1// ES6 class
2class CatComponent extends React.Component {    
3  constructor(props) {}    
4  render() {        
5    return <div>{this.props.catName} Cat, 
6      Eye Color: {this.props.eyeColor }, 
7        Age: {this.props.age}</div>    
8  }
9}
10CatComponent.defaultProps = {    
11  catName: "Sandy",    
12  eyeColor: "deepblue",    
13  age: "120"
14}

1// proptypes using class component
2Detaljer.PropTypes = {
3  detaljer: PropTypes.string.isRequired,
4  feilkode: PropTypes.string,
5  removeEvent: PropTypes.string.isRequired
6};
7
8// proptypes using function component
9Detaljer.propTypes = {
10  detaljer: PropTypes.string.isRequired,
11  feilkode: PropTypes.string,
12  removeEvent: PropTypes.string.isRequired
13};