What can you use to communicate between parent and child components in LWC?

In Lightning Web Components (LWC), custom events are the primary mechanism for communication between parent and child components. When a child component needs to notify its parent about an event or a change, it can dispatch a custom event. This event can carry information (using event detail) that the parent can handle. The parent component can then listen for this custom event and respond accordingly by defining an event handler function.

Using custom events allows for clear communication, ensuring that child components remain decoupled from their parents, which enhances reusability and maintainability. This approach aligns with the component-based architecture of LWC, where components interact through well-defined interfaces rather than direct references.

While global event listeners and shared variables might be used for component communication, they are not typically leveraged for parent-child relationships within the scope of LWC. Static resources do not apply to this context as they are used for storing files and assets shared across components, not for event communication.