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TypeScript2024-11-1212 min read
TypeScript Generics: A Complete Guide
Understanding Generics
Generics are one of TypeScript's most . They allow you to write flexible, reusable code that works with any type:
Generic Functions
Write a function once, use it with any type:
💡 Generic Function:
Instead of writing separate functions for each type, use function getId<T>(obj: T): T { ... }
Generic Constraints
Limit what types can be passed to a generic:
- ✅ Restrict to specific types
- ✅ Require properties on the type
- ✅ Ensure compatibility between types
- ✅ Improve type safety
Practical Examples
API Response Wrapper
Wrap any data type in success/error response
Array Utilities
Generic array methods work with any element type
Store/Repository Pattern
Generic store works with any entity type
Conclusion
Generics are essential for writing scalable TypeScript. Master them to write cleaner, more maintainable code.
#TypeScript#Generics#Type Safety