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209 packages found
A set of types, type checks, and type guards for simpler, safer, and easier to read code.
Library to check variable type and properties in object.
Robust and comprehensive type checking library for node and the browser
A smarter way to check Javascript types.
collection of utility functions support validation
Validate an email address according to RFCs 5321, 5322, and others
Defensive programming framework for TypeScript and JavaScript
Type check values. This is a fork of sindresorhus/is, but with CommonJS support.
test if a value is a javascript primitive type
typyts is a library to safely access nested object.
A library for synchronous and asynchronous error handling.
A library for synchronous and asynchronous input validation.
Runtime type system for TypeScript
A simpler version of Facebook's invariant implementation from React
Intuitive type checking functions exposed globally
A simple but powerful Type Checking Library
checktypes-js is a package to help you check the types of a item variable using simple type or scheme for an object
JS variable type checking
Simple and Fast Data Validation for Node.js