missing transfer argument for postMessage

[nabezokodaikon]

postMessage from worker fails.
How can I get it to work properly?

main.ts

const worker = new Worker(new URL('worker.ts', import.meta.url).href, {
  type: 'module',
  deno: true
});

worker.postMessage('foo');

worker.ts

self.onmessage = async (e: any) => {
  console.log(e.data);
  self.postMessage('bar', '*'); // <-- Error
};

Running command
bash $ deno run --unstable --allow-read main.ts

Error message

error: Uncaught Error: TS2554 [ERROR]: Expected 1 arguments, but got 2.
  self.postMessage(message, '*');
                            ~~~

[lucacasonato]

That argument is used to zero-copy objects that implement the transferable interface (ArrayBuffer and MessagePort). Deno does not support structured cloning yet (which is a prerequisite for Transferrable), and thus does not support the optional second parameter on postMessage yet. Using a string as the second parameter to postMessage is not valid anyway because it is not Transferrable.

Ref https://developer.mozilla.org/en-US/docs/Web/API/Worker/postMessage and https://developer.mozilla.org/en-US/docs/Web/API/Transferable

[nabezokodaikon]

Thank you. understood.

[kitsonk]

Ref #3557

[bartlomieju]

Closing in favor of #3557