#check

Unit tests for TypeScript definitions in your JS open source library

A simple and composable way to validate data in JavaScript (and TypeScript).

ESLint Config for JavaScript Standard Style

Check if argv has a specific flag

Answers the question: "can this value have keys?". Returns true if a value is any of the object types: array, regexp, plain object, function or date. Useful for determining if a value is an object that can be extended.

Rust library for checking the installed/running rustc's version.

Match BCP 47 language tags with language ranges per RFC 4647

Get the native JavaScript type of a value, fast. Used by superstruct, micromatch and many others!

Markdown Style Guide, with linter and automatic fixer.

Runtime library to validate data against TypeScript interfaces.

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

[REMIX FORK] A tiny tool to run `tsc` on specific files without ignoring tsconfig.json

JavaScript/Node.js utility. Returns `true` if the value is a number or string number. Useful for checking regex match results, user input, parsed strings, etc.