Why doesn't the storage state change?

Question

JavaScript

I have a simple SPA - two buttons and text. There is a repository that for some reason does not change its state. I do not understand why.
Here is the code - everything is trivial. You can run: here code

import React from 'react';
import { render } from 'react-dom';
import { createStore } from 'redux'

// REDUX reducer
const counter = (state = 0, action) => {
  switch (action.type) {
    case 'INCREMENT':
      return state + 1
    case 'DECREMENT':
      return state - 1
    default:
      return state
  }
}

// Create REDUX store. 
// In arguments we need to give reducer
const store = createStore(counter)

// TODO: use this component to view text on a screen
const Counter = ({
  value,
  onInc,
  onDec
}) => (
  <div>
    <h1>{value}</h1>
    <button onClick={onInc}>+</button>
    <button onClick={onDec}>-</button>
  </div>
)

class App extends React.Component {
  render() {
    return (
      <div>
        <Counter
        value={store.getState()}
        onInc={() => store.dispatch(
          {type: 'INCREMENT'})
        }
        onDec={() => store.dispatch({
          type: 'DECREMENT'
        })}
        />
      </div>
    )
  }
}


render(<App />, document.getElementById('root'));

Answer 1

You forgot store.subscribe
Compare with the example here