Fast XML Parser and Validator

fast-xml-parser is a robust JavaScript library for parsing XML to JavaScript objects, validating XML syntactically, and historically, building XML from JS objects. It is engineered for speed and efficiency, capable of handling large XML files (tested up to 100MB) without relying on C/C++ native libraries. As of v5.7.1, the package is actively maintained with frequent minor and patch releases, incorporating performance improvements and dependency updates. A key differentiator is its pure JavaScript implementation, broad compatibility (CommonJS, ESM, and browser environments), and extensive support for various XML features including entities, unpaired tags, and customizable parsing options. The XML Builder functionality was separated into a dedicated `fast-xml-builder` package in version v5.4.0, focusing `fast-xml-parser` primarily on parsing and validation.