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React Variations of Stateless Functional Components

const languages = [
// one liner
const Language = ({language}) => <li>{language}</li>
Language.propTypes = {
 message: React.PropTypes.string.isRequired
* If there are more than one line.
* Please notice that round brackets are optional here,
* However it's better to use them for readability
const LanguagesList = ({languages}) => {
 { => <Language language={language} />)}
LanguagesList.PropTypes = {
 languages: React.PropTypes.array.isRequired
 * This syntax is used if there are more work beside just JSX presentation
 * For instance some data manipulations needs to be done.
 * Please notice that round brackets after return are required,
 * Otherwise return will return nothing (undefined)
const LanguageSection = ({header, languages}) => {
 // do some work
 const formattedLanguages = => language.toUpperCase())
 return (
 <LanguagesList languages={formattedLanguages} />
LanguageSection.PropTypes = {
 header: React.PropTypes.string.isRequired,
 languages: React.PropTypes.array.isRequired
 languages={languages} />,


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