IntelliJ IDEA does not find operators of Observable in rxjs5 - intellij-idea

Question

I just installed rxjs 5 beta 3 via npm i rxjs#5.0.0-beta.3.
I have the following example code:
import {Observable} from "rxjs"
new Observable(o => o.next(42)).filter(() => true);
This code compiles perfectly well when using ts-node for example.
But when looking at this code inside IntelliJ IDEA, the filter() operator is not found.
When using operators on an Observable instance, they are not found either.
The suggested static members of Observable are:
create()
if()
throw()
The suggested members of an instance of Observable are:
_isScalar()
forEach()
lift()
subscribe()
I also tried to import only what I need, but still my IDE tells me that filter() does not exist on the Observable instance:
import {Observable} from "rxjs/Observable"
import "rxjs/add/operator/filter"
new Observable(o => o.next(42)).filter(() => true);
Any suggestions how to make IntelliJ IDEA know about the operators?

Answer 1

To fix this issue you need to add RxJS as a javascript library in IntelliJ:
Go to Settings -> Languages and frameworks -> JavaScript -> Libraries
Click Add...
Add node_modules/rxjs by clicking the + button
Click all the OK buttons until you are back in your editor.
This solution is tested to work on IDEA 2016.1.3

Answer 2

Please, check IDEA 2016.1.2 or higher
Note: Directory node_modules must be not excluded from the project.
Otherwise, see answer https://stackoverflow.com/a/38499577/1057218
Note 2: File package.json must contain the direct dependency (or devdependency) 'rxjs'

Answer 3

Accepted answer doesn't work. I have tested IntelliJ IDEA 2016.2.1 EAP (ideaIU-162.1447.7) and the problem still persist.
The rabbit hole goes as follows:
In the accepted answer you find a link to version 2016.1, but that doesn't fix the problem.
Then you see a comment with a link to the IntelliJ bugtracker, where OP has the first/top comment.
At the bottom of that issue/bug thread you find a comment saying IDEA 2016.2 162.426.1 EAP will definitely fix the problem, it doesn't.
Bottom line, if you import all of what RxJS has to offer with import {Observable} from 'rxjs/Rx'; IntelliJ will still complain that it can't find methods like .map and .filter