Typescript: error TS2554: Expected 2-3 arguments, but got 1

[shamhub]

With given tsconfig.json,

{

    "compilerOptions": {

      "lib": ["es2015", "dom"]
    },
    "files": [
      "./project1/tstut.ts",
      "./project1/worker.ts"

    ]
  }

---

For below worker code(./project1/worker.ts),

    window.addEventListener('message', (e) => {
        // console.log(e)
        if(e.data === 'do some work'){
            console.log('Worker is about to start some work');
            let count: number =0;
            for(let i: number=0; i<1000; i++){
                count += i;
            }
            window.postMessage({message:count});
        }

    })

Instead of self, window object is used in TS worker code. JS allows syntax self.postMessage({message: count})

How to resolve below error for postMessage()?

Expecting 2-3 arguments, but got 1

[andy-ms]

According to mdn it looks like the second argument should always be provided?

[shamhub]

@andy-ms Code is on https://shamhub.github.io/ you can see webworker example there
Do I need to mention second argument as "https://shamhub.github.io/" or "https://shamhub.github.io/project1"?

[andy-ms]

I don't know, but it doesn't seem like this is a compiler bug, maybe look for a help forum somewhere?

[Ajyress]

Hello,
I have got the exact same issue. The error appears on the line postMessage() call while compiling a WebWorker.ts file in Angular 6. There is no error on the browser side though, the WebWorker works as expected.
Any help would be appreciated. Regards

[shamhub]

@Ajyress https://stackoverflow.com/questions/50402004/error-ts2554-expected-2-3-arguments-but-got-1

[typescript-bot]

Automatically closing this issue for housekeeping purposes. The issue labels indicate that it is unactionable at the moment or has already been addressed.

[Bandito11]

It's 2019 and I still get the error. The compiler is confusing the one of the web worker object with the one of the window object.

[zzt1224]

2020, still.

[ibraheemhlaiyil]

May 2020, still.

[2000Vlad]

June 2020 still get the error

[dullbananas]

July 2020, found this on google

[flyce]

Nov 2020, still