When using a Route Resolver, what impact does it have on the navigation process?
- Cancels navigation if data is missing
- Delays navigation until data is ready
- Improves navigation performance
- No impact
Using a Route Resolver delays navigation until data is ready, ensuring that the component receives the resolved data.
To handle browser-specific tasks in an Angular Universal application, you should check if the code is running on the server or the browser using the _____ function.
- checkPlatform
- detectPlatform
- isPlatformBrowser
- isServerSide
In Angular Universal, you should check if the code is running on the server or the browser using the isPlatformBrowser function.
To define custom validators in reactive forms, you need to implement a function that returns a/an _____ .
- Array
- Object
- Observable
- ValidatorFn
In reactive forms, custom validators are implemented as functions that return a ValidatorFn, which is used to validate form controls.
The _____ event is emitted when a navigation action starts.
- NavigationCancel
- NavigationEnd
- NavigationError
- NavigationStart
The blank should be filled with NavigationStart. The NavigationStart event is emitted when a navigation action starts in Angular.
The _____ Subject will emit its most recent value to all subscribers whenever they subscribe.
- Async
- Behavior
- Multicast
- Replay
The Behavior Subject will emit its most recent value to all subscribers whenever they subscribe. It stores and shares the last emitted value among subscribers.
To selectively apply styles based on component logic, you can use ngClass binding in Angular.
- ngFor
- ngIf
- ngStyle
- ngSwitch
In Angular, the ngClass binding is used to selectively apply styles based on component logic by dynamically adding or removing CSS classes.
How can you ensure that a service provides a single, shared instance across an entire Angular application?
- Using a local provider in a component
- Using providedIn property
- Using the @Injectable() decorator
- Using the @Singleton() decorator
To ensure a service provides a single, shared instance across an entire Angular application, you can use the providedIn property in the @Injectable decorator and specify a module where the service should be provided. This ensures a singleton instance.
In Angular, the _____ method is used to assert that a certain expectation is met in tests.
- beforeEach
- describe
- expect
- it
The correct term to fill in the blank is expect. In Angular testing, you use the expect method from Jasmine to assert that a specific expectation is met during tests.
How can you create a custom validator that depends on multiple form controls?
- Combine validators in a custom validation function
- Use a directive for form validation
- Use a reactive approach
- Use a template-driven approach
In Angular, you can create a custom validator that depends on multiple form controls by combining validators in a custom validation function. This allows you to implement complex validation logic that relies on the values of multiple form controls.
How can you override a provider for a service in a specific component or module?
- Using import and export statements
- Using providedIn property in @Injectable()
- Using providedIn property in @NgModule()
- Using the @Optional() decorator
To override a provider for a service in a specific component or module, you can use the providedIn property in @NgModule() to specify the provider at the module level.