TypeScript-first schema declaration and validation library with static type inference

Convert character encodings in pure javascript.

Modify strings, generate sourcemaps

OpenTelemetry Core provides constants and utilities shared by all OpenTelemetry SDK packages.

Traverse JSON Schema passing each schema object to callback

Strict TypeScript and Flow types for style based on MDN data

Constants and utilities about visitor keys to traverse AST.

Get the first path that exists on disk of multiple paths

YAML 1.2 parser and serializer

Make a callback- or promise-based function support both promises and callbacks.

Node.js path.parse() ponyfill

Safer Node.js Buffer API

An HTTP/1.1 client, written from scratch for Node.js

The tiniest and the fastest library for terminal output formatting with ANSI colors

Get the PATH environment variable key cross-platform

Check if argv has a specific flag

CLI arguments parser. Native port of python's argparse.

Ignore is a manager and filter for .gitignore rules, the one used by eslint, gitbook and many others.

Encode/decode sourcemap mappings

yargs the modern, pirate-themed, successor to optimist.