I am working with next.js and everything seems to be fine when I am using app with npm run dev.
But when I am exporting my next.js app to a static files with command npm run build and trying to open my project for part of the second the screen is unstyled, this cause verry bad user experience.
I know this is called FOUC but how to avoid it on next.js static export?
P.S I am using styled-components library, not sure if that affecting the final result.
On
If you are using styled-components, I would look into modifying your _document.js file per these instructions: https://styled-components.com/docs/advanced#server-side-rendering
That's how I managed to get out FOUC after trying a bunch of random stuff like:
<script>0</script> tag
On
For anyone facing this annoying problem using styled-component, I solved it by referring to this and this to render your styling on the server side before your page loads. Hope this helps someone end their frustration
import Document, { Html, Head, Main, NextScript, DocumentContext } from 'next/document';
import { ServerStyleSheet } from 'styled-components';
export default class MyDocument extends Document {
static async getInitialProps(ctx: DocumentContext) {
const sheet = new ServerStyleSheet();
const originalRenderPage = ctx.renderPage;
try {
ctx.renderPage = () =>
originalRenderPage({
enhanceApp: (App) => (props) => sheet.collectStyles(<App {...props} />),
});
const initialProps = await Document.getInitialProps(ctx);
return {
...initialProps,
styles: [initialProps.styles, sheet.getStyleElement()],
};
} finally {
sheet.seal();
}
}
render() {
return (
<Html lang="en">
<Head />
<body>
<Main />
<NextScript />
</body>
</Html>
);
}
}
Long shot that this is a fix for anyone else, but I saw this behavior when I mistakenly wrapped the entire page contents inside the head tag. Heh, oops.
So don't override Document with something like this like I did, make sure to close that head tag sooner: