Why Does My Next.js Static Site Fail to Fetch API Route Data During `npm run build`?

Unable to Fetch API Route During Next.js Static Website Production Build

When building a Next.js static website for production using npm run build, errors may arise due to the inability to fetch data from an API route. This issue typically occurs when using getStaticProps and getStaticPaths to fetch data from an API route.

To resolve this issue, it is important to understand that API routes, which are invoked dynamically during website operation, are not available during the static build process. This is because the server is not running at that time.

Therefore, a recommended approach is to directly implement the server-side code in getStaticProps and getStaticPaths instead of using an API route as an intermediary. This allows for data to be fetched directly from the data source during the build.

Using this approach, getStaticProps will fetch data from the data source and return it as props to the component. Similarly, getStaticPaths will generate the necessary paths for the static website based on the fetched data.

In summary, directly fetching data in getStaticProps and getStaticPaths during the static build process eliminates the issue of relying on API routes, which are not available at build time. This approach ensures that the static website can access data properly.

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