Angular 6 – User Registration and Login Example & Tutorial
Today, We want to share with you Angular 6 – User Registration and Login Example & Tutorial
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In this post we will show you angular 6 User Registration & Login Example Tutorial,
, hear for Complete user registration system using angular 6 we will give you demo and example for implement.
In this post, we will learn about Simple User Registration & Login Script in angular 6 with an example.
Angular 6 Example
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- Angular 6 Folder Project Structure
- Angular 6 CLI Installation
- Angular 6 Module File
- Angular 6 Components
- Angular 6 Services
- Angular 6 Routing
- Angular 6 CSS
- Angular 6 Class Binding
- Angular 6 Animation
- Angular 6 Templating
- Angular 6 HTTP Client
AngularJS 6 Login and Registration Script – Part 1
Angular 6 Authentication Tutorial [Login, Logout, Register, Forgot Password & Remember Me Functionality] – Part – 1
Angular 6 Login And Registration Module
There are the available for AngularJS 6.0 Part1, Part2 and Part3 Step By step Example and source code available.
Angular 6 Tutorial Project Structure
It is available full angular 6 project or web Application structure available Angular 6 Tutorial Project Structure
Angular 6 Alert Component Template
files & folders Path: /src/spp/_directives/alert.component.html
<div>{{alert-msg.text}}</div>
Angular 6 Alert Component
files & folders Path: /src/spp/_directives/alert.component.ts
import { Component, OnInit, OnDestroy } from '@angular/core';
import { Subscription } from 'rxjs';
import { AlertService } from '../_services';
@Component({
selector: 'alert',
templateUrl: 'alert.component.html'
})
export class AlertComponent implements OnInit, OnDestroy {
private subscription: Subscription;
alert-msg: any;
constructor(private alertService: AlertService) { }
ngOnInit() {
this.subscription = this.alertService.getMessage().subscribe(alert-msg => {
this.alert-msg = alert-msg;
});
}
ngOnDestroy() {
this.subscription.unsubscribe();
}
}
Angular 6 Auth Guard
files & folders Path: /src/spp/_guards/auth.guard.ts
import { Injectable } from '@angular/core';
import { Router, CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
@Injectable()
export class AuthGuard implements CanActivate {
constructor(private router: Router) { }
canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
if (localStorage.getItem('activeStudent')) {
return true;
}
// not logged in so redirect to login page with the return url
this.router.navigate(['/login'], { queryParams: { callbackUri: state.url }});
return false;
}
}
Angular 6 Fake Backend Provider
files & folders Path: /src/spp/_helpers/fake-backend.ts
import { Injectable } from '@angular/core';
import { HttpRequest, HttpResponse, HttpHandler, HttpEvent, HttpInterceptor, HTTP_INTERCEPTORS } from '@angular/common/http';
import { Observable, of, throwError } from 'rxjs';
import { delay, mergeMap, materialize, dematerialize } from 'rxjs/operators';
@Injectable()
export class FakeBackendInterceptor implements HttpInterceptor {
constructor() { }
intercept(request: HttpRequest, next: HttpHandler): Observable<HttpEvent> {
// array in local storage for registered students
let students: any[] = JSON.parse(localStorage.getItem('students')) || [];
// wrap in delayed observable to simulate server api call
return of(null).pipe(mergeMap(() => {
// authenticate
if (request.url.endsWith('/api/authenticate') && request.method === 'POST') {
// find if any student matches login credentials
let filteredStudents = students.filter(student => {
return student.studentname === request.body.studentname && student.password === request.body.password;
});
if (filteredStudents.length) {
// if login details are valid return 200 OK with student details and fake jwt token
let student = filteredStudents[0];
let body = {
id: student.id,
studentname: student.studentname,
studFname: student.studFname,
studLname: student.studLname,
token: 'fake-jwt-token'
};
return of(new HttpResponse({ status: 200, body: body }));
} else {
// else return 400 bad request
return throwError('Studentname or password is incorrect');
}
}
// get students
if (request.url.endsWith('/api/students') && request.method === 'GET') {
// check for fake auth token in header and return students if valid, this security is implemented server side in a real application
if (request.headers.get('Authorization') === 'Bearer fake-jwt-token') {
return of(new HttpResponse({ status: 200, body: students }));
} else {
// return 401 not authorised if token is null or invalid
return throwError('Unauthorised');
}
}
// get student by id
if (request.url.match(/\/api\/students\/\d+$/) && request.method === 'GET') {
// check for fake auth token in header and return student if valid, this security is implemented server side in a real application
