Rich matchers inspired by Hamcrest. Useful for generating helpful assertion failure messages in tests.

Parser and generator for CSS color strings

Strip the final newline character from a string or Uint8Array

Provides low-level interfaces and helper methods for authentication in Azure SDK

Tokenizes a string that represents a regular expression.

Safely and quickly serialize JavaScript objects

PostCSS plugin to replace overflow-wrap with word-wrap or optionally retain both declarations.

Convert a value to a ReadableStream

Emmet standalone abbreviation parser

Global identifiers from different JavaScript environments

Manage state with style in every framework

Claude Cup — worldwide building contest. Track your Value/Token Ratio, climb the real-time leaderboard, and fill a live trophy in your terminal.

An error subclass for wrapping non-error values

Precondition checking utilities.

Stylish console.log for node

Serialization symbols for custom class serialization in Workflow SDK

Map object keys and values into a new object

Formatting user's text input on-the-fly

Parse the Forwarded header (RFC 7239) into an array of objects

Key/value storage for JavaScript File objects