Check is name available in npmjs.com. Lightweight. 100% versions support. Zero dependency

type-check allows you to check the types of JavaScript values at runtime with a Haskell like type syntax.

Error comparison and information related utility for node and the browser

Large collection of predicates.

Check whether a binary version satisfies a semver range

Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.

Check the engines and platform fields in package.json

Check whether a package or organization name is available on npm

Check if a binary is working

Check if a path is a file, directory, or symlink

Check if a string matches the name of a Node.js builtin module

Check if a value is an object

Check if something can be an ecmascript (javascript) identifier name

JS type check (TypeScript supported) functions like `isPlainObject() isArray()` etc. A simple & small integration.

A list of color names and its values

Regular expression for matching scoped npm package names

A simple Node.js module to check if a TCP port is already bound.

Check which JavaScript environment your code is running in at runtime: browser, Node.js, Bun, etc

A little library for asserting types and values, with zero dependencies.

Check if a binary is working