Parse, validate, manipulate, and display dates

Immutable data structures for JavaScript which are backwards-compatible with normal JS Arrays and Objects.

String validation and sanitization

Fast, lightweight JSON Schema validator for Node.js and browsers — full support for draft-04, draft-06, draft-07, draft-2019-09, and draft-2020-12 (latest)

Fix babel/babel#2212

BDD/TDD assertion library for node.js and the browser. Test framework agnostic.

Object properties matcher for Chai

Standard ESLint rules for Frost projects

Eslint rules for mocha.

Enforce best practices for JavaScript promises

ESlint Plugin for the Standard Linter

Yet another JS code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests. Supports all JS coverage use ca

simple, flexible, fun test framework

A lightweight library that provides tools for organizing asynchronous code

JavaScript test spies, stubs and mocks.