React Components Variations of Stateless Functional Components
Example
const languages = [
'JavaScript',
'Python',
'Java',
'Elm',
'TypeScript',
'C#',
'F#'
]
// 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}) => {
<ul>
{languages.map(language => <Language language={language} />)}
</ul>
}
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 = languages.map(language => language.toUpperCase())
return (
<fieldset>
<legend>{header}</legend>
<LanguagesList languages={formattedLanguages} />
</fieldset>
)
}
LanguageSection.PropTypes = {
header: React.PropTypes.string.isRequired,
languages: React.PropTypes.array.isRequired
}
ReactDOM.render(
<LanguageSection
header="Languages"
languages={languages} />,
document.getElementById('app')
)
Here you can find working example of it.
