Runner Generator (useful to generate different runners depending on the platform)

makeRunner.js

// makeRunner : (renderer : ReactComponent -> ()) 
//           -> (update : s -> a -> s, render : s -> Dispatcher a -> ReactComponent, observable : Observable a)
//           -> ()
export const makeRunner = (renderer) => (update, render, observable) => {
  const store = createStore(update);

  const renderApp = () => renderer(render(store.getState(), store.dispatch));

  renderApp();

  if (observable) {
    observable.subscribe(store.dispatch);
  }

  store.subscribe(renderApp);
};