Runtime type assertions for function arguments in Node.js
Rich matchers inspired by Hamcrest. Useful for generating helpful assertion failure messages in tests.
What is the type of this builtin JS value?
Synchronous validation of a path existing either as a file or as a directory.
Type check values
Extra assertions on top of node's assert module
Helper function for exhaustive checks of discriminated unions in TypeScript
Parses, serializes, and manipulates MIME types, according to the WHATWG MIME Sniffing Standard
ECMAScript spec abstract operations.
Power Assert output formatter
minimalistic-assert ===
TypeScript definitions for http-assert
The assert module from Node.js, for the browser.
Search from DuckDuckGo and use it's spice APIs.
correct invalid SPDX expressions
assert with status codes
typesafe assertion library for TypeScript 3.7+
Featherweight assert module
A robust, ES3 compatible, "has own property" predicate.
Give me a string and I'll tell you if it's a valid npm package license string
format power-assert context
Is this value a JS ArrayBuffer?
Is this value a JS SharedArrayBuffer?
`Object.getOwnPropertyDescriptor`, but accounts for IE's broken implementation.