Front-End Development Trends in 2025: What Every Developer Should Know
27 August 2025
Dependency Rule in Clean Architecture: The Golden Principle
The Dependency Rule states:
“Source code dependencies can only point inwards. Nothing in an inner circle can know anything at all about something in an outer circle.”
Why it matters:
- Keeps business rules independent of frameworks.
- Prevents tight coupling.
- Allows easy replacement of tools (databases, UIs, APIs).
Example:
- If your Use Case layer imports React, you’re violating the rule.
- Instead, pass interfaces/adapters inward, keeping React or Angular confined to the outer layer.
Practical analogy:
Think of the core business rules as the engine. Frameworks (UI, DB, APIs) are the wheels. Wheels can change, but the engine remains the same.
