MyComponent.jsx

import * as React from 'react';
import PropTypes from 'prop-types';
import classnames from 'classnames';
import {myComponent} from './MyComponent.scss';

export const MyComponent = (props) => (
  <section className={classnames(props.className, myComponent)}>
    Hello world.
  </section>
);

MyComponent.propTypes = {
  className: PropTypes.string.isRequired 
};