static async getInitialProps()

in pages/_document.tsx [7:16]


  static async getInitialProps(ctx) {
    const initialProps = await Document.getInitialProps(ctx);
    const page = ctx.renderPage((App) => (props) => (
      <StyletronProvider value={styletron}>
        <App {...props} />
      </StyletronProvider>
    ));
    const stylesheets = styletron.getStylesheets() || [];
    return { ...initialProps, page, stylesheets };
  }