// view.tsx
export type ViewProps = {
  number: number,
  inc: () => void,
  dec: () => void
};

const View = (props: ViewProps) => (
    <div>
      {props.number}
      <button onClick={props.inc}>+</button>
      <button onClick={props.dec}>-</button>
    </div>
);

export default View;

// store.ts
import { createStore } from 'react-rxjs';
import { merge, Subject, Observable } from "rxjs";
import { map } from "rxjs/operators";

export const inc$ = new Subject<void>();
export const dec$ = new Subject<void>();

const reducer$: Observable<(state: number) => number> = merge(
    inc$.pipe(map(() => (state: number) => state + 1)),
    dec$.pipe(map(() => (state: number) => state - 1))
);

const store$ = createStore("example", reducer$, 0);

export default store$;

// container.ts
import { connect } from 'react-rxjs';
import store$, { inc$, dec$ } from './store';
import View, { ViewProps } from './view';

const mapStateToProps = (storeState: number): ViewProps => ({
    number: storeState,
    inc: () => inc$.next(),
    dec: () => dec$.next(),
});

export default connect(store$, mapStateToProps)(View);