Redux01 续集

subscribe()

import { createStore } from "redux"/*新建stoore*通过reducer 建立*根据老的状态和action,生成新的state   */function counter (state=0,action){    switch(action.type){        case "加机关枪":            return state + 1        case "减机关枪":            return state - 1        case "抢机关枪":            return state * 1000        default:        return 10    }}const  store =  createStore(counter)/*新建store 结束*/const init = store.getState()console.log(init)function listener(){    const cur = store.getState()    console.log(`现在有机枪  ${cur}把`)}store.subscribe(listener)/*  派发事件 传递action    */store.dispatch({type: "加机关枪"})store.dispatch({type: "加机关枪"})store.dispatch({type: "减机关枪"})store.dispatch({type: "抢机关枪"})