Angular Best Practices

Organize components based on functionality. Each component should encapsulate its own logic, template, and styles.

src/
  app/
    components/
      header/
      footer/
      user-profile/

Use services to handle business logic and data retrieval. This promotes reusability and separation of concerns.

import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root',
})
export class UserService {
  getUser() {
    // Logic to get user data
  }
}

Consider using state management libraries like NgRx for complex applications. This helps in managing state in a predictable manner.

Optimize performance using lazy loading, OnPush change detection strategy, and trackBy in ngFor to minimize DOM manipulations.

<div *ngFor="let item of items; trackBy: trackById">
  {{ item.name }}
</div>

Write unit tests for components and services using Jasmine and Karma. Use Angular TestBed for setup.

import { ComponentFixture, TestBed } from '@angular/core/testing';
import { MyComponent } from './my.component';

describe('MyComponent', () => {
  let component: MyComponent;
  let fixture: ComponentFixture;

  beforeEach(async () => {
    await TestBed.configureTestingModule({
      declarations: [ MyComponent ]
    })
    .compileComponents();
  });

  beforeEach(() => {
    fixture = TestBed.createComponent(MyComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

  it('should create', () => {
    expect(component).toBeTruthy();
  });
});

Implement security practices such as input validation, sanitization, and using Angular's built-in security features to prevent XSS attacks.