Boa-core NPM | npm.io

boa-core

The core library for b-o-a.

Concepts

uni-directional
single dispatcher
action cycle

Types

type O<T> = Observable<T>;
type A<T> = { type: string; data?: T; };
type HandlerOptions = { re: (action: A<any>) => void; };
type Handler = (action$: O<A<any>>, options?: HandlerOptions) => O<A<any>>;
type run = (app: Handler) => void;

Installation

$ npm install boa-core rxjs@5.0.0-beta.6 # you can use rxjs@5.x

Usage

import { A, Handler, HandlerOptions, O, run } from 'boa-core';
import 'rxjs/add/observable/merge';
import 'rxjs/add/observable/of';
import 'rxjs/add/operator/filter';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/scan';

const app: Handler = (
  action$: O<A<any>>,
  { re }: HandlerOptions
): O<A<any>> => {
  return O.merge(
    O
    .of({ count: 1 })
    .merge(
      action$
        .filter(action => action.type === 'increment')
        .map(() => state => state.count + 1)),
      action$
        .filter(action => action.type === 'decrement')
        .map(() => state => state.count - 1))
    )
    .scan((state, updater) => updater(state))
    .map(data => ({ type: 'render', data })),
    // ...
  );
};

run(app);