Lesson 17/100

Tutorials Angular Tutorial

Pipes Built-in and Custom

Pipes Built-in and Custom: free step-by-step lesson with examples, common mistakes, and interview tips — part of Angular Tutorial on Toolliyo Academy.

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Angular Tutorial · Lesson 17 of 100

Pipes Built-in and Custom

Setup & ComponentsRouting HTTP RxState & PerfShip & Projects

Setup & Components · 1 — UI · ~6 min · Components and Templates

What is this?

Pipes Built-in and Custom is a core UI building block: components, templates, DI, or pipes.

Why should you care?

Almost every screen is a composition of these fundamentals.

See it live — copy this example

Run examples in an Angular CLI project (ng serve). Prefer standalone components and TypeScript strict mode.

@Component({
  standalone: true,
  selector: 'app-demo',
  template: `<!-- Pipes Built-in and Custom -->`,
})
export class DemoComponent {}

What happened?

  • Start from a standalone component and add only what the topic needs.
  • Follow the steps below — typing the code yourself is the fastest way to learn.

Practice next

  1. Reproduce the snippet in an Angular CLI app.
  2. Change one binding or route and re-serve.
  3. Note one mistake you almost made.
  4. Extract a service.
  5. Add a trivial unit test later.

Remember

You can explain Pipes Built-in and Custom simply. You ran a small Angular demo. You know one pitfall.

Pipes Built-in and Custom in AngularVerse

Your team applies pipes built-in and custom on an admin UI.

Outcome: A concrete next coding step exists.

Interview prep for this lesson

Practice these questions aloud after reading—each links to a full structured answer.

Mid PDF Detailed
How do you structure Angular projects for scalability? ● Feature-based folder structure: Organize by features rather than by type. /src/app /products /components /services /models products.module.ts /orders /shared /core ● Core module: For singleton services used app-wide (e.g., authentication, logging). ● Shared module: For shared components, pipes, and directives reused across the
Answer: pp. Lazy load feature modules: Load modules on demand to improve startup time. Use state management (e.g., NgRx) when app state becomes complex. Adopt consistent routing with child routes. What interviewers expec…
Mid PDF Detailed
Add <router-outlet></router-outlet> in the template. ✅ Example: // app-routing.module.ts const routes: Routes = [ { path: 'home', component: HomeComponent }, { path: 'about', component: AboutComponent } ]; @NgModule({ imports: [RouterModule.forRoot(routes)], exports: [RouterModule] }) export class AppRoutingModule {} The RouterModule is a built-in Angular module that provides routing directives, services,
nd configuration to manage navigation between views. ✅ Imports in App: import { RouterModule } from '@angular/router'; You use it with RouterModule.forRoot() (for root module) or RouterModule.forChild() (for feature modu…
Junior PDF Detailed
What is a CustomEvent in Angular, and how is it used?
CustomEvent is a native JavaScript event that allows sending custom data. In Angular, used in event emitters to pass data from child to parent components. Angular wraps this with @Output() and EventEmitter. Example: @Out…
Mid PDF Detailed
How do you optimize Angular applications for faster load times? ● Use Ahead-of-Time (AOT) compilation for faster rendering. ● Enable production builds (ng build --prod) with optimizations: ○ Minification ○ Tree shaking ○ Dead code elimination ● Use lazy loading for feature modules. ● Bundle analysis: Use tools like source-map-explorer to find large bundles. ● Use Angular’s built-in caching and service workers (via Angular PWA) for offline
nd faster repeat loads. Optimize images and assets (compress, lazy load). Use OnPush change detection for components to reduce unnecessary UI updates. Avoid memory leaks by unsubscribing from observables. Use trackBy fun…
Mid PDF Detailed
How do you implement custom form validation in
ngular? Create a validator function returning an error object or null. ✅ Example (Custom validator checking forbidden name): function forbiddenNameValidator(nameRe: RegExp): ValidatorFn { return (control: AbstractControl…
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Angular Tutorial
Course syllabus

Angular Tutorial

Setup
Components and Templates
Routing and Forms
HTTP and APIs
RxJS and Signals
State Management
UI and Performance
Realtime and Scale
Security Testing Deploy
Projects
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