/O Holobooth](https://github.com/flutter/holobooth) - an example of how to use the `bloc` and `flutter_bloc` packages to create a virtual photobooth experience -- made for Flutter Forward.

- [I/O Flip](https://github.com/flutter/io_flip) - an example of how to use the `bloc`, `flutter_bloc`, and `flame_bloc` packages to create a card game -- made for Google I/O 2023.

### Web

- [Counter](https://github.com/felangel/Bloc/tree/master/examples/angular_counter) - an example of how to use a `CounterBloc` in an AngularDart app.

- [Github Search](https://github.com/felangel/Bloc/tree/master/examples/github_search/angular_github_search) - an example of how to create a Github Search Application using the `bloc` and `angular_bloc` packages.

### Flutter + Web

- [Github Search](https://github.com/felangel/Bloc/tree/master/examples/github_search) - an example of how to create a Github Search Application and share code between Flutter and AngularDart.

## Articles

- [Bloc package](https://medium.com/flutter-community/flutter-bloc-package-295b53e95c5c) - An intro to the bloc package with high level architecture and examples.

- [Login tutorial with flutter_bloc](https://medium.com/flutter-community/flutter-login-tutorial-with-flutter-bloc-ea606ef701ad) - How to create a full login flow using the bloc and flutter_bloc packages.

- [Unit testing with bloc](https://medium.com/@felangelov/unit-testing-with-bloc-b94de9655d86) - How to unit test the blocs created in the flutter login tutorial.

- [Infinite list tutorial with flutter_bloc](https://medium.com/flutter-community/flutter-infinite-list-tutorial-with-flutter-bloc-2fc7a272ec67) - How to create an infinite list using the bloc and flutter_bloc packages.

- [Code sharing with bloc](https://medium.com/flutter-community/code-sharing-with-bloc-b867302c18ef) - How to share code between a mobile application written with Flutter and a web application written with AngularDart.

- [Weather app tutorial with flutter_bloc](https://medium.com/flutter-community/weather-app-with-flutter-bloc-e24a7253340d) - How to build a weather app which supports dynamic theming, pull-to-refresh, and interacting with a REST API using the bloc and flutter_bloc packages.

- [Todos app tutorial with flutter_bloc](https://medium.com/flutter-community/flutter-todos-tutorial-with-flutter-bloc-d9dd833f9df3) - How to build a todos app using the bloc and flutter_bloc packages.

- [Firebase login tutorial with flutter_bloc](https://medium.com/flutter-community/firebase-login-with-flutter-bloc-47455e6047b0) - How to create a fully functional login/sign up flow using the bloc and flutter_bloc packages with Firebase Authentication and Google Sign In.

- [Flutter timer tutorial with flutter_bloc](https://medium.com/flutter-community/flutter-timer-with-flutter-bloc-a464e8332ceb) - How to create a timer app using the bloc and flutter_bloc packages.

- [Firestore todos tutorial with flutter_bloc](https://medium.com/flutter-community/firestore-todos-with-flutter-bloc-7b2d5fadcc80) - How to create a todos app using the bloc and flutter_bloc packages that integrates with cloud firestore.

## Books

- [Flutter Complete Reference](https://fluttercompletereference.com/) - A book about the Dart programming language (version 2.10, with null safety support) and the Flutter framework (version 1.20). It covers the bloc package (version 6.0.3) in all flavors: bloc, flutter_bloc hydrated_bloc, replay_bloc, bloc_test and cubit.

## Extensions

- [IntelliJ](https://plugins.jetbrains.com/plugin/12129-bloc-code-generator) - extends IntelliJ/Android Studio with support for the Bloc library and provides tools for effectively creating Blocs for both Flutter and AngularDart apps.

- [VSCode](https://marketplace.visualstudio.com/items?itemName=FelixAngelov.bloc#overview) - extends VSCode with support for the Bloc library and provides tools for effectively creating Blocs for both Flutter and AngularDart apps.

## Community

Learn more at the following links, which have been contributed by the community.

### Packages

- [Bloc.js](https://github.com/felangel/bloc.js) - A port of the `bloc` state management library from Dart to JavaScript, by [Felix Angelov](https://github.com/felangel).

- [Firebase Auth](https://pub.dev/packages/fb_auth) - A Web, Mobile Firebase Auth Plugin, by [Rody Davis](https://github.com/AppleEducate).

- [Form Bloc](https://pub.dev/packages/form_bloc) - An easy way to create forms with BLoC pattern without writing a lot of boilerplate code, by [Giancarlo](https://github.com/GiancarloCode).

