Harmonika

Harmonika parse your Closure code to ES6. Extended from existing project xto6, with additional on-going features to support Closure.

Install

$ npm install harmonika

Run Example

$ harmonika  -s input_files/ins/sample0.js

Developing

Clone from github

$ npm install
$ grunt
$ node bin/index.js --help

Directory Structure

* bin /
  | - index.js (main entry)
* input_files /(sample)
* src /
  | - syntax /
      | - AST representation (reference Mozilla Parser AST)
  | - transformation / (list of parser function)
  | - utils / (string->ast && ast -> string library)
* test /

Previous project existing features

• Function/Prototypes to Classes
• Callback to Arrow functions
• String concatenation to Template Strings
• Using let and const instead of var
• Default arguments instead of a = a || 2
• Function properties in objects to Object methods

Added features

• Remove Namespace
• Convert Google Closure code (goog.require, goog.provide, goog.inherits, goog.isDefinedAndNotNull) to compatible ES6 features
• Convert Closure annotation to Flow type (Currently support : @param, @type, @typedef, @return) and Import/Export type
• Detect Inheritance (super call, extend)
• Improve constructor to support arguments
• import support
• export support
• Implicit import (import all undefined identifier)
• static method
• static properties
• Base class method call using super
• Improve let/const to understand object assignment
• Singleton export

To-do Features