CAUTION: Please be advised that this project is still under active development.

Because of the nature of this project (reverse engineering CoffeeScript patterns in JavaScript), I don't think that it'll be likely that this tool will ever be ready to convert every CoffeeScript codebase to ES6. It should be used as a helpful tool, and the changes should still be reviewed.

Espresso

A quick shot of ES6 instead that old Coffee.

This is a command line tool for converting CoffeeScript files into their ES6 equivalents*.

*As close as possible, anyway.

Available through NPM

npm install espresso-transformer

Using as CLI: Espresso will look for .coffee files if a directory is passed in as the first argument, and write the new .es6 files to the same directory.

(Given there is a directory called coffeescript)

espresso coffeescript/

To add the JSX transformer:

espresso coffeescript/ --jsx

To change which files to look for:

espresso coffeescript/ --match .coffeescript

To change the file type being written after transformation:

espresso coffeescript/ --extension .js

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Transformers

Core (default) transformer includes:

• CommonJS requires -> ES2015 imports
• CommonJS module.exports -> ES2015 export default
• CoffeeScript fat arrow function => ES2015 fat arrow function
• ES5 property function -> ES2015 object method

JSX transformer includes:

• React.DOM elements -> JSX element
• React component factory -> JSX element

TODO:

• React.createElement

Up and Running (Development)

After cloning this repo:

npm install
npm link
espresso --help