Lesson 15/100

Tutorials Angular Tutorial

Structural Directives

Structural Directives: 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 15 of 100

Structural Directives

Setup & ComponentsRouting HTTP RxState & PerfShip & Projects

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

What is this?

Structural Directives 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: `<!-- Structural Directives -->`,
})
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 Structural Directives simply. You ran a small Angular demo. You know one pitfall.

Structural Directives in AngularVerse

Your team applies structural directives 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
In your route: const routes: Routes = [ { path: 'admin', loadChildren: () => import('./admin/admin.module').then(m => m.AdminModule) } ]; ⚡ Only loads AdminModule when user navigates to /admin. routerLinkActive directives? Directive Purpose routerLink Binds a component to a route routerLinkAct ive
pplies CSS class when link's route is ctive ✅ Example: &lt;a routerLink="/home" routerLinkActive="active-link"&gt;Home&lt;/a&gt; ctive-link is applied when the current route is /home. ngular? You define route parameters…
Mid PDF Detailed
Use Angular directives like ngModel and #form="ngForm" in template.?
✅ Example: &lt;form #myForm="ngForm" (ngSubmit)="onSubmit(myForm)"&gt; &lt;input name="username" ngModel required minlength="4" /&gt; &lt;button type="submit"&gt;Submit&lt;/button&gt; &lt;/form&gt; onSubmit(form: NgForm)…
Mid PDF Detailed
What are directives in Angular? Can you give examples?
Answer: Directives are instructions in the DOM. They help Angular extend HTML's capabilities. Types of Directives: What interviewers expect A clear definition tied to Angular in Angular projects Trade-offs (performance,…
Mid PDF Detailed
Attribute Directives – Change appearance/behavior (e.g., ngClass, ngStyle)?
Examples: &lt;!-- *ngIf --&gt; &lt;div *ngIf="user.isLoggedIn"&gt;Welcome, {{ user.name }}&lt;/div&gt; &lt;!-- *ngFor --&gt; &lt;li *ngFor="let item of items"&gt;{{ item }}&lt;/li&gt; Real-Time Example: In a to-do app, *…
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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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