nodejs-when

When.js is a rock solid, battle-tested Promises/A+ and when() implementation, including a complete ES6 Promise shim. It's a powerful combination of small size, high performance, debuggability, and rich features: * Resolve arrays and hashes of promises, as well as infinite promise sequences * Execute tasks in parallel or sequentially * Transform Node-style and other callback-based APIs into promise-based APIs When.js is one of the many stand-alone components of cujoJS, the JavaScript Architectural Toolkit.

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