Deno compat/bypass for Jiti

[birkskyum]

Environment

Similar to bun here

• feat: experimental native bun support #156
• Bun compatibility/bypass #154

It would be great to have a bypass for Deno.

Reproduction

Repro here

• Support Jiti (unjs) denoland/deno#20607
• Support Histoire (Vite based) denoland/deno#20606

Describe the bug

Jiti should not try to compile typescript when using Deno

Additional context

No response

Logs

No response

[pi0]

Hi dear @birkskyum thanks for opening issue but i am wondering does deno has same Node.js compatibility surface of Bun? (does it support mixed ESM/CJS and importing other files without .ts extension?)

[birkskyum]

Good question. Actually, I believe it's more picky. It does support CJS modules, but if I understand the announcement made that is only if they are used inside dependencies imported through a npm: specifier, and probably not mixed with esm. I'm not 100% sure what the best approach to jiti support is, but deno is at a point with npm/node compat where it makes sense now to figure out how to improve the story for local development, and here jiti does break some things - but the needed changes may very well be on the deno side.

[pi0]

Surely! We might also use a deno-specific ast transformer to handle necessary transformations (add extension, remap modules, etc) if that's what is needed on jiti side I'm totally up to it (only is a pitty because this way, Deno usage will be slower but i respect all reasons Deno runtime chose to keep stricter with ESM standards and disallow mixed syntaxes)

@birkskyum while you are here, are you also in UnJS discord channel? If not and like to work closely, my handle is @pi0 feel free to DM me for invite 👍🏼

[pi0]

We have introduced new jiti/native subpath for jiti v2 that always uses native import (tested against Deno 1.x).

Also made bun option generic to tryNative (#295) for main subpath export. Deno 1.x at least had some issues when i tested today. I think perhaps it is best that we let opting in into native-bypass for users/libs that use jiti (hopefully Deno 2.x will be better)