json modules

[MylesBorins]

There is a proposal -> https://github.com/tc39/proposal-json-modules
It build on top of import assertions -> https://github.com/tc39/proposal-import-assertions

V8 does not yet support import assertions though AFAIK... but I also think that an embedder can choose if they need to require the import assertion or not, need to review the spec.

[bartlomieju]

V8 8.9 does support import assertions and should be available in the next release of rusty_v8 (denoland/rusty_v8#567)

[MylesBorins]

OH WOW! That is absolutely incredible, I had no idea V8 moved so quickly on it.

Is it behind a flag? Is the deno team working on implementing standard JSON modules?

[bartlomieju]

Is it behind a flag?

I don't think so, users configure supported assertions using a field on CreateParams. Import assertions are later available on ModuleRequest in module resolve callback.

Is the deno team working on implementing standard JSON modules?

Yep! Once we upgrade rusty_v8 we will look into implementing that and WASM modules (we were waiting on v8 to implement import assertions for this purpose 😅 )

[MylesBorins]

/cc @littledan about this.