regenerator

This package implements a fully-functional source transformation that takes the proposed syntax for generators/yield from future versions of JS (ECMAScript6 or ES6, experimentally implemented in Node.js v0.11) and spits out efficient JS-of-today (ES5) that behaves the same way. A small runtime library (less than 1KB compressed) is required to provide the wrapGenerator function. You can install it either as a CommonJS module or as a standalone .js file, whichever you prefer.