JavaScript parser, mangler/compressor and beautifier - CLI tool

 UglifyJS is a JavaScript compressor/minifier written in JavaScript.
 It also contains tools that allow one to automate
 working with JavaScript code:
 .
  * A parser which produces an abstract syntax tree (AST)
    from JavaScript code.
  * A code generator which outputs JavaScript code from an AST,
    also providing the option to get a source map.
  * A compressor (optimizer) -
    it uses the transformer API to optimize an AST into a smaller one.
  * A mangler -
    reduce names of local variables to (usually) single-letters.
  * A scope analyzer, which is a tool that augments the AST
    with information about where variables are defined/referenced etc.
  * A tree walker -
    a simple API allowing you to do something on every node in the AST.
  * A tree transformer -
    another API intended to transform the tree.
 .
 All the above utilities and APIs are defined in ~6500 lines of code
 (except for the effective generation of the source-map,
 which is handled by the source-map module).
 Compared to alternatives, UglifyJS is pretty small.
 .
 This package provides the command-line tool uglifyjs.