How does AngularJS handle large-scale modular dependency isolation in enterprise architecture?

AngularJS achieves dependency isolation using feature-based modules, strict DI boundaries, and controlled service exposure through shared modules.

In enterprise AngularJS systems, module isolation prevents tight coupling and cascading failures. Each feature module encapsulates its own controllers, services, and directives. Shared functionality is extracted into core/shared modules. The injector ensures singleton services per module graph, but architectural discipline is required to avoid accidental cross-module dependency leakage. Proper isolation reduces regression risk and improves maintainability in large codebases.