How to remake the code so that it runs as a separate module?

Question

JavaScript

It is not possible to transfer sending email to the module. This code is safely sent from app.js, but when trying to take it out as a separate module, it swears at app, which is logical (standard express.js architecture). Does anyone know what needs to be changed here?

var mailer = require('express-mailer');

router.get('/', function (req, res, next) {
  mailer.extend(app, {
    from: '[email protected]',
    host: 'smtp.yandex.ru',
    secureConnection: true,
    port: 465,
    transportMethod: 'SMTP',
    auth: {
      user: '[email protected]',
      pass: 'password'
    }
  });
  app.mailler.send('email', {
    to: '[email protected]',
    subject: 'test'

  }, function (err) {
    if (err) {
      console.log('error');
      return
    }
    res.send('email sent');
  });
});

Answer 1

Probably because you don't have app, router variables defined. Maybe they need to be imported first?