Esprima-FB

A Facebook-specific fork of the Esprima JavaScript parser, version 15001.1001.0-dev-harmony-fb, that adds full support for JSX syntax extensions on top of ECMAScript 5.1 and experimental ES6/Harmony features. Unlike standard Esprima, this fork enables parsing JSX as used by React and JSXDOM. It maintains compatibility with Mozilla Parser AST format and includes syntax location tracking. Its versioning scheme maps to upstream Esprima harmony branches with Facebook modifications. No longer actively maintained; replaced by modern parsers like Babel.