Reuse makes a software element applicable across multiple contexts without rewriting it. In Angular applications, poor reuse often appears as duplicated routing guards, interceptors, or business-logic directives. section 1.4.3
Duplication increases maintenance cost and prevents safe refactoring: changing one guard may require changing every copy. Reusable building blocks instead centralize behavior and reduce preventable bugs. section 1.4.3
Modern Angular expands where reusable behavior can live:
- Use the inject function to access services, configuration, or other dependency-injection tree instances from functions, rather than requiring every consumer to be a class with @Injectable. section 1.2.1
- Use standalone applications and building blocks when NgModules would otherwise encapsulate and share functionality through additional framework structure. section 1.2.1
- Reuse directives for business logic that makes templates more dynamic, while sharing application state through RxJS or compatible state-management solutions. section 1.4.3 section 1.2.1
HRMS authorization
An HRMS can replace several role-checking guards or permission-checking interceptors with generalized reusable behavior. A later policy change then updates the shared implementation instead of every context-specific copy. section 1.4.3
