Using vitest without defining `nodejs_compat` for my worker

I am following the instructions here: https://developers.cloudflare.com/workers/testing/vitest-integration/get-started/write-your-first-test/

It says that:

In your project’s wrangler.toml configuration file, […] include nodejs_compat in your compatibility flags.

My lib doesn't need that flag so it seems a bit silly just to enable it for tests. Is there a way to run tests without that flag?

Cloudflare Docs

Write your first test | Cloudflare Workers docs

Write unit tests against Workers.

Walshy•10/14/24, 9:54 AM

No, the vitest integration needs it for running tests

DaveJOP•10/14/24, 9:54 AM

@Walshy | Out of office Thanks. Thinking about it now. I guess I could just point the tests at a different toml file right?

Walshy•10/14/24, 9:55 AM

Sure if you wanted

Walshy•10/14/24, 9:55 AM

Any reason to not just enable though?

DaveJOP•10/14/24, 9:56 AM

@Walshy | Out of office Not really, it just adds to the weight of the worker when it really isn't needed I guess.

Walshy•10/14/24, 9:57 AM

Doesn't need to. If you do compatibility_flags = ["nodejs_compat", "no_nodejs_compat_v2"]compatibility_flags = ["nodejs_compat", "no_nodejs_compat_v2"]

It'd use node compat v1, only runtime APIs. Nothing extra in the worker

WWalshy Doesn't need to. If you do `compatibility_flags = ["nodejs_compat", "no_nodejs_c...

DaveJOP•10/14/24, 10:00 AM

runtime APIs also add weight, right? I know we talking about tiny differences here. So it's probably more about my OCD rather than a legitimate concern.

Walshy•10/14/24, 10:01 AM

Nah, it's built into the runtime. They just are usable, they don't touch your code at all.

Just like fetchfetch and cachescaches don't add any weight

WWalshy Nah, it's built into the runtime. They just are usable, they don't touch your co...

DaveJOP•10/14/24, 10:03 AM

Cool, I thought they might technically add a bit to the startup time to make them available. Anyway, thank you for your help.

Using vitest without defining `nodejs_compat` for my worker

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