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

0 vote312 views1 answer
React router history not defined
Javascript React
0 vote314 views1 answer
React navigation history clear
Javascript React
8 votes332 views1 answer
Professional react projects
Javascript React
6 votes352 views2 answers
React native disable the text input
Javascript React
0 vote328 views1 answer
Google pay payment gateway for react js project
Javascript React
0 vote352 views1 answer
React native text area align top
Javascript React
0 vote316 views1 answer
React native get navigation bar height
Javascript React
3 votes338 views1 answer
Pass element from child to parent react
Javascript React
0 vote360 views1 answer
React prevent form submission on enter key press inside inputs
Javascript React
0 vote353 views1 answer
Geocoding react
Javascript React