npm install error fsevents in Ohter Mac Platforms

Problem

When I tried to run npm install, it gave me this error

error code EBADPLATFORM

error notsup Unsupported platform for fsevents@1.1.3: wanted {“os”:”darwin”,”arch”:”any”} (current: {“os”:”win32",”arch”:”x64"})

Cause:

Error is indicating that you are installing fsevents module in other OS rather than Mac. fsevents module is only work for Mac Operating system

Solution:

the simple solution is to ignore fsevents when you are using Windows or Linux operating system, this can be done by:

1 — adding this to package.json solved the problem for me

"optionalDependencies": {
    "fsevents": "*"
  }

2 — Another solution would be to ignore optional dependencies during the installation (I got it from search the problem on internet) : npm install --no-optional polymer-cli -g