{title ? `${title} - ${siteName}` : siteName}

import * as React from 'react'; import Head from 'next/head'; import Meta from './meta-context'; export type Props = { title?: string; }; const PageTitle = ({ title }: Props) => ( {({ siteName }: { siteName: string }) => ( {title ? `${title} - ${siteName}` : siteName} )} ); export default PageTitle;