After I deploy my Next.js code to Vercel, including Google Analytics added by @next/third-parties, I am encountering an error that does not appear in development mode

Question

After I deploy my Next.js code to Vercel, including Google Analytics added by @next/third-parties, I am encountering an error that does not appear in development mode

Lately, I completed a next.js project and integrated Google Analytics using @next/third-parties/google. During development, everything worked perfectly, but upon deploying it to vercel.com, an error popped up.

     ` ./app/layout.tsx:34:24
      Type error: The type 'string | undefined' cannot be assigned to 
      type 'string'.
      'undefined' is not compatible with 'string'.
      </NextAuthProvider>
   </body>
   <GoogleAnalytics gaId={process.env.NEXT_PUBLIC_GOOGLE_ANALYTICS} />
                    ^
  </html>
);
}
  Error: Command "npx prisma generate && next build" exited with 
  1``your text

typescript next.js typescript-typings google-analytics-4

Answer 1

Answer №1

During runtime, TypeScript type checking is not in effect, so nothing will break unless the GoogleAnalytics component fails to work if the gaId parameter is undefined! If your code editor shows no type errors, it's possible that the editor is not utilizing the tsconfig settings of the project.

As for the main issue at hand, you can simply cast the type of

process.env.NEXT_PUBLIC_GOOGLE_ANALYTICS

to a string, like this:

<GoogleAnalytics gaId={process.env.NEXT_PUBLIC_GOOGLE_ANALYTICS as string} />

Alternatively, you can explicitly define the types for environment variables in a type declaration file, such as:

src/env.d.ts:

namespace NodeJS {
  interface ProcessEnv {
    NEXT_PUBLIC_GOOGLE_ANALYTICS: string;
  }
}

Additionally, it is advisable to validate environment variables. One recommended tool for this purpose is Zod.

Answer 2

During runtime, TypeScript type checking is not in effect, so nothing will break unless the GoogleAnalytics component fails to work if the gaId parameter is undefined! If your code editor shows no type errors, it's possible that the editor is not utilizing the tsconfig settings of the project.

As for the main issue at hand, you can simply cast the type of

process.env.NEXT_PUBLIC_GOOGLE_ANALYTICS

to a string, like this:

<GoogleAnalytics gaId={process.env.NEXT_PUBLIC_GOOGLE_ANALYTICS as string} />

Alternatively, you can explicitly define the types for environment variables in a type declaration file, such as:

src/env.d.ts:

namespace NodeJS {
  interface ProcessEnv {
    NEXT_PUBLIC_GOOGLE_ANALYTICS: string;
  }
}

Additionally, it is advisable to validate environment variables. One recommended tool for this purpose is Zod.

After I deploy my Next.js code to Vercel, including Google Analytics added by @next/third-parties, I am encountering an error that does not appear in development mode

Answer №1

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