import * as mongoose from 'mongoose';

console.log(mongoose.connect); // undefined

// but
console.log(mongoose);
/*
{ connections:
   [ NativeConnection {
       base: [Object],
       collections: {},
       models: {},
       config: [Object],
       replica: false,
       hosts: null,
       host: null,
       port: null,
       user: null,
       pass: null,
       name: null,
       options: null,
       otherDbs: [],
       _readyState: 0,
       _closeCalled: false,
       _hasOpened: false,
       _listening: false } ],
  plugins: [],
  models: {},
  modelSchemas: {},
  options: { pluralization: true },
  default:
   Mongoose {
     connections: [ [Object] ],
     plugins: [],
     models: {},
     modelSchemas: {},
     options: { pluralization: true } } }
*/