jsonquery

Node.js streaming filter that implements MongoDB query language for filtering JSON documents in a pipeline. Stable version 0.2.0, with low release cadence (last release years ago). Differentiators: lightweight, streams-based, supports full MongoDB query syntax including $and, $or, $gt, $in, etc. Use with any readable stream of JSON objects, commonly paired with levelup/leveldb. Alternatives like mongodb native driver are heavier and not stream-oriented.