TypeScript enums have quirks. Here's when to use them and better alternatives.
Numeric Enums#
Loading code block...
String Enums#
Loading code block...
Const Enums#
Loading code block...
String Literal Unions (Preferred)#
Loading code block...
Object as Enum#
Loading code block...
Discriminated Unions#
Loading code block...
Helper Utilities#
Loading code block...
When to Use What#
Loading code block...
Migration from Enums#
Loading code block...
Best Practices#
Prefer:
✓ String literal unions for types
✓ Const objects for runtime values
✓ Discriminated unions for state
✓ const enum only when needed
Avoid:
✗ Regular numeric enums
✗ Heterogeneous enums
✗ Enums when simple types work
✗ Over-engineering simple cases
Consider:
✓ Bundle size impact
✓ Runtime iteration needs
✓ Type safety requirements
✓ Team familiarity
Conclusion#
TypeScript enums have their place but often better alternatives exist. String literal unions provide type safety without runtime overhead. Const objects give both runtime values and type safety. Discriminated unions handle complex state elegantly. Reserve enums for bitwise operations or when you specifically need their behavior.