Use raw operations react-redux

This time I will bring you what are the precautions for using raw operation react-redux. The following is a practical case, let's take a look.

Implement a react-redux by myself

I have tried to implement a redux by myself before. This blog mainly records the process of implementing a react-redux by myself.

This react-redux still has a few minor flaws. I implemented it using a counter as an example.

This is the directory structure:

The connect.js file here is react-redux.

├─component
│   connect.js
│   counter.js
│
└─store
    index.js

index.js：

import React from "react";
import ReactDom,{render} from "react-dom";
import Couter from "./component/counter";
import {Provider} from "./component/connect" import store from "./store/index"  ReactDom.render(,document.getElementById("root"));

./store/index.js:

import {createStore} from "redux";
function reducer(state={number:0},action) {
  switch (action.type){
    case "add":
      return {number:state.number+action.count}
    default:
      return state;
  }
}
export default createStore(reducer);

./component/connect.js:

import React from "react";
import PropTypes from "prop-types";
//Provider是一个组件 接受一个store属性 将其内容挂载在上下文context //这样后代才可以都有办法拿到 class Provider extends React.Component{
  static childContextTypes={
    //设置上下文的类型是对象
 store:PropTypes.object
 }
  getChildContext(){
    //获取并设置后代上下文的内容
 return {store:this.props.store}
  }
  render(){
    return this.props.children
 }
}
let connect=(mapStateToProps,mapDispatchToProps)=>(comp)=>{
  return class Proxy extends React.Component{
    static contextTypes={
      store:PropTypes.object
 }
    constructor(props,context){
      super(props);
      //将参数mapStateToProps 的解构赋值 代理组件的状态
 this.setState=mapStateToProps(context.store.getState())
    }
    componentDidMount(){
      this.context.store.subscribe(()=>{
        this.setState(mapStateToProps(this.context.store.getState()))
      })
    }
    render(){
      return 
    }
  }
}
export {Provider,connect}

./ component/counter.js:

import React from "react";
import {connect} from "./connect";
export default class Counter extends React.Component{
  constructor(props){
    super(props);
  }
  render(){
    return (
      

        {
          this.props.add(5);
        }}>+
        {this.props.n}
      
    )
  }
}
let mapStateToProps=(state)=>{
  return {n:state.number}
};
let mapDispatchToProps=(dispatch)=>{
  return {
    add:(count)=>{
      dispatch({type:"add",count:count})
    }
  }
}
export default connect(mapStateToProps,mapDispatchToProps)(Counter)

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!

Recommended reading:

Detailed explanation of the steps to import and use the vue-cli component

How to obtain WeChat authorization and log in to vue

The above is the detailed content of Use raw operations react-redux. For more information, please follow other related articles on the PHP Chinese website!