API Examples

INFO

This is a pure ESM package, so you need to use import instead of require. For more info, check out this gist.

npm install webcrack

Basic Usage

import { webcrack } from 'webcrack';

const result = await webcrack('const a = 1+1;');
console.log(result.code); // 'const a = 2;'

Save the deobufscated code and the unpacked bundle to the given directory:

import fs from 'fs';
import { webcrack } from 'webcrack';

const code = fs.readFileSync('bundle.js', 'utf8');
const result = await webcrack(code);
await result.save('output-dir');

Get Bundle Info

const { bundle } = await webcrack(code);
bundle.type; // 'webpack' or 'browserify'
bundle.entryId; // '0'
bundle.modules; // Map(10) { '0' => Module { id: '0', ... }, 1 => ... }

const entry = bundle.modules.get(bundle.entryId);
entry.id; // '0'
entry.path; // './index.js'
entry.code; // 'const a = require("./1.js");'

Options

The default options are:

await webcrack(code, {
  jsx: true, // Decompile react components to JSX
  unpack: true, // Extract modules from the bundle
  unminify: true, // Unminify the code
  deobfuscate: true, // Deobfuscate the code
  mangle: false, // Mangle variable names
});

Customize Paths

Useful for reverse-engineering and tracking changes across multiple versions of a bundle.

If a matching node in the AST of a module is found, it will be renamed to the given path.

• Path starting with ./ are relative to the output directory.
• Otherwise, the path is treated as a node module.

const result = await webcrack(code, {
  mappings: (m) => ({
    './utils/color.js': m.regExpLiteral('^#([0-9a-f]{3}){1,2}$'),
    'lodash/index.js': m.memberExpression(
      m.identifier('lodash'),
      m.identifier('map'),
    ),
  }),
});
await result.save('output-dir');

New folder structure:

├── index.js
├── utils
│   └── color.js
└── node_modules
    └── lodash
        └── index.js

See @codemod/matchers for more information about matchers.