Angular Interview Practice

What do structural directives do in Angular?

1. Change styles of elements

2. Directly manipulate event handling

3. Change the DOM structure by adding or removing elements

4. Enhance data binding

The correct answer is: Change the DOM structure by adding or removing elements

Structural directives in Angular are used primarily to alter the structure of the DOM by adding or removing elements based on certain conditions. They enable developers to dynamically display sections of a template based on defined criteria such as visibility, repetition, or even conditional rendering. For example, directives such as *ngIf, *ngFor, and *ngSwitch modify the DOM tree based on their associated conditions or collections, allowing for a responsive application interface that adapts to various states. Other functionalities you might find in Angular, such as changing styles or handling events, are not the focus of structural directives. Instead, those responsibilities align more closely with attribute directives and components. While structural directives significantly enhance the flexibility of templates through dynamic DOM manipulation, actions related to the enhancement of data binding primarily fall under other Angular features, as they do not directly deal with the addition or removal of DOM elements or structures.