props react
class MyComponent extends React.Component{
constructor(props){
super(props);
};
render(){
return(
<div>
<h1>
My First React Component!
</h1>
</div>
);
}
};
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')
);// convert a class component to a functional component
class MyComponent extends React.Component {
state: {
name: 'Bob'
}
render() {
return (
<p>Hello, my name is {this.state.name}</p>
);
}
}
const MyComponent = () => {
const [name, setName] = React.useState('Bob');
return (<p>Hello, my name is {name}</p>);
}/* PASSING THE PROPS to the 'Greeting' component */
const expression = 'Happy';
<Greeting statement='Hello' expression={expression}/> // statement and expression are the props (ie. arguments) we are passing to Greeting component
/* USING THE PROPS in the child component */
class Greeting extends Component {
render() {
return <h1>{this.props.statement} I am feeling {this.props.expression} today!</h1>;
}
}class Welcome extends React.Component {
render() {
return <h1>Bonjour, {this.props.name}</h1>;
}
}function Welcome(props) { return <h1>Hello, {props.name}</h1>;
}
const element = <Welcome name="Sara" />;ReactDOM.render(
element,
document.getElementById('root')
);