In dev mode, I have separate Custom CSS files for different layouts which work fine. However, when I publish my app in production mode, Nextjs combines all the CSS files together causing issues with my layouts.
In dev mode, I have separate Custom CSS files for different layouts which work fine. However, when I publish my app in production mode, Nextjs combines all the CSS files together causing issues with my layouts.
Typically, following the build process, we move all CSS and JS chunks to a designated static folder. This enables Next Js to serve the requested page from the static folder when queried by the server (based on the request).
Server.js:
const staticDir = path.resolve(__dirname, "..", ".next/static");
server.use(compression());
server.use("/_next/static", express.static(staticDir));
server.get("/_next/*", (req, res) => {
/* serving _next static content using next.js handler */
handle(req, res);
});
server.get("/static/*", (req, res) => {
/* serving _next static content using next.js handler */
handle(req, res);
});
Add the following lines in your _document.js file and provide details of the configuration added in next.config.js.
_document.js
// Render app and page and get the context of the page with collected side effects.
const sheets = new ServerStyleSheets();
const originalRenderPage = ctx.renderPage;
ctx.renderPage = () =>
originalRenderPage({
enhanceApp: App => props => sheets.collect(<App {...props} />)
});
const initialProps = await Document.getInitialProps(ctx);
return {
...initialProps,
// Styles fragment is rendered after the app and page rendering finish.
styles: [
...React.Children.toArray(initialProps.styles),
sheets.getStyleElement()
]
};
};
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