elementType.js

import React from 'react';
import { isValidElementType } from 'react-is';

import createChainableTypeChecker from './utils/createChainableTypeChecker';

function elementType(props, propName, componentName, location, propFullName) {
  const propValue = props[propName];

  if (React.isValidElement(propValue)) {
    return new Error(
      `Invalid ${location} \`${propFullName}\` of type ReactElement `
      + `supplied to \`${componentName}\`,expected an element type (a string `
      + ', component class, or function component).',
    );
  }

  if (!isValidElementType(propValue)) {
    return new Error(
      `Invalid ${location} \`${propFullName}\` of value \`${propValue}\` `
      + `supplied to \`${componentName}\`, expected an element type (a string `
      + ', component class, or function component).',
    );
  }

  return null;
}

export default createChainableTypeChecker(elementType);