How to do two-way reacting to data change in MongoDB (AngularJS) DB?

Question

MongoDB

Hello.
Actually a question in a subject.
It is necessary that when changing it in the database (via the admin panel), immediately react and change the data on the page. After timeout, check and make requests every n-th number of seconds. not an option, it loads a lot. Is there some kind of trigger that pulls MongoDB when something changes in the database, on which you can hang an event? Or what's the solution?

Answer 1

Via oplog is a dirty hack.
You have a code that writes to the database, so let it "notify" about changes, delivered via websocket.

Answer 2

hiddentao.github.io/robe/#oplog