I am faced with a situation where I have two components, CompA and CompA5, that are 3 or 4 levels apart. I need to establish a means of communication between these components.
For instance, I want component CompA to send an event to CompA5, receive some data in return, wait for this data, and then take further action based on it. Is there a way to create a service or follow best practices to achieve this desired behavior?
To enhance component communication between sibling or unrelated components, the ideal approach is to establish a shared service.
This shared service will contain a variable of type Subject/BehaviorSubject. Since it is a shared service, both components will inject it as a dependency.
Any changes to the value of this Subject/BehaviorSubject can be made by invoking the next method and passing the desired data to be received by the other component.
The other component will be listening for changes by subscribing to this Subject/BehaviorSubject, automatically receiving the updated data.
For a simple demonstration, check out this StackBlitz Link.
When it comes to learning about Angular.io, one of the best resources is their original documentation example on how parents and children communicate via a service. You can check it out here.
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