esmangle

esmangle is a ECMAScript code mangler and minifier that operates on Mozilla Parser API AST. It is part of the estools ecosystem (esprima, escodegen) and is designed to work with AST-based transformations for JavaScript minification. Version 1.0.11 is the latest stable release, but the project appears to be unmaintained (last release in 2014). Key differentiators: supports both Node.js and browser environments, provides optimize and mangle passes, and integrates with esprima for parsing and escodegen for code generation.