How to communicate between sibling components in Angular?

There are several ways to communicate between sibling components in Angular:

1. Using a shared service: You can create a shared service that both components can inject and use to share data. The shared service can have methods to set and get data, and both components can subscribe to any changes in the data.
2. Using a subject or BehaviorSubject in a shared service: You can create a subject or a BehaviorSubject in a shared service and use it to share data between components. A subject is a special type of observable that allows values to be multicasted to many Observers. A BehaviorSubject is a type of subject that holds the current value and emits the last value to new subscribers.
3. Using @Input and @Output decorators: You can use the @Input and @Output decorators to pass data from a parent component to its children and vice versa. To communicate between siblings, you can use the @Input and @Output decorators in conjunction with a shared parent component.
4. Using the Angular Router: You can pass data between components using the Angular Router. You can use the data property of the ActivatedRoute to pass data to a component when navigating to it.

Choose the method that best fits your use case, and make sure to properly manage the communication to avoid tight coupling between components and ensure good application performance.