Ionic Developer Interview Questions and Answers

ionViewWillLeave and ionViewDidLeave

• ionViewWillLeave is triggered when the page is about to leave the view

• ionViewDidLeave is triggered after the page has left the view

• Both events are part of the ionView lifecycle

Style sanitization is the process of removing potentially harmful CSS styles from user input.

• It helps prevent cross-site scripting (XSS) attacks.

• It removes styles that could interfere with the layout or functionality of the application.

• Ionic uses a built-in sanitizer to remove unsafe styles.

• Developers can also create custom sanitizers to meet specific needs.

ngIf is used to conditionally render elements while ngSwitch is used to render elements based on a specific value.

• ngIf evaluates a boolean expression and renders the element if it is true

• ngSwitch evaluates a value and renders the element that matches the value

• ngSwitch is more efficient when there are multiple conditions to check

Oops concept refers to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation details and showing only the necessary features.