"Overload signatures must all be ambient or non-ambient" when using setTimeout in another function

Question

I have a setTimeout callback but when i put this inside another function, I'm getting an error with tsc:

function delayedSnapshot() {

    setTimeout( function() {
        var filename = "/Users/dc/dump/heapdump.heapsnapshot";
        heapdump.writeSnapshot(function(err, filename) {
          console.log("dump written to", filename);
        });
        process.exit(1);

    }, 5000);

}

>> error TS2384: Overload signatures must all be ambient or non-ambient.

If i remove the outer wrapping delayedSnapshot it will compile fine however. I found something here on what ambient means but it doesn't seem relevant.

http://www.typescriptlang.org/Handbook#modules-working-with-other-javascript-libraries

can someone explain how I stop this error from happening but still keep my wrapper to control the callback firing or not?

I couldn't reproduce the error, and everything looks fine to me. Is that all of the code? — thoughtrepo, Sep 03 '15 at 23:17

score 3 · Answer 1 · edited Mar 12 '19 at 01:08

3

Change the function name from delayedSnapshot() to something else.

There seems to be a delayedSnapshot() method defined/declared somewhere else, which is being overloaded here.

edited Mar 12 '19 at 01:08

Grant Foster

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answered Mar 11 '19 at 19:34

Yash

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I can't check it now but it seems like a plausible answer. – dcsan Jan 06 '20 at 03:46

"Overload signatures must all be ambient or non-ambient" when using setTimeout in another function

1 Answers1