redux.example1.js

const counter = ( state = 0, action ) => {
  switch( action.type ){
    case 'INCREMENT':
      return state + 1 ;
    case 'DECREMENT':
      return state - 1 ;
    default:
      return state;
      
  }
};
const Counter = ({
  value,
  onIncrement,
  onDecrement
}) => (
  <div>
    <h1>{value}</h1>
    <button onClick={onIncrement}>+</button>
    <button onClick={onDecrement}>-</button>
  </div>
);

const { createStore } = Redux;
const store = createStore( counter );

const render = () =>{
  ReactDOM.render(
    <Counter 
     value={ store.getState() }
     onIncrement={ () => 
        store.dispatch({
                  type:'INCREMENT'
        })
     }
     onDecrement={ ()=>
        store.dispatch({
                  type:'DECREMENT'
        })
     }
     />,
    document.getElementById('root')
  );
}


store.subscribe( render );
render();

babel
redux

using in jsbin