boramalper
boramalper•4w 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
bartlomieju•4w ago
Deno doesn't support FetchEvent global so you can't instantiate it You'd need to provide a polyfill

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