Esmangle

esmangle is mangler / minifier for Mozilla Parser API AST


Project maintained by Constellation Hosted on GitHub Pages — Theme by mattgraham

esmangle (esmangle) is mangler / minifier for Mozilla Parser API AST.

Install

esmangle can be used in a web browser: Download

<script src="esmangle.js"></script>

or in a Node.js application via the package manager:

npm install esmangle

Usage

A simple example: the program

var ast = esprima.parse(code);
var result = esmangle.mangle(ast);  // gets mangled result
console.log(escodegen.generate(result));  // dump AST

Or you can simply use this esmangle command in the shell.

esmangle file.js

Get more compressed result: (in Node.js)

var ast = esprima.parse(code);
// Get optimized AST
var optimized = esmangle.optimize(ast, null);
// gets mangled AST
var result = esmangle.mangle(optimized);
console.log(escodegen.generate(result, {
    format: {
        renumber: true,
        hexadecimal: true,
        escapeless: true,
        compact: true,
        semicolons: false,
        parentheses: false
    }
}));  // dump AST

Demo

Code

Result

Note

This resolution algorithm is based on my bytecode compiler iv / lv5 / railgun.

License

Copyright (C) 2012 Yusuke Suzuki (twitter: @Constellation) and other contributors.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Build Status

Fork me on GitHub