Type-guard Packages

Generic type guards for TypeScript

Functions and types for functional programming

Falsy helper functions and types for TypeScript.

Predicate helper functions and types for TypeScript.

CLI for code generation of generic typeguards

Koa middleware for handling errors.

Typescript library for typesafe creation of validation functions and type guards.

Nullish helper functions and types for TypeScript.

Type-guards for Bitmex API objects

Declarative type-safe data decoding, encoding and run-time assertions for JS

Typescript library to declare type-safe models by inferring model types from their validators.

Type-guard for DerivedRecord

Type-guard for Record

Strongly typed value encoder and decoder with runtime type checking. Inspired by Swift's Codable

Type-guards, casts and converts unknowns into typed values

A modern TypeScript library designed to reduce boilerplate for tagged unions, also known as discriminated unions. This library is also an implementation of algebraic data types

library providing precise and in-depth type information for any JavaScript object, be it a primitive, built-in types, ES6/ES2020 types or custom class.

Provides type detection and analysis for ANY Javascript object (including custom types) in any environment, even where native operators falter.

A simple library for implementing type guard in TypeScript.