`CompressionStream` & `DecompressionStream` types don't support brotli & zstd

[kylekz]

What version of Bun is running?

1.3.3+274e01c73

What platform is your computer?

Linux 6.6.87.2-microsoft-standard-WSL2 x86_64 x86_64

What steps can reproduce the bug?

simple example from the 1.3.3 blog post detailing CompressionStream implementation:

async function main() {
  const response = await fetch("https://example.com");
  const zstd = response.body!.pipeThrough(new CompressionStream("zstd"));
}

What is the expected behavior?

types for CompressionStream and DecompressionStream should have brotli and zstd added

What do you see instead?

type error: Argument of type '"zstd"' is not assignable to parameter of type 'CompressionFormat'.

Additional information

No response

[RiskyMH]

Yeah they aren't officially standard ones. I think it's still possible for bun to add extra "overloads" though.

[kylekz]

yep the functionality works fine since it can just be casted to CompressionFormat, it's just a bit strange to require casting or tsignore for an officially supported feature

[truongan07]

• I made new the function from CompressionStream / DecompressionStream to easy using

• And this is native CompressionStream / DecompressionStream

• I did not get any errors such as type error: Argument of type '"zstd"' is not assignable to parameter of type 'CompressionFormat'. Maybe it just happens Linux 6.6.87.2-microsoft-standard-WSL2 x86_64 x86_64 ?

[RiskyMH]

yep the functionality works fine since it can just be casted to CompressionFormat, it's just a bit strange to require casting or tsignore for an officially supported feature

Yoo nice, feel free to make a pr and @alii should review and merge!

[kylekz]

#25374

admittedly needed claude to guide me but these changes when made in my own project's node_modules seems to work, feel free to just close if it's just slop