Runner that takes an update and a render function and runs an app (optionally takes an observable)

runner.js

import React, { Component } from 'react';
import ReactDOM from 'react-dom';
import { createStore } from 'redux';
import Rx from 'rx';

// run : (update: s -> a -> s, render: s -> Dispatcher a -> Html, observable: Observable a, root: String)
export const run = (update, render, observable, root='root') => {
  const store = createStore(update);

  const renderApp = () => {
    ReactDOM.render(
      render(store.getState(), store.dispatch),
      document.getElementById(root)
    );
  };

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

  store.subscribe(renderApp);
};