Can you explain what weak coupling between system components means?

Loose coupling between system components means that the components depend on each other minimally. This increases flexibility, makes maintenance and testing easier, as changes in one component are less likely to affect others.

Example: if module A interacts with module B through a well-defined interface or API, rather than directly using B's internal details, then the connection is considered loose. In Node.js, this can be implemented through events, promises, or dependency injection, which reduces tight coupling between modules.