easier than regex string matching patterns for urls and other strings. turn strings into data or data into strings.
Generic implementation of the observer pattern
SQL ORM built on top of Active Record pattern
Babel plugin that replaces System.import with the equivalent UMD pattern
Adds pattern matching, optional properties, and several other helpers and types, to io-ts.
Nav's Pattern Library

Semantic duplicate pattern detection for AI-generated code - finds similar implementations that waste AI context tokens
Ushahidi Platform Pattern Library
Node.js Circuit Breaker Pattern
Search and Rewrite code at large scale using precise AST pattern
Search and Rewrite code at large scale using precise AST pattern
MUSUBIX Pattern Library Learning MCP - AST-based pattern extraction and abstraction
Expand a regular expression pattern into a set of words
modify-method based class implementation of the resource pattern
Browser-based WordPress block pattern validator using Playwright
A JavaScript library that helps with the enum pattern. Also supports TypeScript.
Using chain of responsibility design pattern for compositing and customizing React component.
CDK Constructs for Lambda@Edge pattern: HttpHeaders
Plugin for @sapphire/framework that adds support for pattern commands.
Automattic Page Pattern Modal.
## A pattern for responsive markup
Specification pattern for TypeScript
Make a glob pattern absolute, ensuring that negative globs and patterns with trailing slashes are correctly handled.