Angular emphasizes the importance of component communication, and there are various approaches to achieve this within your team or project. In this particular case, using setTimeout is not recommended as it only triggers once and may not be efficient compared to setInterval which calls at repetitive intervals.
This means that if you interact with a checkbox, there could be a delay of almost 5 seconds before receiving feedback on the status change in the exposed or closed footer.
Instead, consider utilizing these four primary methods for binding data between components:
Services:
Create a service to facilitate communication between components. Services can be injected into multiple components, making them highly reusable across the application.
Simply create a Service and provide it in your module where necessary.
Create an Observable in the service and subscribe to it in components requiring access to the information.
Learn more about Observables at: https://angular.io/guide/observables
An example of Delayed Sequence in the provided link may align with your requirements.
NgRx:
Implementing Redux (NgRx) offers an advanced method for handling communication between components by ensuring immutable and reliable data management.
If not currently utilized, do not introduce NgRx solely for this purpose. By dispatching actions related to showing or hiding the footer, you can then subscribe to the stored data elsewhere.
Explore the store further here:
@Inputs and @Outputs:
For nested components, utilize Inputs and Outputs to transmit data between them. For instance, a "page" component containing the footer and checkbox could pass data up and down through bindings.
Exercise caution with this approach to ensure data integrity is maintained throughout the application.
Find additional information on Inputs, Outputs, and overall component interaction here:
https://angular.io/guide/component-interaction
Event Bus:
An Event Bus could technically be employed to send notifications within the application, such as displaying the footer. However, this may not always be the optimal solution.
Event Bus functionality is typically suited for notification purposes when the origin of the action is less relevant than its occurrence.
Understand more about Event Emitters in Angular here: https://angular.io/api/core/EventEmitter