vstream JSON Parser Stream

JSON →
library 1.0.1 ·javascript abandoned
verified May 27, 2026

vstream-json-parser is a Node.js object-mode Transform stream designed for parsing chunks of UTF-8 text, typically newline-separated JSON objects, into plain JavaScript objects. Its current stable version is 1.0.1. The library differentiates itself by leveraging the `vstream` interface for warning management rather than emitting fatal `error` events for common operational issues like malformed JSON or `null` values. It processes transformations synchronously but throttles to one input per tick to maintain event loop liveness. Key features include its object-mode output, customizable `highWaterMark` (defaulting to 0 for low memory usage), and specific handling for `null` JSON values, which are ignored because Node.js streams cannot represent them without ending the stream. This package is particularly suited for processing large streams of structured log data or similar continuous JSON feeds where error recovery and liveness are critical. Given the last activity on GitHub (2015 copyright), the project appears to be in a maintenance or abandoned state.

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