moved to https://github.com/zkochan/packages/tree/master/is-subdir
Return whether a directory is a subdirectory of another directory
Cross-platform. Works correctly on Windows, where directory paths can start with disk drive letters in different casings. Like c:\foo and C:\foo\bar.
npm i -S is-subdir'use strict'
const path = require('path')
const isSubdir = require('is-subdir')
console.log(isSubdir(process.cwd(), path.resolve('node_modules')))
//> true