版权声明: https://blog.csdn.net/weixin_33768153/article/details/82985073
上一节实现了一个简单的immutable和react-redux的应用,在这一节,实现一个简单的处理合并redux-immutable的combineReducers方法
index.js组件代码修改
import { createStore } from "redux";
// import {combineReducers} from 'redux-immutable' // 这里注释掉,自己手动实现
let immutable = require('immutable')
let { Map } = immutable
let initState = Map({number: 0})
function counter(state = initState, action) {
switch (action.type) {
case 'ADD':
let newstate = state.update('number', val => val + action.payload)
return newstate
default:
return state
}
}
// 自己实现combineReducers
// 1.返回一个function,这个函数有两个属性,一个state, action
// 2.创建一个新的state
// 3.遍历所有的reducers,然后设置给我们自己创建的state对象
// 4.返回自己创建的state对象
function combineReducers(reducers) {
return function (state = Map({}), action) {
let newState = Map({})
for (let key in reducers) {
newState = newState.set(key, reducers[key](state.get(key), action))
}
return newState
}
}
// 合并reducers对象
let reducers = combineReducers({
counter
})
// 拿到创建后的store
let store =createStore(reducers)
export default store
总结
通过以上简单的一个小方法,就实现了redux-immutable的combineReducers方法,嗯么么,到此结束,告辞