- [Flame Bloc](https://pub.dev/packages/flame_bloc) - Bloc integration for the Flame game engine, by [Flame Engine](https://github.com/flame-engine).

### Video Tutorials

- [Bloc Library: Basics and Beyond 🚀](https://youtu.be/knMvKPKBzGE) - Talk given at [Flutter Europe](https://fluttereurope.dev) about the basics of the bloc library, by [Felix Angelov](https://github.com/felangel).

- [Flutter Bloc Library Tutorial](https://www.youtube.com/watch?v=hTExlt1nJZI) - Introduction to the Bloc Library, by [Reso Coder](https://resocoder.com).

- [Flutter Youtube Search](https://www.youtube.com/watch?v=BJY8nuYUM7M) - How to build a Youtube Search app which interacts with an API using the bloc and flutter_bloc packages, by [Reso Coder](https://resocoder.com).

- [Flutter Bloc - AUTOMATIC LOOKUP - v0.20 (and Up), Updated Tutorial](https://www.youtube.com/watch?v=_vOpPuVfmiU) - Updated Tutorial on the Flutter Bloc Package, by [Reso Coder](https://resocoder.com).

- [Dynamic Theming with flutter_bloc](https://www.youtube.com/watch?v=YYbhkg-W8Mg) - Tutorial on how to use the flutter_bloc package to implement dynamic theming, by [Reso Coder](https://resocoder.com).

- [Persist Bloc State in Flutter](https://www.youtube.com/watch?v=vSOpZd_FFEY) - Tutorial on how to use the hydrated_bloc package to automatically persist app state, by [Reso Coder](https://resocoder.com).

- [State Management Foundation](https://www.youtube.com/watch?v=S2KmxzgsTwk&t=731s) - Introduction to state management using the flutter_bloc package, by [Techie Blossom](https://techieblossom.com).

- [Flutter Football Player Search](https://www.youtube.com/watch?v=S2KmxzgsTwk) - How to build a Football Player Search app which interacts with an API using the bloc and flutter_bloc packages, by [Techie Blossom](https://techieblossom.com).

- [Learning the Flutter Bloc Package](https://www.youtube.com/watch?v=eAiCPl3yk9A&t=1s) - Learning the flutter_bloc package live, by [Robert Brunhage](https://www.youtube.com/channel/UCSLIg5O0JiYO1i2nD4RclaQ)

- [Bloc Test Tutorial](https://www.youtube.com/watch?v=S6jFBiiP0Mc) - Tutorial on how to unit test blocs using the bloc_test package, by [Reso Coder](https://resocoder.com).

- [Bloc - from Zero to Hero](https://www.youtube.com/playlist?list=PLptHs0ZDJKt_T-oNj_6Q98v-tBnVf-S_o) - Playlist which includes everything needed to get started with bloc, by [Flutterly](https://www.youtube.com/channel/UC5PYcSe3to4mtm3SPCUmjvw).

- [Bloc (Full Course, 11+ Hours) - Flutter State Management Course](https://youtu.be/Mn254cnduOY) - 11+ hour video tutorial on Bloc and Flutter Bloc. In this video you will learn how to create fully fledged production-ready apps with Bloc and Firebase as your backend, by [Vandad Nahavandipoor](https://www.youtube.com/channel/UC8NpGP0AOQ0kX9ZRcohiPeQ).

### Written Resources

- [DevonFw Flutter Guide](https://github.com/devonfw-forge/devonfw4flutter) - A guide on building structured & scalable applications with Flutter and BLoC, by [Sebastian Faust](https://github.com/Fasust)

- [Using Google´s Flutter Framework for the Development of a Large-Scale Reference Application](https://epb.bibl.th-koeln.de/frontdoor/index/index/docId/1498) - Scientific paper describing how to build [a large-scale Flutter application](https://github.com/devonfw-forge/devonfw4flutter-mts-app) with BLoC, by [Sebastian Faust](https://github.com/Fasust)

### Extensions

- [Feature Scaffolding for VSCode](https://marketplace.visualstudio.com/items?itemName=KiritchoukC.flutter-clean-architecture) - A VSCode extension inspired by [Reso Coder's](https://resocoder.com) clean architecture tutorials, which helps quickly scaffold features, by [Kiritchouk Clément](https://github.com/KiritchoukC).

## Maintainers

- [Felix Angelov](https://github.com/felangel)