How to write the code for React event listening

This article mainly introduces the relevant knowledge of "how to write the code for React event monitoring". The editor shows you the operation process through the actual case. The operation method is simple, fast and practical. I hope this article "how to write the code for React event monitoring" can help you solve the problem.

Method 1: use bind binding in constructor to change the direction of this. The code is as follows:

Import React, {Component} from 'react';export default class Group extends Component {constructor (props) {super (props); this.state = {show: true, title:' big watermelon'}; / / Writing method 1: event binding changes this to this.showFunc = this.showFunc.bind (this);} / / call the method showFunc () {this.setState ({show: watermelon}) } render () {let result = this.state.show? This.state.title: null; return (trigger {result});}}

Method 2: change the this direction through the arrow function, the code is as follows:

Import React, {Component} from 'react';export default class Group extends Component {constructor (props) {super (props); this.state = {show: true, title:' big watermelon'};} / / second, change this to point to showFunc = () > {this.setState ({show: false});}; render () {let result = this.state.show? This.state.title: null; return (trigger {result});}}

Method 3: directly use the arrow function to change the direction of the this, the code is as follows:

Import React, {Component} from 'react';export default class Group extends Component {constructor (props) {super (props); this.state = {show: true, title:' big watermelon'};} / / call the method showFunc () {this.setState ({show: false});} render () {let result = this.state.show? This.state.title: null; return (this.showFunc ()} > trigger {result});}} that's all for "how to write code for React event listening". Thank you for reading. If you want to know more about the industry, you can follow the industry information channel. The editor will update different knowledge points for you every day.