Run scripts that set and use environment variables across platforms

Type safe utilities for throwing errors (and responses) if things aren't quite right. Inspired by npm.im/invariant

micromark extension to make Markdown strikethrough (`~~`) in GFM more friendly with Chinese, Japanese, and Korean (CJK)

remark plugin to make Markdown emphasis (`**`) in CommonMark (and MDX) more friendly with Chinese, Japanese, and Korean (CJK)

A library for parsing VS Code style problem matchers

markdown-it plugin to make Markdown emphasis (`**`) in CommonMark more friendly with Chinese, Japanese, and Korean (CJK)

remark plugin to make Markdown strikethrough (`~~`) in GFM more friendly with Chinese, Japanese, and Korean (CJK)

Minimal web-style fetch TypeScript typings

Allows you to build compile-time libraries

RFC 9457 Problem Details for NestJS — standardized HTTP errors, typed problem exceptions, validation errors, Retry-After, and OpenAPI integration.

Make a directory and its parents if needed - Think `mkdir -p`

Make your own error types!

Utility to make jest tests fail when console.error() or console.warn() are used

A drop-in replacement / proxy to Node.js path, replacing \\ with / for all results & adding file extension functions.

Utility to make vitest tests fail when console.error() or console.warn() are used

pipe streams together and close all of them if one of them closes

Info about your dev environment for debugging purposes

A sane HTTP client library for Node.js with Streams2 support.

Crash or abort if you get an unhandledRejection or multipleResolves

Parse, Resolve, and Dereference JSON Schema $ref pointers