Passport-Facebook not providing email even if it is in scope

From Facebook graph APIv2.4, we need to explicitly specify fields to get.

Introducing Graph API v2.4

So, we can write like:

  passport.use(new FacebookStrategy({
      clientID: config.facebook.clientID,
      clientSecret: config.facebook.clientSecret,
      callbackURL: config.facebook.callbackURL,
      profileFields: ['id', 'email', 'gender', 'link', 'locale', 'name', 'timezone', 'updated_time', 'verified'],
    },

You do have the callback part of the code, right?:

app.get('/oauth/facebook/callback', passport.authenticate('facebook', {
    failureRedirect: '/login',
    successRedirect: '/',
    scope:['email']
}));

And, yes, indeed, this should be done with the scope:['email'], as per instructions from your link and this one here also.