CREATION OF REACT PROJECT
	>npx create-react-app name-of-the-app

GET REACT VERSION
	> npm view react version

COMPILATE AND RUN  THE PROJECT
	>npm start
	if we want to run it in https :
	> ($env:HTTPS = "true") -and (npm start)
	
COMPONENTS
	>Soit par class
		> class myComponentName extends React.Component{
			constructor(props){
				super(props);
				this.state={
					  value:null,
				};
			 }
			render(){
				return <button className='nomDuneClasse' onClick={() => this.props.onClick()}>{this.props.value}</button>
			}
		}
	>Soit par fonction
		>function Square(props) {
		  return (
			<button className="nomDuneClasse" onClick={props.onClick}>
			  {props.value}
			</button>
		  );
		}