Repairing RxJS Operator Autocomplete Feature in WebStorm for TypeScript

I am currently working on an Angular 2 project using WebStorm as my IDE.

Within one of my components, I am coding in TypeScript and utilizing the Observable :

import { Observable } from "rxjs/Rx";
import 'rxjs/Rx';

@Component({...})
export class SearchComponent {

  @ViewChild('input') input: ElementRef;

  ngAfterViewInit() {
    let inputElement = this.input.nativeElement;
    let keyups = Observable.fromEvent(inputElement, 'keyup');  
    keyups.subscribe(data => console.log(data));
  }
}

Although this code functions as intended (printing to the console when typing in the input field), there are issues flagged by WebStorm regarding the fromEvent method ("Unresolved function or method").

Additonally, when attempting autocomplete on the Observable class, most RxJS operators are not showing up. For example, only one method (withLatestFrom) is suggested instead of a list including from, fromCallback, fromEvent, fromPromise...

How can I enable proper autocomplete/TypeScript support for observables within WebStorm?

I have experimented with different methods of importing Observable and also followed recommendations from this article (such as adding 

"files": ["node_modules/rxjs/Rx.KitchenSink.d.ts"]
to tsconfig.json), but none have successfully resolved the issue.

typescriptangularwebstormrxjs

Answer №1

After encountering similar difficulties, I found that even the latest version of WebStorm (2016.2 final) was not solving the issue. A helpful solution was buried in a comment on another response, so to bring more attention to it, I am sharing it as a proper guide here:

Remove the .idea folder.

Following this step and then restarting WebStorm resolved all the rxjs definitions for me.

Answer №2

My experience using WebStorm 2016 was greatly improved by following these steps for my angular 2 + ionic 2 project:

WebStorm -> Preferences -> Languages & Frameworks -> JavaScript -> Libraries 
-> [Make sure 'ECMAScript 6' and 'your-project/node_modules' are selected]
.then Apply -> Save -> Restart WebStorm

Answer №3

After some investigation, it was determined that the issue lied with PhpStorm.

Contacting Jetbrains support proved to be fruitful as they recommended updating to version 2016.2 EAP (Early Access Program), which successfully resolved the issue at hand.

Answer №4

Experiment with these configurations to test if webstorm detects them

tsconfig.json ( located in the main directory of your angular2 project )

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false
  }
}

In your package.json ( Make sure typings are installed if not already )

"devDependencies": {
    "typings":"^1.0.4"
  }

Create typings.json file in the root directory of your project and ensure necessary dependencies are listed

typings.json 

{
  "globalDependencies": {
    "core-js": "registry:dt/core-js#0.0.0+20160317120654",
    "jasmine": "registry:dt/jasmine#2.2.0+20160505161446",
    "node": "registry:dt/node#4.0.0+20160509154515"
  }
}

Once done, install the new dev modules by running

npm install

then install the typings using this command

typings install

Switch over to Webstorm/Phpstorm and let the IDE complete indexing. Check if Webstorm's autocomplete now suggests multiple methods related to Observables.

Try importing Observables in your project files like

import { Observable } from 'rxjs';

This solution may not be what you expected, but it's worth a try when other options have been exhausted.

EDIT: corrected file name from typing.json to typings.json

Answer №5

I encountered a similar issue while using WebStorm 2016.3 and was able to solve it by configuring the IDE to utilize rxjs as a JavaScript library:

  1. Navigate to "Preferences" and go to "Languages & Frameworks > JavaScript > Libraries".

  2. Click on "Add..." and fill in the following fields:

    • Name: rxjs
    • Framework type: node_modules
    • Visibility: project
    • Click on the "+" button and link the directory of rxjs located within the project's node_modules directory.

  3. Click on "OK" and verify that the library is active at the project level.

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