TypeScript `infer`: Create a Self-Typing Fetch Wrapper
Use TypeScript's `infer` to build one fetch wrapper that automatically knows the correct request/response types for every endpoint. It's essential for type-safe calls to APIs with a defined schema.
Instead of manually typing every API call, use TypeScript's `infer` keyword to create a single fetch wrapper that automatically knows the correct request and response types. This is powerful when working with generated types from an API spec like OpenAPI, as your fetch logic can dynamically infer types based on the path and HTTP method. The footgun is writing dozens of separate typed functions for each endpoint, not realizing a single generic function with conditional types can replace them all.
Read the original → piccalil.li
- #typescript
- #generics
- #web api
- #conditional types
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