NextJS Deno - Error when trying internalization

Question

Has anyone ever encountered when trying to use internalization in deno with NextJS the following error?

Error: Attempt to export a nullable value for "File" at eventLoopTick (ext:core/01_core.js:177:7)

I am using the app router architecture and placed the necessary files (page, layout, components, ...) inside the [lang] directory, which to my experience and knowledge is how it works in a NodeJS environment. This is the first time I encountered this issue, but it is also my first time using Deno.

So far I have not found a way to solve this issue... yet. Advice is always welcome!

Cairn Terrier · Answer

Update: To my understanding... this has to do with NextJS Edge Runtime not being able to either find/open my [lang] director.y. Still not certain what I am doing wrong.My folder structure:- src
-- app
--- [lang]
---- page.tsx
---- layout.tsx
---- ... other files ...
--- dictionaries
--- favicon.ico
-- middleware.ts
- next.config.ts
- ... other files ...Middleware.ts contents:import { NextRequest, NextResponse } from "next/server";

const locales = [ "nl", "en", "fr", "de" ];

function getLocale( request: NextRequest ) {
    const lang: string = "";

request.headers.get( "accept-language" )?.split( ',' ).forEach( ( lang ) => {
        const [ locale ] = lang.split( ';' );
        if ( locales.includes( locale ) ) lang = locale;
    } );

return lang || "nl";
}

export function middleware( request: NextRequest ) {
    const { pathname } = request.nextUrl;
    
    const pathnameHasLocale = locales.some( ( locale ) => pathname.startsWith( `/${ locale }/` ) || pathname ===  `/${ locale }` );
    
    if ( pathnameHasLocale ) {
        return;
    } else {
        const locale = getLocale( request );
        request.nextUrl.pathname = `/${ locale }/${ pathname }`;
        return NextResponse.redirect( request.nextUrl );
    }
}

export const config = {
    matcher: [
        // Skip paths for api, _next, favicon, sitemap, and robots.txt
        "/((?!api|_next/static|_next/image|favicon.ico|sitemap.xml|robots.txt).*)",
    ]
};

NextJS Deno - Error when trying internalization

1 Reply