let reducer = (state = { playing: false, time: 0 }, action) => {

  switch (action.type) {

    case 'TIME_UPDATE':

      return { playing: true, time: action.time };

​

    default:

      return state;

  }

};

​

let store = Redux.createStore(reducer);

​

let unsubscribe = store.subscribe(() => {

  console.log('state changed', store.getState());

});

​

let video = document.querySelector('video');

​

video.addEventListener('timeupdate', () => {

  store.dispatch({

    type: 'TIME_UPDATE',

    time: video.currentTime

  });

});

​

console.log('Click on play to launch the demo');