type-fest
A collection of essential TypeScript utility types that should have been built-in.
What is type-fest?
Type Fest is a curated collection of essential TypeScript utility types that address common gaps in the language's built-in type system. It provides developers with reliable, well-tested type helpers for tasks like deep object transformations, conditional type logic, string manipulation, and JSON handling—many of which the maintainer believes should have been included in TypeScript itself.
TypeScript developers building complex type-safe applications, library authors needing robust type utilities, and teams wanting to enforce stricter type contracts and improve developer experience through better type hints.
Developers choose Type Fest for its comprehensive, production-ready utility types that are meticulously maintained, follow TypeScript's design principles, and solve real-world type system pain points without introducing experimental or niche features.
Overview
A collection of essential TypeScript types
Use Cases
Best For
- Adding deep partial/readonly/required transformations to complex nested types
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