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Today, the editor will share with you the relevant knowledge points about how to achieve react communication. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

React communication methods include: 1, using props for parent-child component communication; 2, using callback function for child parent component communication; 3, using variable promotion for sibling component communication; 4, using Context for cross-component communication; 5, using node events module for singleton communication; 6, using redux to share data communication.

The operating environment of this tutorial: Windows7 system, react17.0.1 version, Dell G3 computer.

Six Communication modes of React

1.props father-son communication

two。 Callback function, child-parent communication

3. Variable promotion, sibling component communication

4.Context, cross-component communication

Singleton Communication of events Module of 5.node

6.redux shared data communication

1.props father-son communication

Function Children (props) {return (

Children

{props.text}

)} function Parent () {return (

Parent

)} export default Parent

two。 Callback function, child-parent communication

Function Children (props) {return (

Children

{props.text}

{props.handleChange ('changed')}} > Click me to change what my father passed on to me)} function Parent () {let [text, setText] = useState ('this is what Dad passed to you') function handleChange (val) {setText (val)} return (

Parent

)} export default Parent

3. Variable improvement, brothers set up correspondence

Function Children (props) {return (

Children

{props.setText ('I am a message from Children')} > send a message to Children1)} function Children1 (props) {return (

Children1

{props.text}

)} function App () {let [text, setText] = useState ('') return (APP)} export default App

4.Context, cross-organizational communication

Old writing method

Class Children extends React.Component {static contextTypes = {text: PropsType.string} render () {return (

Children

{this.context.text}

)} class Parent extends React.Component {static childContextTypes = {text: PropsType.string} getChildContext () {return {text:'I'm the father's message'}} render () {return (

Parent

)} export default Parent

New writing method

Const {Consumer, Provider} = React.createContext () class Children extends React.Component {render () {return ({(value) = > (

Children1

{value.text}

)} class Parent extends React.Component {render () {return (

Parent

)} export default Parent

Singleton Communication of events Module of 5.node

Function Children (props) {return (

Children

{props.text}

{props.event.emit ('foo')}} > Click me to change what my father passed to me)} function Parent () {let [text, setText] = useState (' this is what Dad passed to you') let event = new Events () event.on ('foo', () = > {setText (' changed'}) return (

Parent

)} export default Parent

Note ⚠️: this communication remembers to introduce the events module at the top, without installation, node its own module.

6.redux shared data communication

Store.js

Import {createStore} from 'redux'let defaultState = {text:' I am store'} let reducer = (state = defaultState, action) = > {switch (action) {default: return state}} export default createStore (reducer)

Child.js

Import React from 'react'import {connect} from' react-redux'class Child extends React.Component {render () {return (Child)

{this.props.text}

)} let mapStataToProps = (state) = > {return {text: state.text}} export default connect (mapStataToProps, null) (Child)

Parent.js

Class Parent extends React.Component {render () {return (

Parent

)} export default Parent

Note: remember to install redux and react-redux.

These are all the contents of this article entitled "how to achieve react Communication". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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