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Implement Type-Safe Pagination with Discriminated Unions

pagination type-safety generics middleware
Prompt
Design a generic TypeScript pagination middleware for REST APIs that uses discriminated unions to handle different response types. Create a robust type system that can safely represent paginated results with optional metadata, supporting both array and cursor-based pagination strategies. Include error handling, type inference for generic data types, and compile-time type safety guarantees.
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TypeScript
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Mar 1, 2026

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Use Cases
  • Implement safe pagination in data-heavy APIs.
  • Reduce errors in client-side data handling.
  • Enhance API response consistency across versions.
Tips for Best Results
  • Define clear pagination strategies in your API design.
  • Test pagination thoroughly to ensure reliability.
  • Document pagination methods for developer clarity.

Frequently Asked Questions

What is Type-Safe Pagination with Discriminated Unions?
It's a method to implement pagination while ensuring type safety in APIs.
How does it improve API development?
By reducing errors related to pagination and enhancing data integrity.
Is it suitable for all types of APIs?
Yes, it can be applied to both REST and GraphQL APIs.
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