| PackageDescription | JavaScript parser, mangler/compressor and beautifier toolkit
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. |