How do I get the props in this ES6 Class?

Question

I tried using constructor (props) but still getting cant find variable: props Hot do I get the props in this:

    export default class DetailScreen extends React.Component {
  state = {
    value: '399',
    checked: 'Pan Crust',
  };

  render() {
    const productId = props.navigation.getParam('productId');
    constselectedProduct = useSelector((state) =>
      this.state.products.vegProducts.find((prod) => prod.id === productId),
    );

    const {checked} = this.state;

Answer 1

props are accessed with this in class components.

So, the first line in the render function should be

const productId = this.props.navigation.getParam('productId');

Update For react navigation 5.x

You should be able to access route params like this

const productId = this.props.route.params.productId;

Hooks should be used in functional components. You should refactor your code to look like this instead

export const DetailScreen = ({route)} => {
const [value, setValue] = useState('399');
const [checked, setChecked] = useState('Pan Crust');
const productId = route.params.productId;

return (
   // return view here
 )
}