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209 packages found
Regular expression matching for email addresses. Maintained, configurable, more accurate, and browser-friendly alternative to email-regex. Works in Node v14+ and browsers. Made for Spam Scanner and Forward Email.
Library to check variable type and properties in object.
A smarter way to check Javascript types.
Robust and comprehensive type checking library for node and the browser
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 input validation.
A library for synchronous and asynchronous error handling.
Runtime type system for TypeScript
A simpler version of Facebook's invariant implementation from React
checktypes-js is a package to help you check the types of a item variable using simple type or scheme for an object
Intuitive type checking functions exposed globally
Simple and Fast Data Validation for Node.js
JS variable type checking
A simple but powerful Type Checking Library