redux工具包

Redux工具包 纯Redux const INCREMENT = 'INCREMENT' const DECREMENT = 'DECREMENT' function increment ( ) { return { type : INCREMENT } } function decrement ( ) { return { type : DECREMENT } } function counter ( state = 0 , action ) { switch ( action . type ) { case INCREMENT : return state + 1 case DECREMENT : return state - 1 default : return state } } const store