what are functional components in react code example

Example 1: class in react

class App extends Component {
    constructor() {
        super()
        this.state = {
            name: "Sally",
            age: 13
        }
    }
    
    render() {
        return (
            <div>
                <h1>{this.state.name}</h1>
                <h3>{this.state.age} years old</h3>
            </div>
        )    
    }
}

Example 2: class app extends component syntax

class Welcome extends React.Component {
  render() {
    return <h1>Hello, {this.props.name}</h1>;
  }
}

Example 3: functional component react

function Welcome(props) {
  return <h1>Hello, {props.name}</h1>;
}

function App() {
  return (
    <div>
      <Welcome name="Sara" />      <Welcome name="Cahal" />      <Welcome name="Edite" />    </div>
  );
}

ReactDOM.render(
  <App />,
  document.getElementById('root')
);

Example 4: react functional components

const component = () => {
console.log("This is a functional Component");
}

Example 5: create functional component react

import React from 'react'; const App = () => {  const greeting = 'Hello Function Component!';   return <Headline value={greeting} />;}; const Headline = ({ value }) =>  <h1>{value}</h1>; export default App;

Example 6: functional components

function Welcome(props) {  return <h1>Hello, {props.name}</h1>;
}

const element = <Welcome name="Sara" />;ReactDOM.render(
  element,
  document.getElementById('root')
);