boramalper•2w ago

How can I instantiate a FetchEvent in my test?

Hi! I'm testing my Service Worker library that accepts a FetchEvent as an input. In my tests of that library, I want to instantiate a FetchEvent to test it, but I'm getting

error: ReferenceError: FetchEvent is not defined

instead. My compiler options are:

{
  "compilerOptions": {
    "lib": ["ES2023", "WebWorker", "deno.ns"],
    "strictNullChecks": true
  },
}

{
  "compilerOptions": {
    "lib": ["ES2023", "WebWorker", "deno.ns"],
    "strictNullChecks": true
  },
}

Deno version:

deno 2.2.10 (stable, release, aarch64-apple-darwin)
v8 13.5.212.10-rusty
typescript 5.7.3

deno 2.2.10 (stable, release, aarch64-apple-darwin)
v8 13.5.212.10-rusty
typescript 5.7.3

Thank you! May 7 edit: Also asked on StackOverflow now.

1 Reply

bartlomieju•6d ago

Deno doesn't support FetchEvent global so you can't instantiate it You'd need to provide a polyfill

How can I instantiate a FetchEvent in my test?

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