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nextjs - 💡(How to fix) Fix React Compiler in Next.js 16 shows "incompatible library" warning for hooks returning dynamic functions [1 comments, 2 participants]

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vercel/next.js#85318•Fetched 2026-04-08 02:16:23
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Error Message

  • This can be confusing for developers, as it is not an actual runtime error.

Root Cause

  • The warning is caused by the React Compiler attempting to memoize dynamic function hooks.
  • This can be confusing for developers, as it is not an actual runtime error.
  • It would be helpful if Next.js 16 documented which patterns trigger this warning and whether it can be safely ignored.

Code Example

Next.js: 16.0.0
React: 19.x
OS: Windows 10
Node: 22.x
RAW_BUFFERClick to expand / collapse

Link to the code that reproduces this issue

https://github.com/jsdev-robin/devmun-shop-client

To Reproduce

  1. Create a new Next.js 16 project.
  2. Use any custom hook or third-party hook that returns dynamic functions.
  3. Run the development server with next dev.
  4. Observe the warning in the terminal.

Current vs. Expected behavior

The compiler should not display a warning for hooks that are used correctly and do not break runtime behavior.

Provide environment information

Next.js: 16.0.0
React: 19.x
OS: Windows 10
Node: 22.x

Which area(s) are affected? (Select all that apply)

Not sure

Which stage(s) are affected? (Select all that apply)

next dev (local)

Additional context

  • The warning is caused by the React Compiler attempting to memoize dynamic function hooks.
  • This can be confusing for developers, as it is not an actual runtime error.
  • It would be helpful if Next.js 16 documented which patterns trigger this warning and whether it can be safely ignored.

extent analysis

TL;DR

The warning caused by the React Compiler attempting to memoize dynamic function hooks in Next.js 16 can potentially be mitigated by adjusting the usage of custom or third-party hooks that return dynamic functions.

Guidance

  • Review the implementation of custom and third-party hooks to ensure they are not unnecessarily returning dynamic functions, which could trigger the React Compiler's memoization warning.
  • Consider reaching out to the maintainers of the third-party hooks or the Next.js community for guidance on patterns that trigger this warning and whether it can be safely ignored in specific contexts.
  • Evaluate the documentation of Next.js 16 and React 19.x for any mentions of this issue or similar warnings related to hook usage.
  • If the warning does not affect runtime behavior, it might be possible to suppress it, but this should be done with caution and ideally after understanding the implications.

Example

No specific code example can be provided without more details on the custom or third-party hooks in use. However, the general approach would involve inspecting the hook functions for any dynamic components that could be optimized or refactored to reduce the warning's occurrence.

Notes

The solution may vary depending on the specific implementation of the hooks and the exact requirements of the application. It's also important to note that while the warning might not cause runtime errors, understanding and addressing its root cause can improve development efficiency and code quality.

Recommendation

Apply workaround: Given the current information, it seems that adjusting the usage of dynamic function hooks or seeking community guidance might be the most viable approach until more detailed documentation or a potential fix from Next.js or React becomes available. This recommendation is based on the premise that the warning, while potentially confusing, does not indicate a runtime error but rather a compiler optimization issue.

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nextjs - 💡(How to fix) Fix React Compiler in Next.js 16 shows "incompatible library" warning for hooks returning dynamic functions [1 comments, 2 participants]