React, propTypes 를 통한 prop 검증

App.js

import PropTypes from 'prop-types';

const App = ({ name = '홍길동', children }) => {
    return (
        <div>
            {name}
        </div>
    )
}

App.propTypes = {
    name: PropTypes.string.isRequired // 문자열이면서 필수 요소
}

export default App;