Switching from the Login component to the User Account component in the header of Angular 2+ upon successful login

Question

Switching from the Login component to the User Account component in the header of Angular 2+ upon successful login

I recently embarked on building an Angular2+ App after just beginning to learn Angular a week ago.

Here is my planned structure: - index.html - AppComponent (app-root) - Header Component (header) - Signup Component (signup)

The SignupComponent will function as a modal.

Upon successful login, I aim to replace the Signup Account with the User Component, which will be a drop-down menu containing multiple links (such as Account and Logout).

My proposed solution involves emitting an event from the Signup Component to the Header component upon successful login.

In response to this event, the Header component will transition to the User Component, hiding the Signup Component Div in the process.

The User Component should include an Auth Guard to protect the links within the drop-down menu.

I have a couple of questions:

How do I route from the Signup Modal back to index.html with the necessary changes? Do I need to refresh index.html to load the account component? How can I navigate to index.html so that it displays the new User Component instead of the signup component?
Is this approach correct? If not, what would be the optimal way to accomplish this in Angular 2+?

angular typescript frontend

Answer 1

Answer №1

Below are some helpful tips for working with angular 4.3. It is recommended not to place your html code directly into the index.html file, as it's not considered a best practice. Instead, utilize the APP component as the primary component where you can house all of your html content. With the exception of header (containing login/logout links) and footer, remove other html elements and make use of the router-outlet to create a single page application.

Assuming you have already set up a login/SignIn component and service. Start by defining a variable in the login service and initializing it to false in the constructor. This variable will be toggled between true/false based on user login/logout actions.

Next step involves injecting the login service into the app component and initializing it within the constructor function.

Finally, in the app component's html file where the login/logout links are located, utilize ngIf directive to control the visibility of these links based on the status of the isloggedin variable from the login service.

Sample code snippets:

Login Service

export class LoginService{
    isLoggedIn : boolean;
    constructor(private _http: Http){
        this.isLoggedIn = false;
    }

App Component HTML

<li *ngIf="!loginService.isLoggedIn"> <a routerLink="login">Login</a> </li>
<li *ngIf="!loginService.isLoggedIn"> <a routerLink="register">Register</a> </li>
<li *ngIf="loginService.isLoggedIn"> <a routerLink="logout">Logout</a> </li>

App Component

import { LoginService } from './login.service';

export class AppComponent {
constructor(private loginService: LoginService){
}

Upon logout, simply clear the local storage and update the value of isLoggedIn to false;

Answer 2

Below are some helpful tips for working with angular 4.3. It is recommended not to place your html code directly into the index.html file, as it's not considered a best practice. Instead, utilize the APP component as the primary component where you can house all of your html content. With the exception of header (containing login/logout links) and footer, remove other html elements and make use of the router-outlet to create a single page application.

Assuming you have already set up a login/SignIn component and service. Start by defining a variable in the login service and initializing it to false in the constructor. This variable will be toggled between true/false based on user login/logout actions.

Next step involves injecting the login service into the app component and initializing it within the constructor function.

Finally, in the app component's html file where the login/logout links are located, utilize ngIf directive to control the visibility of these links based on the status of the isloggedin variable from the login service.

Sample code snippets:

Login Service

export class LoginService{
    isLoggedIn : boolean;
    constructor(private _http: Http){
        this.isLoggedIn = false;
    }

App Component HTML

<li *ngIf="!loginService.isLoggedIn"> <a routerLink="login">Login</a> </li>
<li *ngIf="!loginService.isLoggedIn"> <a routerLink="register">Register</a> </li>
<li *ngIf="loginService.isLoggedIn"> <a routerLink="logout">Logout</a> </li>

App Component

import { LoginService } from './login.service';

export class AppComponent {
constructor(private loginService: LoginService){
}

Upon logout, simply clear the local storage and update the value of isLoggedIn to false;

Answer 3

Answer №2

Check out these resources for Angular routing: https://angular.io/docs/ts/latest/tutorial/toh-pt5.html

Also, take a look at the ngIf directive in Angular: https://angular.io/docs/ts/latest/guide/structural-directives.html#!#ngIf

To control what is displayed on your page, you can create a boolean variable like isClientLogged = true/false and use an ngIf statement to show or hide content accordingly. If you need to redirect part of your page to another location, utilize Angular routes.

Answer 4

Check out these resources for Angular routing: https://angular.io/docs/ts/latest/tutorial/toh-pt5.html

Also, take a look at the ngIf directive in Angular: https://angular.io/docs/ts/latest/guide/structural-directives.html#!#ngIf

To control what is displayed on your page, you can create a boolean variable like isClientLogged = true/false and use an ngIf statement to show or hide content accordingly. If you need to redirect part of your page to another location, utilize Angular routes.

Switching from the Login component to the User Account component in the header of Angular 2+ upon successful login

Answer №1

Answer №2

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