First, in order to help simplify what I’m working with, I’ll use the abbreviated form of Speaker and SpeakerService, as shown in Figure 1. Figure 1 Speaker and SpeakerService C# Copy import { Injectable } from '@angular/core'; export class Speaker { id = 0 firs...
Finally we need to load the environment configuration and also setup our module to use the AngularFire package, so go ahead and change yourapp/app.module.tsto: import{NgModule}from'@angular/core';import{BrowserModule}from'@angular/platform-browser';import{RouterModule,RouteReuseStrategy,Routes}from...
createValidator(options):AsyncValidatorFn{// This is used to signal streams to terminate.letchanged$=newSubject<any>();return(control:AbstractControl):Observable<ValidationResult|null>:{changed$.next();// This will signal the previous stream (if any) to terminate.returncontrol.valueChanges.takeUntil...
AngularFire is an official angular library to implement Firebase functionalities in the Angular project, as we are using the Ionic Angular project. In our application, some of the data are for public and some for private and we need authentication functionalities that allows user to save, edit,...