Describe a use case for a custom directive in AngularJS that manipulates DOM elements based on specific conditions.
- Building a Form Validation Directive
- Creating a Tooltip Directive
- Implementing Infinite Scrolling Directive
- Implementing Lazy Loading with a Directive
A use case for a custom directive in AngularJS that manipulates DOM elements based on specific conditions could be "Implementing Lazy Loading with a Directive." In this scenario, you can create a custom directive to load content dynamically as the user scrolls, improving the performance of the web page. Custom directives in AngularJS provide a powerful mechanism for extending the functionality of the framework to meet specific requirements. Understanding how to create and use custom directives is crucial for advanced AngularJS development.
How do you define a new module in AngularJS?
- angular.module() method
- defineModule() statement
- module.create() function
- ng-create-module directive
In AngularJS, you define a new module using the angular.module() method. This method allows you to create a module or retrieve an existing one. Modules play a crucial role in structuring AngularJS applications, and knowing how to define them is essential for organizing and managing the components of your application effectively.
What role does scope play in AngularJS's two-way data binding mechanism?
- Scope acts as a mediator
- Scope synchronizes data
- Scope triggers events
- Scope updates the DOM
In AngularJS's two-way data binding mechanism, the Scope plays the role of synchronizing data between the model and the view. Any changes made in the model or the view are automatically reflected in the other, ensuring real-time updates. This bidirectional data flow simplifies development and enhances the responsiveness of AngularJS applications.
How does the ng-switch directive enhance decision-making capabilities in the view?
- It allows the use of switch statements in the view.
- It conditionally renders content based on the evaluated expression.
- It dynamically switches between different views based on the provided conditions.
- It replaces if-else conditions with a more efficient decision-making mechanism.
The ng-switch directive in AngularJS enhances decision-making capabilities in the view by dynamically switching between different views based on the provided conditions. It acts as a more expressive and efficient alternative to using multiple if-else conditions in the view. With ng-switch, the view can adapt and display different content based on the evaluated expressions, providing a cleaner and more readable way to handle complex conditional rendering in AngularJS applications.
_________ directive in AngularJS allows you to manipulate CSS classes on an element based on scope data.
- ng-bind
- ng-class
- ng-model
- ng-style
The ng-class directive in AngularJS allows you to dynamically manipulate CSS classes on an HTML element based on the data in the scope. It is commonly used for conditional styling, where the presence or absence of a class depends on certain conditions. Understanding how to use ng-class is crucial for creating dynamic and responsive user interfaces in AngularJS applications.
The __________ directive is essential for rendering lists or tables dynamically in AngularJS.
- ng-display
- ng-dynamic
- ng-list
- ng-repeat
The ng-repeat directive is essential for rendering lists or tables dynamically in AngularJS. It iterates over a collection of items and generates HTML elements for each item. This powerful directive is commonly used to display data from arrays or objects, making it a key feature for building dynamic and responsive user interfaces in AngularJS applications.
When integrating with an external API in AngularJS, what format is typically used for data exchange?
- HTML
- JSON
- XML
- YAML
When integrating with an external API in AngularJS, the typical format used for data exchange is JSON (JavaScript Object Notation). JSON is a lightweight and readable data interchange format that is easy to work with in JavaScript applications. AngularJS developers often parse JSON responses from APIs and format data as JSON when making requests, ensuring compatibility and efficient data transfer.
How does AngularJS handle data binding within expressions?
- Dynamic data binding
- Event-based data binding
- One-time data binding
- Two-way data binding
AngularJS handles data binding within expressions through two-way data binding. Two-way data binding enables automatic synchronization of the model and view, allowing changes in one to instantly reflect in the other and vice versa. This feature simplifies the development process by reducing the need for manual updates and enhancing the responsiveness of AngularJS applications. Understanding how two-way data binding works is crucial for efficient data management in AngularJS.
The __________ feature in AngularJS allows for dynamic loading and rendering of views based on application state.
- Data Binding
- Dependency Injection
- Modules
- Routing
The Routing feature in AngularJS allows for dynamic loading and rendering of views based on application state. AngularJS provides a powerful routing mechanism that enables developers to define routes, associate them with templates and controllers, and navigate between different views. Proper usage of routing enhances the structure and navigation flow of AngularJS applications, making it a fundamental concept for building single-page applications (SPAs).
In advanced AngularJS applications, _________ is used for controller aliasing to enhance readability.
- as-controller
- controller-as
- ng-alias
- ng-controller
In advanced AngularJS applications, "controller-as" syntax is used for controller aliasing to enhance readability. It allows you to avoid scope-related issues and makes it clear which controller is associated with a particular section of the view. The "controller-as" syntax is considered a best practice for maintaining clean and readable code in AngularJS.