JSPM

Type check values

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

Type check values. This is a fork of sindresorhus/is, but with CommonJS support.

Assertions and typeguards

Object validation tools for Javascript and, specially, Typescript

a typescript library for building type guards quickly while maintaining type safety

Function library written in typescript

A utility library that provides borrowing mechanisms via assertion functions

TS type guards for Body Link projects

Utilities for a more type-safe TypeScript

Check if a value is property accessible

A comprehensive, platform-agnostic collection of type guards for TypeScript and JavaScript

Personal common used types, type guards and other to quickly jumpstart a new project or experiment

Typeguards for mdast including directives and MDX.

A proof-of-concept validation library with TypeScript type-safety.

A collection of utilities for typeguards, typecheck, converters and more.

Everyday use typeguards for your JavaScript and TypeScript codebase

Typeguards for estree.

Gillian HOLA Function library written in typescript