react中对于redux的封装

最新推荐文章于 2024-03-29 16:47:35 发布

转载最新推荐文章于 2024-03-29 16:47:35 发布 · 232 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/Leslie-Cheung1584304774/p/10734672.html

文章标签：

#javascript #ViewUI

本文深入解析了Redux的创建过程，包括store的初始化、action的分发机制、state的更新及订阅事件的处理。同时，详细介绍了combineReducers函数的实现方式，帮助读者理解如何将多个reducer合并成一个总reducer。

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const createStore = (reducer)=>{
    //默认的state对象
    let state = {};

    //将所有订阅的事件存在在这个数组中
    let listeners = [];

    //默认的action
    let actionTypes = "@@redux/INIT";
    let Initaction = {
        type:actionTypes
    }

    const dispatch = (action=Initaction)=>{
        state = reducer(state,action);
        listeners.map(cb=>{
            cb();
        })
    }
    dispatch();

    const getState = ()=>state;

    const subscribe = (cb)=>{
        listeners.push(cb);
    }


    return {
        dispatch,
        getState,
        subscribe
    }
}

const combineReducers = (reducers)=>{

    const newState = {};

    return function(state,action){
        for(let key in reducers){
            let reduce = reducers[key];
            
            console.log(newState[key])
            newState[key] = reduce(state[key],action);
        }
        return newState;
    }
}



export {createStore,combineReducers}