builder
builder copied to clipboard
BuilderIO
Error when running in latest Next.js version with middleware
On Next.js v12, you'll get this when adding middleware to your app:
`eval` not allowed in Middleware pages/_middleware
error - node_modules/@builder.io/sdk/dist/index.esm.js?b22a (919:0) @ <unknown>
TypeError: Cannot read property 'parse' of null
This points to this line which makes use of serverOnlyRequire. The problem is that that function makes use of eval to detect require and since Next.js doesn't allow eval in middleware it'll throw no matter what so I think another non-eval check is needed.
This happens because I import somethings that imports @builder/react in my middleware. If I remove that import or convert it to a dynamic import it works so I can work around it. But regardless, maybe there's a better alternative to using eval?
This issue also happens if you try to run Next.js with server components. That one is harder to work around.
Hi @kevva thanks for reporting this issue, do you have any kind of reproduction steps for the issue with nextjs server components?
For the middleware it looks like it's a hard limit as it only support a subset of nodejs API, what's the use case for using the react sdk in the middleware function?
This is fixed and released in the latest stable version please use @builder.io/[email protected] to get the fix, thank you for reporting