custom PropTypes validator for Moment object

isMomentPropType.js

import moment from 'moment'; // tested using v2.24.0

// custom PropType validator per example at
// https://github.com/facebook/prop-types/blob/v15.7.2/README.md#usage
export function isMomentPropType(props, propName, componentName) {
  if (!moment.isMoment(props[propName])) {
    return new Error(
      `Invalid prop ${propName} supplied to ` +
        `${componentName} is not a Moment object. Validation failed.`
    );
  }
  return null;
}
isMomentPropType.isRequired = () => null;

isMomentPropType.test.js

// Jest test
import PropTypes from 'prop-types'; // tested using v15.7.2
import moment from 'moment'; // tested using v2.24.0

import { isMomentPropType } from './index';

// Test using example from
// // https://github.com/facebook/prop-types/blob/v15.7.2/README.md#proptypescheckproptypes
test('isMomentPropType validates valid moment object', () => {
  // define your prop validations
  const myPropTypes = {
    momentDate: isMomentPropType.isRequired,
  };

  // pass props values
  const props = {
    momentDate: moment(),
  };

  // validate
  PropTypes.checkPropTypes(myPropTypes, props, 'momentDate', 'MyComponent');
});