簡(jiǎn)介 Redux 中的 combineReducers 能讓我們很方便地把多個(gè) reducers 組合起來(lái),成為一個(gè)新的 reducer。 然而,隨著我們的應(yīng)用變得越來(lái)越復(fù)雜,combineReducers 有可能不能滿足我們的需求。正如 Redux 官方文檔所說(shuō): This helper is just a convenie...
...文章:redux源碼分析之一:createStore.jsredux源碼分析之二:combineReducers.jsredux源碼分析之三:bindActionCreators.jsredux源碼分析之四:compose.jsredux源碼分析之五:applyMiddleware combineReducers.js文件對(duì)外暴露了一個(gè)函數(shù)combineReducers,combineRed...
...x搞成支持支持多個(gè)reducer 0x002 拆封reducer import {createStore, combineReducers} from redux const ACTION_NUM1_INCREMENT = ACTION_NUM1_INCREMENT const ACTION_NUM2_INCREMENT = ACTION_NUM2_INCREMENT const nu...
...就實(shí)現(xiàn)了createStore,當(dāng)然實(shí)際上還是會(huì)稍微復(fù)雜一點(diǎn)。 7. combineReducers 從上述我們實(shí)現(xiàn)的createStore源碼可以看出,傳入的reducer只有一個(gè)。 真實(shí)的應(yīng)用中reducer是多個(gè)的,因此我們需要把reducer組合起來(lái)。combineReducers就是幫我們完成...
...候我們就需要拆分reducer。 幸好,redux提供了一個(gè)api就是combineReducers Api。 store store是redux應(yīng)用的唯一數(shù)據(jù)源,我們調(diào)用createStore Api創(chuàng)建store。 脫離react的redux案例 store,reducer基礎(chǔ)使用 第一步搭建開(kāi)發(fā)環(huán)境,這里不介紹了,參考上...
...redux,建議先去看看redux文檔 api方法 export { createStore, combineReducers, bindActionCreators, applyMiddleware, compose } 可以看到我們?cè)趓eact代碼中使用到的api,一般主動(dòng)調(diào)用的就是 combineReducers ,其他部分參照例子基本可以搬過(guò)來(lái) combineRe...
...變更 那么reducer是怎么改變state的呢?這就涉及到下面的combineReducers了 2、combineReducers 回到上面創(chuàng)建store的參數(shù)reducers, // 兩個(gè)reducer const todos = (state = INIT.todos, action) => { // .... }; const filterStatus = (state = ...
... redux簡(jiǎn)單學(xué)習(xí)(二) redux簡(jiǎn)單學(xué)習(xí)[ store, action, reducer ] 1. combineReducers combineReducers,合并多個(gè)reducer 如有下面兩個(gè)reducer,todoApp,textApp // reducers/todoApp.js export default function todoApp(state, action)...
...s.compose = exports.applyMiddleware = exports.bindActionCreators = exports.combineReducers = exports.createStore = undefined; var _createStore = __webpack_require__(2); var _createStore2 ...
...邏輯 store通過(guò)createStore()方法創(chuàng)建,接受三個(gè)參數(shù),經(jīng)過(guò)combineReducers合并的reducer和state初始狀態(tài)以及改變dispatch的中間件,后兩個(gè)參數(shù)不是必須的,store的主要作用是將action和reducer聯(lián)系起來(lái)并改變state, action action是一個(gè)對(duì)象,其...
...eateStore`方法的實(shí)現(xiàn) import createStore from ./createStore // 引入combineReducers模塊,這個(gè)模塊就是`combineReducers`方法的實(shí)現(xiàn) import combineReducers from ./combineReducers // 引入bindActionCreators模塊,這個(gè)模塊就是`bindActionCr...
...變更 那么reducer是怎么改變state的呢?這就涉及到下面的combineReducers了。 combineReducers 回到上面創(chuàng)建store的參數(shù)reducers, // 兩個(gè)reducer const todos = (state = INIT.todos, action) => { // .... }; const filterStatus = (state = I...
...Redux 的代碼量非常短小,核心只提供了 5 個(gè) API createStore combineReducers bindActionCreators applyMiddleware compose 下面先來(lái)直觀的感受下 Redux import { createStore } from redux; function counter(state = 0, action) { s...
...does not have a valid reducer. Make sure the argument passed + to combineReducers is an object whose values are reducers. ) } if (!isPlainObject(inputState)) { return ( `T...
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