ECMAScript parser

writable stream that concatenates strings or binary data and calls a callback with the result

Traverse an ESTree-compliant AST

Modify strings, generate sourcemaps

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

Tool to turn functions with Node-style callback APIs into functions that return Promises

A simple zero-configuration command-line http server

Yet another JS code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests. Supports all JS coverage use ca

simple, flexible, fun test framework

JavaScript Standard Style