queue.io

Event-based queue iteration library for JavaScript (v2.3.0). Allows creating asynchronously filled queues from event emitters or iterables, then iterating over them with forward/backward directions. Supports appending, prepending (listen), and intercepting queues. Key differentiator: queues can be populated before or after iterators are created, and multiple independent iterators can traverse the same queue in different directions. Depends on Node.js EventEmitter. Not heavily maintained (last update years ago).