`globalThis.WebSocket` is undefined and it can't be proxied.

[Afsoon]

Hello

Our current dependanbot PR is failing with the latest MSW version, after debugging and tracking changes in the repository I have conclude the following:

• Prior to this PR, https://github.com/mswjs/interceptors/pull/665, the check of environment was based if globalThis.WebSocket !== undefined, but the new guard function doesn't check it anymore https://github.com/mswjs/interceptors/blob/7aff641f8eddbbe53d5d23ddc4b8295e708dcdc0/src/utils/hasConfigurableGlobal.ts#L5-19
• I have tested this changes on Node 20 LTS and Node 22.11, new LTS version, with the same error TypeError: Cannot create proxy with a non-object as target or handler

Our setup is Vitest + Happy-DOM + Remix, I have tested prior version of MSW, and it didn't have this problem.

I'm not 100% sure of the fix, but I think it's a missing a check that is:

  if (typeof descriptor.get() === "undefined") {
    return false;
  }

If it's the fix, I can create a PR with the test.

[kettanaito]

Hi, @Afsoon. Thanks for reporting this.

Let's discuss it first. Just checking the getter not being there isn't enough—the property descriptor can have a value and no get, and that's a valid property that must return true. Will look at your pull request in more detail once I have a moment (thanks for opening that btw!).