if (request.headers.get('Authorization') === 'Bearer fake-jwt-token') {
// find student by id in students array
let urlParts = request.url.split('/');
let id = parseInt(urlParts[urlParts.length - 1]);
let matchedStudents = students.filter(student => { return student.id === id; });
let student = matchedStudents.length ? matchedStudents[0] : null;
return of(new HttpResponse({ status: 200, body: student }));
} else {
// return 401 not authorised if token is null or invalid
return throwError('Unauthorised');
}
}
// create student
if (request.url.endsWith('/api/students') && request.method === 'POST') {
// get new student object from post body
let newStudent = request.body;
// validation
let duplicateStudent = students.filter(student => { return student.studentname === newStudent.studentname; }).length;
if (duplicateStudent) {
return throwError('Studentname "' + newStudent.studentname + '" is already taken');
}
// save new student
newStudent.id = students.length + 1;
students.push(newStudent);
localStorage.setItem('students', JSON.stringify(students));
// respond 200 OK
return of(new HttpResponse({ status: 200 }));
}
// delete student
if (request.url.match(/\/api\/students\/\d+$/) && request.method === 'DELETE') {
if (request.headers.get('Authorization') === 'Bearer fake-jwt-token') {
// find student by id in students array
let urlParts = request.url.split('/');
let id = parseInt(urlParts[urlParts.length - 1]);
for (let i = 0; i < students.length; i++) {
let student = students[i];
if (student.id === id) {
// delete student
students.splice(i, 1);
localStorage.setItem('students', JSON.stringify(students));
break;
}
}
// respond 200 OK
return of(new HttpResponse({ status: 200 }));
} else {
return throwError('Unauthorised');
}
}
return next.handle(request);
}))
.pipe(materialize())
.pipe(delay(500))
.pipe(dematerialize());
}
}
export let fakeBackendProvider = {
provide: HTTP_INTERCEPTORS,
useClass: FakeBackendInterceptor,
multi: true
};
Angular 6 JWT Interceptor
files & folders Path: /src/spp/_helpers/jwt.interceptor.ts
import { Injectable } from '@angular/core';
import { HttpRequest, HttpHandler, HttpEvent, HttpInterceptor } from '@angular/common/http';
import { Observable } from 'rxjs';
@Injectable()
export class JwtInterceptor implements HttpInterceptor {
intercept(request: HttpRequest, next: HttpHandler): Observable<HttpEvent> {
let activeStudent = JSON.parse(localStorage.getItem('activeStudent'));
if (activeStudent && activeStudent.token) {
request = request.clone({
setHeaders: {
Authorization: `Bearer ${activeStudent.token}`
}
});
}
return next.handle(request);
}
}
Angular 6 Student Model
files & folders Path: /src/spp/_models/student.ts
export class Student {
id: number;
studentname: string;
password: string;
studFname: string;
studLname: string;
}
Angular 6 Alert Service
files & folders Path: /src/spp/_services/alert.service.ts
import { Injectable } from '@angular/core';
import { Router, NavigationStart } from '@angular/router';
import { Observable, Subject } from 'rxjs';
@Injectable()
export class AlertService {
private subject = new Subject();
private keepAfterNavigationChange = false;
constructor(private router: Router) {
// clear alert alert-msg on route change
router.events.subscribe(event => {
if (event instanceof NavigationStart) {
if (this.keepAfterNavigationChange) {
// only keep for a single location change
this.keepAfterNavigationChange = false;
} else {
// clear alert
this.subject.next();
}
}
});
}
success(alert-msg: string, keepAfterNavigationChange = false) {
this.keepAfterNavigationChange = keepAfterNavigationChange;
this.subject.next({ type: 'success', text: alert-msg });
}
error(alert-msg: string, keepAfterNavigationChange = false) {
this.keepAfterNavigationChange = keepAfterNavigationChange;
this.subject.next({ type: 'error', text: alert-msg });
}
getMessage(): Observable {
return this.subject.asObservable();
}
}
More Details of the Angular 6 Angular 6 Introduction Tutorial features of angular 6.0
Angular 6 Examples
There are the Angular 6 Step By Step Example and Learning AngularJS
- Angular 6 CRUD Tutorial Example From Scratch
- Angular 6 and ASP.NET Core 2.0 Web API Example
- Angularjs 6 User Registration and Login Authentication
- Angular 6 applications – Insert, Fetch , Edit – update , Delete Operations
Angular 6 Login And Registration Module
There are the available for AngularJS 6.0 Part1, Part2 and Part3 Step By step Example and source code available.
- Angular 6 applications – Insert, Fetch , Edit – update , Delete Operations
- Angular 6 CRUD
- Angular 6 and ASP.NET Core 2.0 Web API
- Angular 6 features
- Angular 6 Form Validation
- Angular 6 – User Registration and Login
- Angularjs 6 User Registration and Login Authentication
- Angular 6 CLI Installation Tutorial With Example
- Angular 6 Toast Message Notifications From Scratch
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