TypeScript

as const tells TypeScript to infer the narrowest possible types and make values readonly, turning loose objects into precise literal data.

You don't need an OpenAPI pipeline to get end-to-end types on fetch. Validate responses at the boundary and let inference do the rest.

Generics are not academic line noise. Used with a few simple rules they make functions reusable and self-documenting without the pain.

Stop juggling isLoading, error, and data as separate fields. Discriminated unions make impossible states unrepresentable in TypeScript.

The satisfies operator validates a value against a type without widening it, so you keep precise inference and still catch mistakes.

Autocomplete that stalls and red squiggles that lag are usually a type-checking problem. Here is how to find and fix the expensive types.