functional component react jS code example

Example 1: create react component class

class MyComponent extends React.Component{
    constructor(props){
        super(props);
    };
    render(){
        return(
            

              

              	My First React Component!
              
            
        );
    }
};

Example 2: functional component react

function Welcome(props) {
  return 
Hello, {props.name}
;
}

function App() {
  return (
    

                      
  );
}

ReactDOM.render(
  ,
  document.getElementById('root')
);

Example 3: create functional component react

import React from 'react'; const App = () => {  const greeting = 'Hello Function Component!';   return ;}; const Headline = ({ value }) =>  
{value}
; export default App;

Example 4: react class component

class Welcome extends React.Component {
  render() {
    return 
Bonjour, {this.props.name}
;
  }
}

Example 5: react function component

function Welcome(props) {
  return 
Hello, {props.name}
;
}

Example 6: class to functional component react

// convert a class component to a functional component
class MyComponent extends React.Component {
	state: { 
      name: 'Bob' 
    }
	render() {
      return (
        
Hello, my name is {this.state.name}
      );
    }
}

const MyComponent = () => {
  const [name, setName] = React.useState('Bob');
  return (
Hello, my name is {name}
);
}