console 命令行工具 X clear

console

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

const render = () => {
  document.body.innerText = store.getState();
}

store.subscribe(render);

render();
document.addEventListener(‘click’, () => {
  store.dispatch({ type : 'INCREMENT' })
})

<title> test </title>
  <script src="http://cdn.bootcss.com/redux/3.6.0/redux.js"></script>