React Component

How to create component in reactjs

class Car extends React.Component {
  render() {
    return <h2>Hi, I am a Car!</h2>;
  }
}

React native class component constructor

import React from 'react';  
import { View, TextInput } from "react-native";

class App extends React.Component {  
  constructor(props){  
    super(props);  
    this.state = {  
         name: "" 
      }  
    this.handleChange = this.handleChange.bind(this);  
  }
  handleChange(text){
    this.setState({ name: text })
    console.log(this.props);  
  }  
  render() {  
    return (  
    <View>
      <TextInput 
      	value={this.state.name} 
  		onChangeText={(text) =>this.handleChange(text)}
      />
    </View>  
  }  
}  
export default App;

Source: reactjs.org

Lifecycles if reactjs

class Clock extends React.Component {
  constructor(props) {
    super(props);
    this.state = {date: new Date()};
  }

  componentDidMount() {  }
  componentWillUnmount() {  }
  render() {
    return (
      <div>
        <h1>Hello, world!</h1>
        <h2>It is {this.state.date.toLocaleTimeString()}.</h2>
      </div>
    );
  }
}

Source: reactjs.org

Shouldcomponentupdate

shouldComponentUpdate(nextProps, nextState) {
  return true;
}

Source: reactjs.org

ComponentDidUpdate

componentDidUpdate(prevProps, prevState) {
  if (prevState.pokemons !== this.state.pokemons) {
    console.log('pokemons state has changed.')
  }
}

Source: dev.to

React Component

A React Component is one of the core building blocks of React Apps. In other words, we can say that every application you will develop in React will be made up of pieces called components. Components make the task of building UIs much easier

-2

Source: reactjs.org

Similar codes

-2 votes324 views1 answer
Reactjs cut part of string
Javascript React
0 vote303 views1 answer
Returned data has p tags react
Javascript React
0 vote301 views1 answer
React-native-cli remove
Javascript React
0 vote253 views1 answer
Build function component react
Javascript React
1 vote312 views2 answers
React native modal
Javascript React
29 votes286 views2 answers
React or vue
Javascript React
0 vote278 views1 answer
React router history not defined
Javascript React
0 vote304 views1 answer
Take string until react
Javascript React
-2 votes306 views1 answer
Starter react redux project
Javascript React
0 vote323 views1 answer
Text input placeholder font family react native
Javascript React