vscode-hover-wrong-variable-data.js

index.js

// install rxjs
// configure vscode to run this file

const Rx = require('rxjs')
const { Observable } = Rx
const EventEmitter = require('events')
const myEmitter = new EventEmitter()
const START_REGISTRATIONS_POLL = 'START_REGISTRATIONS_POLL'
const STOP_REGISTRATIONS_POLL = 'STOP_REGISTRATIONS_POLL'

function onPollRequest (observer) {
  myEmitter.on(
    START_REGISTRATIONS_POLL,
    () => {
      observer.next({ type: START_REGISTRATIONS_POLL })
    }
  )
  myEmitter.on(
    STOP_REGISTRATIONS_POLL,
    () => {
      observer.next({ type: STOP_REGISTRATIONS_POLL })
      setTimeout(() => observer.complete())
    }
  )
}

// actions to actions
// START_POLL to SET_REG
//

const obs = Rx.Observable.create(onPollRequest)
  .switchMap(action$ => {
    return Observable.interval(2000) // 0, 1, 2
      .startWith(-1)
      // .subscribe() // -1, 0, 1, 2
      .mergeMap(i => {
        return Observable.of(null).delay(100)
        .map(j => ({ i, type: 'FAKE_SET_REGISTRATIONS' }))
      })
      .takeWhile(action => {
        debugger // hover `action$` below
        return action$.type ?
          action$.type !== STOP_REGISTRATIONS_POLL :
          true
      })
  })

obs.subscribe(val => {
  console.log(`value: ${JSON.stringify(val)}`)
})

myEmitter.emit(START_REGISTRATIONS_POLL)
setTimeout(() => {
  myEmitter.emit(STOP_REGISTRATIONS_POLL)
}, 10)