import App from 'next/app' function MyApp({ Component, pageProps, extraProp }) { return } // Only uncomment this method if you have blocking data requirements for // every single page in your application. This disables the ability to // perform automatic static optimization, causing every page in your app to // be server-side rendered. MyApp.getInitialProps = async (appContext) => { // calls page's `getInitialProps` and fills `appProps.pageProps` const appProps = await App.getInitialProps(appContext) return { ...appProps, extraProp: 'Hi There' } } export default MyApp