This seems like a regression (was working in v0.15.0)
Pretty sure this is https://github.com/electron/electron/pull/27582 - that this is fixed when one disables nodeIntegrationInWorker and only shows up on macOS and Linux seemingly confirms this
Unfortunately, it seems like upgrading to a version of Electron that contains that fix (I tried v12.0.0) doesn't fix the issue. Intellisense still fails to load, and disabling nodeIntegrationInWorker fixes the problem.
@erickzhao i'll keep digging then - mind if i assign myself to this?
@codebytere go for it!
Alternatively, I'm thinking of reverting https://github.com/electron/fiddle/commit/5e3a58896ebc771db0c7edbc10fecfbf30a1e48a and going back to the drawing board.