react class component

1class MyComponent extends React.Component{
2    constructor(props){
3        super(props);
4    };
5    render(){
6        return(
7            <div>
8              <h1>
9              	My First React Component!
10              </h1>
11            </div>
12        );
13    }
14};
15

1class Welcome extends React.Component {
2  render() {
3    return <h1>Hello, {this.props.name}</h1>;
4  }
5}

1function Welcome(props) {
2  return <h1>Hello, {props.name}</h1>;
3}
4
5function App() {
6  return (
7    <div>
8      <Welcome name="Sara" />      <Welcome name="Cahal" />      <Welcome name="Edite" />    </div>
9  );
10}
11
12ReactDOM.render(
13  <App />,
14  document.getElementById('root')
15);

1class Clock extends React.Component {
2  constructor(props) {
3    super(props);
4    this.state = {date: new Date()};
5  }
6
7  componentDidMount() {  }
8  componentWillUnmount() {  }
9  render() {
10    return (
11      <div>
12        <h1>Hello, world!</h1>
13        <h2>It is {this.state.date.toLocaleTimeString()}.</h2>
14      </div>
15    );
16  }
17}

1import React from 'react'; const App = () => {  const greeting = 'Hello Function Component!';   return <Headline value={greeting} />;}; const Headline = ({ value }) =>  <h1>{value}</h1>; export default App;

1class Welcome extends React.Component {
2  render() {
3    return <h1>Bonjour, {this.props.name}</h1>;
4  }
5}