EBADPLATFORM when npm install --save-dev msw on Windows 10

Describe the bug

Running npm install --save-dev msw on Windows 10 produces an error

npm ERR! code EBADPLATFORM
npm ERR! notsup Unsupported platform for fsevents@2.3.2: wanted {"os":"darwin"} (current: {"os":"win32","arch":"x64"})
npm ERR! notsup Valid OS:    darwin
npm ERR! notsup Valid Arch:  undefined
npm ERR! notsup Actual OS:   win32
npm ERR! notsup Actual Arch: x64

Environment

• msw: 0.27.1
• nodejs: 15.12.0
• npm: 7.6.3

To Reproduce

Steps to reproduce the behavior:

1. Run npm install --save-dev msw
2. See error

Expected behavior

msw is susscessfully installed on Windows 10 environment

[kettanaito]

To clarify: that warning shouldn’t affect your experience with MSW. It’s stated in the message that fsevents is an optional dependency. I don’t see anything we can do on the library’s side, it’s the way fsevents behaves, not being our direct dependency.

[amd-9]

@kettanaito sure!

On machine with nodejs 12.3.1 result was

PS C:\test> npm install msw

> msw@0.27.1 postinstall C:\test\node_modules\msw
> node -e "try{require('./config/scripts/postinstall')}catch(e){}"

npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@~2.3.1 (node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.3.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN test@1.0.0 No description
npm WARN test@1.0.0 No repository field.

+ msw@0.27.1
added 77 packages from 122 contributors and audited 78 packages in 4.143s

8 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities

PS C:\test>     

On machine with nodejs 15.12.0 (suprisingly):

PS C:\test> npm install msw

added 77 packages, and audited 78 packages in 4s

8 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities
PS C:\test>