functional components

1const component = () => {
2console.log("This is a functional Component");
3}

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);

1function Comment(props) {
2  return (
3    <div className="Comment">
4      <div className="UserInfo">
5        <img className="Avatar"
6          src={props.author.avatarUrl}
7          alt={props.author.name}
8        />
9        <div className="UserInfo-name">
10          {props.author.name}
11        </div>
12      </div>
13      <div className="Comment-text">
14        {props.text}
15      </div>
16      <div className="Comment-date">
17        {formatDate(props.date)}
18      </div>
19    </div>
20  );
21}

1function Welcome(props) {
2  return <h1>Hello, {props.name}</h1>;
3}

1function Welcome(props) {  return <h1>Hello, {props.name}</h1>;
2}
3
4const element = <Welcome name="Sara" />;ReactDOM.render(
5  element,
6  document.getElementById('root')
7);

1const MySubComponent = (props) => {
2    if (props.display) {
3        return <p>This text is displayed</p>
4    }
5}
6
7class MyComponent extends React.Component {
8    render() {
9        return (
10            <MySubComponent display={true} />
11        )
12    }
13}
14