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Angular Components that make it easy to implement the BLoC Design Pattern (Business Logic Component). Built to be used with the bloc package.

Angular Bloc Package

Build Status codecov Pub License: MIT Gitter


An Angular package that helps implement the Bloc pattern.

This package is built to work with bloc ^0.6.0.

Angular Components #

BlocPipe is an Angular pipe which helps bind Bloc state changes to the presentation layer. BlocPipe handles rendering the html element in response to new states. BlocPipe is very similar to AsyncPipe but has a more simple API to reduce the amount of boilerplate code needed.

Usage #

Lets take a look at how to use BlocPipe to hook up a CounterPage html template to a CounterBloc.

counter_page_component.html

<div class="counter-page-container">
    <h1>Counter App</h1>
    <h2>Current Count: {{ counterBloc | bloc }}</h2>
    <material-fab class="counter-fab-button" (trigger)="increment()">+</material-fab>
    <material-fab class="counter-fab-button" (trigger)="decrement()">-</material-fab>
</div>

counter_page_component.dart

import 'package:angular/angular.dart';
import 'package:angular_components/angular_components.dart';

import 'package:angular_bloc/angular_bloc.dart';

import './counter_bloc.dart';

@Component(
  selector: 'counter-page',
  templateUrl: 'counter_page_component.html',
  styleUrls: ['counter_page_component.css'],
  directives: [MaterialFabComponent],
  pipes: [BlocPipe],
)
class CounterPageComponent implements OnInit, OnDestroy {
  CounterBloc counterBloc;

  @override
  void ngOnInit() {
    counterBloc = CounterBloc();
  }

  @override
  void ngOnDestroy() {
    counterBloc.dispose();
  }

  void increment() {
    counterBloc.dispatch(Increment());
  }

  void decrement() {
    counterBloc.dispatch(Decrement());
  }
}

At this point we have sucessfully separated our presentational layer from our business logic layer. Notice that the CounterPage component knows nothing about what happens when a user taps the button. The component simply tells the CounterBloc that the user has pressed the increment/decrement button.

Dart Versions #

  • Dart 2: >= 2.0.0

Examples #

  • Simple Counter Example - a complete example of how to create a CounterBloc and hook it up to an AngularDart app.
  • Github Search - an example of how to create a Github Search Application using the bloc and angular_bloc packages.

Contributors #

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Publisher

verified publisherbloclibrary.dev

Angular Components that make it easy to implement the BLoC Design Pattern (Business Logic Component). Built to be used with the bloc package.

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License

unknown (license)

Dependencies

angular, bloc, rxdart

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