What is the use case of custom directives in Angular

Question

With the help of code and example tell me What is the use case of custom directives in Angular?

Answer 1

Custom directives are used to encapsulate reusable behaviors and manipulate the DOM dynamically.

Common Use Cases:

Custom Styling & Effects – Apply styles dynamically (e.g., highlighting text).

<p appHighlight>Hover to highlight!</p>

Event Handling – Listen to events like clicks, hovers, or keypresses.

<button appClickTracker>Track Clicks</button>

Form Validation – Enforce custom validation rules.

<input type="text" appCustomValidator />

Conditional Rendering – Show/hide elements dynamically.

<div *appIf="isVisible">Visible Content</div>