Type checking Packages

is an open source dynamic type checking library for Javascript and Node.js to test if a given variable is what it is supposed to be.

Experimental function argument structure helper for Javascript/Coffeescript

Static analysis with extra features for lua

Checkjs is a library for type checking and more!

Define shapes and types and use them for data/structure validation

Small Module to validate Javascript Variable (Objects) According to a set of predefined Rules

Powerful and easy runtime type checking

A Simple Type Sniffer for JS

Runtime type checking for JavaScript/CoffeeScript/LiveScript

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

Simple JS Type Tests

Radium plugin that lints your styles

Execute a given callback at periodic interval, trying to minimize drift and jitter

Tiny and extendable library for class parameters type checking and reflection

Enhances Svelte's Context API with TypeScript type checking for a more robust development experience.

Better state management for JavaScript objects

Typesafe wrapper for Express middleware, checking body type at both compile-time and runtime

Typesafe JSON requests and responses for Express, checked both on compile-time and run-time

A simple, no-nonsense type checking library.

Type checking in JS