A functional programming library for TypeScript, using immutable data structures and type classes
Custom ESLint rules for functional TypeScript programming with functype library patterns including Do notation (ESLint 10+)
React bindings for functype — ADT-aware hooks and exhaustive pattern matching components
Curated ESLint flat config bundle for functional TypeScript programming (ESLint 9.x+)
MCP server for functype documentation lookup and TypeScript code validation
Functional OS utilities using functype data structures — env vars, path expansion, file ops, platform detection
IO-native logging for functype — wraps LogLayer with Tag/Layer DI, structured logging, and test utilities
Is this specifier a node.js core module?
Babel compiler core.
Standard library
core-js compat
tldts core primitives (internal module)
Core functions & classes shared by multiple AWS SDK clients.
The `util.is*` functions introduced in Node v0.12.
Positioning library for floating elements: tooltips, popovers, dropdowns, and more
A high-level API to automate web browsers
regexpu’s core functionality (i.e. `rewritePattern(pattern, flag)`), capable of translating ES6 Unicode regular expressions to ES5.
Standard library
Accessibility engine for automated Web UI testing
[](https://www.npmjs.com/package/@smithy/core) [](https://www.npmjs.com/package/@smithy/core)
The core of the humanfs library.
Super-fast alternative for babel
OpenTelemetry Core provides constants and utilities shared by all OpenTelemetry SDK packages.
@vue/compiler-core
Core functional programming types for Rust
Functional programming library for Rust