React - Redux架构设计融合

Z时代
2024-01-10
分类：综合

react

在学习react的路上不断前行，遇到了各式各样的框架及架构，但整体是要做一个兼容性及性能非常好的项目并非易事，在react中，出现了redux生态圈，得以将react这匹黑马驾驭得更好，此文将演示redux生态在实际项目运用。

整备

网络：axios
一个基于`promise`实现的网络请求库,功能齐全,库精简
融合：redux-actions
解放`switch`,代码更简洁
性能：redux-ignore、reselect
优化`reduce`与渲染
数据流：redux-observable
可将复杂的业务逻辑异步化
持久化：redux-persist
将整个`store`树持久化,解放各类保存数据
界面：material-ui
在追过艺术道路上的`UI`布道者

结构

. ├── package-lock.json ├── package.json ├── public │ ├── favicon.ico │ ├── ico │ │ ├── favicon.icns │ │ ├── favicon.ico │ │ └── favicon.png │ └── index.html ├── src │ ├── components │ │ └── app.js │ ├── config.json │ ├── epics │ │ ├── app.js │ │ └── index.js │ ├── index.js │ ├── middles │ │ ├── index.js │ │ ├── log.js │ │ └── warn.js │ ├── reducers │ │ ├── app.js │ │ └── index.js │ ├── rx │ │ └── extends.js │ ├── selectors │ │ └── counter.js │ └── store │ └── persistor.js └── yarn.lock

目录	说明
src/components	存放页面组件
epics	异步请求或逻辑
middles	各类中间件
reducers	redux core
rx	rxjs 扩展方法
selectors	渲染缓存或多redux共享数据
store	整合专用

项目会从src/index.js入口开始加载

redux的store也是从这里开始初始化

src/store/persistor.js
这里的persistor我们配置非常简单,因为我们把一些配置交给了reducers,middles,epics的index.js去自动配置了

import {composeWithDevTools} from 'redux-devtools-extension';
# 1. 这里使用引入redux-devtools开发者工具，用于观察action与state树的信息
const epicMiddleware = createEpicMiddleware();
# 2. 实例化一个epic异常流框架
const rootEpic = combineEpics(
    ...epics
);
# 3. 接着把我们`src/epics`目录下的所有组件组合起来
let store = createStore(
        persistedReducer,
        preloadedState,
        comp(applyMiddleware(epicMiddleware, ...middles))
    );
# 4. redux的store初始化,包括各类中间件
epicMiddleware.run(rootEpic);
# 5. 别忘了运行异常流处理(之前版本不用手动流行,新版本必需)

src/reducers/index.js

import {enableBatching} from 'redux-batched-actions';
# 这里引入批actions,可以同时发送多个action,实际业务中会用到很多
import {combineReducers} from "redux";
import appReducer from "./app";
export default enableBatching(combineReducers({
    ...appReducer,
}));

src/reducers/app.js

import {createActions, handleActions} from 'redux-actions';
# 去除switch，简洁我们的代码，注重代码可视化
import {filterActions} from 'redux-ignore';
# 增加性能,属于自己的功能自己的处理
export const actions = createActions({
    changeText: (text) => ({text}),
    searchSuccess: (data) => ({data}),
    searchFailed: (error) => ({error}),
});
export const types = {
    changeText: 'changeText',
    search: 'search',
    searchSuccess: 'searchSuccess',
    searchFailed: 'searchFailed',
};
const defaultState = {
    name: '',
    searching: false,
    list: []
};
const reducer = handleActions({
    changeText: (state, action) => ({...state, searching: true, name: action.payload.text}),
    searchSuccess: function (state, action) {
        return {...state, list: action.payload.data.items, searching: false};
    },
    searchFailed: function (state, action) {
        return {...state, searching: false};
    },
}, defaultState);
export default {
    app: filterActions(reducer, Object.keys(actions))
};

src/epics/app.js

import 'rxjs/Rx';
import '../rx/extends';
import axios from 'axios';
import {Observable} from 'rxjs/Rx';
import {types, actions} from "../reducers/app";
export const apis = {
    searchApi:(name)=>axios.get(`https://api.github.com/search/users?q=${name}`)
};
const search = action$ =>
    action$.ofType(types.changeText)
        .debounceTime(1000) //去抖动
        .switchMap(action => Observable.fromPromise(apis.searchApi(action.payload.text)))
        .retryWithDelay(3, 2000)//网络重试
        .map(response => actions.searchSuccess(response.data))
        .catch(error => Observable.of(actions.searchFailed(error)));
export default [search];

src/middles/index.js

import {batchDispatchMiddleware} from 'redux-batched-actions';
import warn from './warn';
import log from './log';
# 可以引入自己的开发中间件
export default [
    batchDispatchMiddleware,
    warn,
    log
]

src/selectors/counter.js

import {createSelector} from 'reselect';
# 可以用于共享多个redux的数据,在components组件中引入即可,带缓存功能,增加渲染性能
const todosSelector = (state, props) => state.yeah;
# 所有带计算功能的这将放入这里
const fSelector = createSelector(
    [todosSelector],
    (todos) => {
        return {
            count:Math.abs(1,2),//这里简单列出个别函数,一般用于大量判断条件,比对，复制类的
            ...todos
        }
    }
);
export default fSelector;