nextjs - 💡(How to fix) Fix `next-router-prefetch` header missing on some prefetch requests [4 comments, 3 participants]

TL;DR

• The issue can be mitigated by ensuring all prefetch requests include the next-router-prefetch header to prevent duplicate prefetching and reduce unnecessary CSP inclusions.

Guidance

• Review the Next.js configuration to ensure that the next-router-prefetch header is correctly set for all prefetch requests.
• Verify that the missing configuration in the CSP settings is correctly implemented to include the next-router-prefetch header.
• Check the network panel to confirm that the next-router-prefetch header is present in all prefetch requests after applying the configuration changes.
• Consider adding logging or debugging statements to identify cases where the next-router-prefetch header is missing and investigate the root cause.

Example

No specific code snippet can be provided without modifying the original code, but ensuring the next-router-prefetch header is set in the prefetch requests can be achieved by reviewing the next.config.js file and the CSP configuration.

Notes

The provided information suggests that the issue is related to the next-router-prefetch header not being included in some prefetch requests, but the exact cause is unclear. Further investigation into the Next.js configuration and the CSP settings is necessary to determine the root cause.

Recommendation

• Apply workaround: Ensure all prefetch requests include the next-router-prefetch header to prevent duplicate prefetching and reduce unnecessary CSP inclusions, as this is a more immediate solution to mitigate the issue while the root cause is investigated.