@sindresorhus/is
Type check values
Type check values
simple, flexible, fun test framework
BDD/TDD assertion library for node.js and the browser. Test framework agnostic.
Error constructor for test and validation frameworks that implements standardized AssertionError specification.
TypeScript implementation of invariant(condition, message)
Lazy assertions without performance penalty
Function argument validation for humans
Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)
Power Assert feature enhancer for assert function/object
Automated browser testing for the modern web development stack.
The powerful, easy-to-use testing framework.
Node.js test runner that lets you develop with confidence.
Assertion toolkit for Puppeteer.
Power Assert in JavaScript
Power Assert feature enhancer for assert function/object
Power Assert output formatter
A port of Node v6's internal _deepEqual function in a universal style
Babel plugin for power-assert
Check two valid geojson geometries for equality.
A tiny javascript type testing tool