Process.platform returns "win32" for Windows. On Windows a user's home directory might be C:\Users[USERNAME] or C:\Documents and Settings[USERNAME] depending on which version of Windows is being used. On Unix this isn't an issue.
As mentioned in a more recent answer, the preferred way is now simply:
const homedir = require('os').homedir();
[Original Answer] Why not use the USERPROFILE
environment variable on win32?
function getUserHome() {
return process.env[(process.platform == 'win32') ? 'USERPROFILE' : 'HOME'];
}