Angular Advanced Guide 🌟
Welcome to the Angular Advanced Guide! Whether you're a seasoned Angular developer or just starting out, this page will help you dive deeper into the world of Angular.
Key Features
- Dependency Injection 🎯: Learn how to effectively use dependency injection to manage dependencies in your Angular applications.
- Routing 🗺️: Understand how to implement dynamic routing in your Angular applications.
- Forms 📝: Discover how to handle forms in Angular, including reactive forms and template-driven forms.
- State Management 🧠: Explore different state management solutions for Angular applications, such as NgRx and Akita.
Quick Links
Dependency Injection
Dependency Injection (DI) is a design pattern that allows for decoupling of dependencies from the classes that use them. This makes your code more modular and easier to test.
Example
import { Injectable } from '@angular/core';
@Injectable({
providedIn: 'root'
})
export class UserService {
constructor(private http: HttpClient) {}
getUser(id: number) {
return this.http.get(`/api/users/${id}`);
}
}
Routing
Angular's routing allows you to define navigation paths for your application. You can create nested routes, handle route parameters, and even redirect users to different paths.
Example
const routes: Routes = [
{ path: '', redirectTo: '/home', pathMatch: 'full' },
{ path: 'home', component: HomeComponent },
{ path: 'about', component: AboutComponent },
{ path: 'contact', component: ContactComponent },
{ path: 'user/:id', component: UserComponent }
];
Forms
Angular provides two ways to handle forms: template-driven and reactive forms. Template-driven forms are easier to get started with, while reactive forms offer more flexibility and are better suited for complex forms.
Example
<form [formGroup]="userForm">
<input type="text" formControlName="name">
<input type="email" formControlName="email">
<button type="submit" [disabled]="!userForm.valid">Submit</button>
</form>
State Management
State management is crucial for large-scale Angular applications. NgRx and Akita are two popular state management libraries that help you manage the state of your application in a scalable and testable way.
Example
import { createSelector, createFeatureSelector } from '@ngrx/store';
const selectUser = createFeatureSelector<User>('user');
const selectUserDetails = createSelector(
selectUser,
user => user.details
);
Stay tuned for more advanced Angular tutorials and guides! 🚀