ESLint rules for catching unhead misuse, type-narrowing issues, and v2-to-v3 migration problems.

TypeScript-first test assertion functions with precise type narrowing

Zero-dependency TypeScript runtime validation toolkit for composable type guards and natural type narrowing.

yaebal filters — composable, type-narrowing update filters (and/or/not) for ctx.filter().

type narrowing for typescript

ESLint plugin for runtime reliability — enforces error handling, network timeouts, null checks, and safe type narrowing.

✔ Document One of properties in OpenApi \ ✔ Scalable way to define polymorphic response without the need to change a shared file \ ✔ Easy type narrowing for consumers of OpenApi docs \ ✔ TypeScript Support – Fully typed for a smooth developer experience.

Type safe utility for defining static constants with automatic type narrowing and additional helper functions

Composable runtime value checks that play well with TypeScript's type narrowing

TypeScript assertion and type-guard toolkit for runtime validation and type narrowing.

Simple utility for `if (typeof object[property]) ...` type narrowing.

A simple library for two-step type-narrowing

Types and related utilities for TypeScript

A comprehensive collection of strongly-typed predicate functions and type guards for TypeScript, providing runtime type checking and type narrowing capabilities.

TypeScript tiny narrowing helpers you better use.

A set of types, type checks, and type guards for simpler, safer, and easier to read code.

Check if a value is a Fetch network error

TypeScript-friendly testing utilities.

MongoDB ORM client for Prisma Next

Fork of @graphql-codegen/typescript-react-apollo with support for Apollo Client 4