angular-expert

Angular Expert (2026 Edition)

English | Bahasa Indonesia

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English

Orchestration & Integration

• typescript-expert: Strict TypeScript typing and decorators in Angular 19+.
• api-design-expert: REST and GraphQL client architecture with Angular HttpClient.
• e2e-testing-expert: Playwright and Cypress end-to-end testing for Angular apps.
• global-a11y-i18n-expert: Angular localized translations (@angular/localize) and accessibility compliance.
• ci-cd-devops-architect: Dockerizing and deploying Angular SSR applications.

Description

Production-ready guide for building scalable, enterprise-grade web applications using Angular 19+. Covers modern Standalone Components (NgModule-free), fine-grained Signals (signal(), computed(), effect()), Signal-based inputs/outputs, NgRx SignalStore, deferrable views (@defer), SSR with Event Replay hydration, and Angular Material 3.

Trigger Conditions

• Building or refactoring enterprise-scale Angular applications.
• Migrating legacy Angular (NgModules / RxJS heavy) to Angular 19+ Standalone Components & Signals.
• Implementing state management with NgRx SignalStore.
• Configuring Angular SSR with hydration and deferrable views (@defer).

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Core Architecture & Modern Patterns

1. Standalone Component with Signals & Signal Inputs

import { Component, signal, computed, input, output, ChangeDetectionStrategy } from '@angular/core';
import { CommonModule } from '@angular/common';

export interface UserItem {
  id: string;
  name: string;
  role: 'admin' | 'member';
}

@Component({
  selector: 'app-user-card',
  standalone: true,
  imports: [CommonModule],
  template: `
    <div class="user-card" [class.admin]="isAdmin()">
      <h3>{{ user().name }}</h3>
      <p>Role: {{ user().role }}</p>
      <button (click)="onRoleChange()">Promote</button>
    </div>
  `,
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class UserCardComponent {
  // Signal inputs & outputs (Angular 19+)
  user = input.required<UserItem>();
  roleUpdated = output<string>();

  isAdmin = computed(() => this.user().role === 'admin');

  onRoleChange() {
    this.roleUpdated.emit(this.user().id);
  }
}