function App({ Component, pageProps }) { return } if (typeof window !== 'undefined') { window.uncaughtErrors = [] window.addEventListener('error', (err) => { window.uncaughtErrors.push(err) }) window.addEventListener('unhandledrejection', (err) => { window.uncaughtErrors.push(err) }) } App.getInitialProps = async ({ Component, ctx }) => { const props = {} if (Component.getInitialProps) { props.initialProps = await Component.getInitialProps(ctx) } return props } export default App