balocodes

import { Component, OnInit } from "@angular/core";
import { CommsService } from "../comms-service.ts";

@Component({
...
})
export class FirstComponent implements OnInit {
  listStatus;
  constructor(public _commService: CommsService) {}
  ngOnInit() {

balocodes

import { Injectable } from "@angular/core";
import * as Rx from "rxjs";

@Injectable()
export class CommsService {
  // Observable with initial value set to false
  private waitingListStatus = new Rx.BehaviourSubject(false);
  
  // Updates the value of waitingListStatus
  updateWaitingList = (status: boolean) => {