Worker: TS2304 [ERROR]: Cannot find name 'postMessage'
When type-checking a worker script that uses the global
postMessage() method, deno check gives a TS2304 [ERROR]: Cannot find name 'postMessage' error. Is there any workaround?6 Replies
deno check doesn't seem to accept any argument to specify what context the script executes in (e.g. Window vs DedicatedWorkerGlobalScope), nor can it apparently infer it based on file name conventions (*.worker.ts)You'll need to use triple-slash type comment.
Do you mean
/// @deno-types="../worker.d.ts" and declare postMessage() in that file?
Doesn't the /// comment only works on imports, tho? I'm not importing anything.
Also, it just occured to me that a global postMessage() isn't specific to workers, and exists on the Window interface too. It's weird that Deno doesn't have it.No, I meant including (I think)
lib.webworker.d.ts which should maybe have the definitions globally available. Maybe.Thanks, it's actually mentioned in the docs and I missed it.
https://deno.land/manual@v1.35.2/advanced/typescript/types#using-triple-slash-directives
Deno
Types and Type Declarations | Manual | Deno
One of the design principles of Deno is no non-standard module resolution. When
TypeScript is type checking a file, it only cares about the types for the file,
and the
tsc compiler has a lot of log
It would be neat if
lib could be assigned per file pattern, inthe json configuration (so that I could have the default lib everywhere but use deno.worker for *.worker.ts)