Auth Service using RxJS for store global state

auth-service-rxjs.js

import { Observable, BehaviorSubject } from 'rxjs'
import axios from 'axios'

const API_URL = 'http://localhost:8080'

const API = {
  get (url) {
    return Observable.fromPromise(axios.get(API_URL + url))
  }
}

const $currentUser = new BehaviorSubject(0) // assume 0 is uninit value

export default {
  currentUser: $currentUser.asObservable()
    .filter((x) => x !== 0), // exclude uninit value
  fetchCurrentUser () {
    API.get('/api/me')
      .subscribe((user) => {
        $currentUser.next(user)
      })
  }
}