Duffer Derek

// This module is based on https://github.com/airbnb/prop-types-exact repository.
// However, in order to reduce the number of dependencies and to remove some extra safe checks
// the module was forked.

const specialProperty = 'exact-prop: \u200b';
export default function exactProp(propTypes) {
  if (process.env.NODE_ENV === 'production') {
    return propTypes;
  }
  return {
    ...propTypes,
    [specialProperty]: props => {
      const unsupportedProps = Object.keys(props).filter(prop => !propTypes.hasOwnProperty(prop));
      if (unsupportedProps.length > 0) {
        return new Error(`The following props are not supported: ${unsupportedProps.map(prop => `\`${prop}\``).join(', ')}. Please remove them.`);
      }
      return null;
    }
  };
}