openfn/core

ECMAScript parser

Intercept and mock outgoing network TCP connections and HTTP requests for testing. Intercepts and gives you a Net.Socket, Http.IncomingMessage and Http.ServerResponse to test and respond with. Useful when testing code that hits remote servers.

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

simple, flexible, fun test framework

Error-tolerant ECMAScript parser

Esprima-compatible implementation of the Mozilla JS Parser API

Proper JavaScript code templating with source maps support.

JavaScript syntax tree transformer, nondestructive pretty-printer, and automatic source map generator

vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules. Securely!

Improved deep equality testing for Node.js and the browser.