@material-ui/core/es/utils/exactProp.js

React components that implement Google's Material Design.

import _objectSpread from "@babel/runtime/helpers/objectSpread";
// 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.
// Only exported for test purposes.
export const specialProperty = 'exact-prop: \u200b';

function exactProp(propTypes) {
  /* istanbul ignore if */
  if (process.env.NODE_ENV === 'production') {
    return propTypes;
  }

  return _objectSpread({}, propTypes, {
    // eslint-disable-next-line prefer-arrow-callback
    [specialProperty]: props => {
      const unsupportedProps = Object.keys(props).filter(prop => !propTypes.hasOwnProperty(prop));

      if (unsupportedProps.length > 0) {
        return new Error(`The following properties are not supported: ${unsupportedProps.map(prop => `\`${prop}\``).join(', ')}. Please remove them.`);
      }

      return null;
    }
  });
}

export default exactProp;