New package (0.11.0+) brings Apollo Client into Browser bundle when not used in Client Components

[lionskape]

My project uses CommonJS (no "type": "module").
I found an issue.The new version of @apollo/experimental-nextjs-app-support have been added to a bundle, on pages where there is no ApolloProvider, only RSC calls of apollo client.

Steps to reproduce:

• install "@apollo/experimental-nextjs-app-support": "0.11.2"
• use const {data} = await(await getClient()).query({query: MyQuery}); on any nextjs page.tsx
• check the result bundle. There is an @apollo/experimental-nextjs-app-support in browser bundle, and all it deps (like Apollo Client)

[alessbell]

Hi there @lionskape 👋

What you're describing indeed sounds very strange. My first instinct is that a question of including server code in a client bundle would be best asked of the framework/bundler.

What version of Next.js are you using? Did you notice this change after this package, or multiple dependencies? Any additional information you can provide would be very helpful in determining where this issue would be best directed. Thanks!

[lionskape]

@alessbell hi!

I believe that it is just apollo client, which can be used on SSR (but I do not need it).
I'm using [email protected] with webpack (without customizations).

My case:
app/my-page/page.tsx (server component, no "use client") -> const {data} = await(await getClient()).query({query: MyQuery});. No more queries, no ApolloProvider.

"@apollo/experimental-nextjs-app-support": "0.10.1"
Everything works fine. Сlient bundle does not contains apollo client.

"@apollo/experimental-nextjs-app-support": "0.11.2"
Everything works, but in client bundle there is a lot of new unused code - @apollo/client and something extra from @apollo/experimental-nextjs-app-support

[jerelmiller]

Hey @lionskape 👋

0.11 added a new shared entry point that now uses export conditions in order to determine the right bundle to use (assuming you're importing from the top-level entry point). This should work well with Next.js and the app router as this is the bundling strategy React recommends for RSC architecture, though the sub imports (i.e. the /rsc, /ssr entry points) remained unchanged.

Can you put together a reproduction for us? A reproduction would go a long way to figuring out why you're seeing the bundle increase.

[phryneas]

I can reproduce it here: phryneas/apollo-client-nextjs-reproduction-341@8b39385

This is clearly a bug in Next.js. It should not bundle any library that's only referenced in RSC - no matter how we build, no matter how we bundle, it should not have any influence on that.

[phryneas]

vercel/next.js#68972

[lionskape]

@phryneas thank you for reproducing an issue!

I believe they will not include a fix in 14th release. May be it is possible to make workaround in this integration library? Something like additional dedicated @apollo/experimental-nextjs-app-support/rsc export point, with only rsc parts?

[phryneas]

Let's wait for their feedback first.
This is an immense bug that's at the core of the promise of RSC - not shipping server libraries to the client.
We don't even know the internals on how it is triggered on their side at this point.

[jmikrut]

Hey @phryneas just a heads-up, we had this same issue at Payload and turns out it's a tough problem to solve.

vercel/next.js#50285

If you have any files marked with use client then they're going to show up in the client side bundle regardless of intent. Is that what's happening in your case I wonder?

[phryneas]

Yeah, I had similar thoughts occur to me over the weekend - we have a RSC call that creates a component that references a client component.

I could reduce the impact with a well-placed and lazily executed React.lazy over in #345, so while I still believe that this is a bundling problem on the Next.js side, we can work around it now.

[phryneas]

@lionskape could you please verify if this fixes the issue for you?

npm i @apollo/experimental-nextjs-app-support@0.0.0-commit-release.0.1724059607.3b1a1ef

[lionskape]

@phryneas sorry for being late. Thank you, great job!

I have validated your variant, so:

• most of code gone from chunks loaded on page
• now I have separate chunk with apollo (but it is never loaded)
• I still have a bit of unused code in the bundle. I believe it is a stub for lazy "SimulatePreloadedQuery"

Maybe you can just create a separate entrypoint for rsc, without any "use client" imports in the import graph?
Looks like NextJS team does not treat this issue as a bug.

[phryneas]

@lionskape we're probably not going to get around that stub unless Next.js does something on their side.

Maybe you can just create a separate entrypoint for rsc, without any "use client" imports in the import graph?

We had separate entry points, and it has confused users a lot.
I fear that the moment we have that entrypoint, even if we don't recommend using it, a lot of users will pick it up - in large parts because LLMs just recommend bonkers code that "looks right" to users, but lacks nuance.

I think having that separate entrypoint would do more harm than good - especially since we want most users that use RSC to use the PreloadQuery component, and we'd have to drop that from that separate entrypoint.

It's good to know that this already brings a significant improvement, so I'm going to merge and ship that PR, it will benefit a lot of users. Thank you for bringing this up and testing it out!