corybill/maddox

Full featured Promises/A+ implementation with exceptionally good performance

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

The `util.is*` functions introduced in Node v0.12.

Javascript utility for calculating deep difference, capturing changes, and applying changes across objects; for nodejs and the browser.

Deep diffs two objects, including nested structures of arrays and objects, and return the difference.

Error factory with the ability to append stack traces from previous errors, as well as appending debug params to stack traces. Great if you want one appended stack trace that defines the error at many levels of your code. This concept works wonders when using promise chains because you get the stack trace at each level of your code.

fs-extra contains methods that aren't included in the vanilla Node.js fs package. Such as recursive mkdir, copy, and remove.

simple, flexible, fun test framework

Support for Precondition error checking in Node.js.

JavaScript test spies, stubs and mocks.

Visual diff between javascript variables

TypeScript plugin for ESLint

An ESLint custom parser which leverages TypeScript ESTree

Chance - Utility library to generate anything random

The semantic version parser used by npm.

RFC9562 UUIDs

Check if an object is contained within another one

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