Lesson 16/100

Tutorials Angular Tutorial

Attribute Directives

Attribute 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 16 of 100

Attribute Directives

Setup & ComponentsRouting HTTP RxState & PerfShip & Projects

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

What is this?

Attribute 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: `<!-- Attribute 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 Attribute Directives simply. You ran a small Angular demo. You know one pitfall.

Attribute Directives in AngularVerse

Your team applies attribute 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
Attribute Directives – Change appearance/behavior (e.g., ngClass, ngStyle)?
Short answer: Examples: &lt;!-- *ngIf --&gt; &lt;div *ngIf=&quot;user.isLoggedIn&quot;&gt;Welcome, {{ user.name }}&lt;/div&gt; &lt;!-- *ngFor --&gt; &lt;li *ngFor=&quot;let item of items&quot;&gt;{{ item }}&lt;/li&gt; Re…
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?
Short answer: pplies CSS class when link's route is ctive ✅ Example: &lt;a routerLink=&quot;/home&quot; routerLinkActive=&quot;active-link&quot;&gt;Home&lt;/a&gt; ctive-link is applied when the current route is /home. Ex…
Mid PDF Detailed
Use Angular directives like ngModel and #form="ngForm" in template.?
Short answer: ✅ Example code &lt;form #myForm=&quot;ngForm&quot; (ngSubmit)=&quot;onSubmit(myForm)&quot;&gt; &lt;input name=&quot;username&quot; ngModel required minlength=&quot;4&quot; /&gt; &lt;button type=&quot;submit…
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?
Short answer: Directive Purpose routerLink Binds a component to a route routerLinkAct ive Applies CSS class when link's route is active ✅ Example: &lt;a routerLink=&quot;/home&quot; routerLinkActive=&quot;active-link&quo…
Mid PDF Detailed
Usage in Template: <p appHighlight>This will be highlighted!</p> ✅ Real-Time Use Case: ● Custom tooltip, hover effect, auto-focus, etc. directives?
Short answer: These are attribute directives used to dynamically set styles or CSS classes. Explain a bit more ➤ ngClass: Apply CSS classes &lt;div [ngClass]=&quot;{'active': isActive, 'disabled': !isActive}&quot;&gt;&lt…
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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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