LightScript

A close superset of ES7 with JSX and Flow, built with Babel. Designed to make programmers a little more productive.

See lightscript.org for example code and language reference documentation. A quick taste:

Item({ item, isActive }) =>
  className = if isActive: 'active' else: 'inactive'

  <li className={className}>
    {item}
  </li>

Come hang out in the gitter chatroom, where contributors can help you get started and answer any questions.

Language Features

In addition to all all ES7, JSX, and Flow features:

• (Optional) Significant Indentation
• Implicit Returns
• If Expressions
• Auto const
• Async/Await shorthand
• Safe-Await
• Readable Operators (or, and, ==, etc)
• Bound Methods
• Commaless Objects and Arrays
• Automatic Semicolon Insertion that always works
• Array Comprehensions
• Object Comprehensions
• Array-based for-loops
• Object-based for-loops
• a few others

Reference documentation is available at lightscript.org, or in Markdown format here. Tests for all features can be seen here and here.

Project Structure

"LightScript" is split across multiple repos:

• The Parser: babylon-lightscript
  • The core of most of the language.
• The Babel Plugin: babel-plugin-lightscript
  • Rewrites a "LightScript AST" into a "JavaScript AST".
  • The core of what you need to use LightScript.
• The Babel Preset: babel-preset-lightscript
  • Provides the rest of ES7 for ES6 environments, as well as runtime typechecking.
• The Sublime Text Package: lightscript-sublime
  • Provides syntax highlighting, albeit somewhat hackily.
  • Available now on Package Control.
• The Atom Package: lightscript-atom
  • Based on the Sublime Package.
  • Available now on apm.
• The Visual Studio Code Package: lightscript-vscode
  • Based on the Sublime Package.
  • Available now on the VS Code Extension Marketplace.
• The Website: lightscript.org
  • In addition to powering lightscript.org, it's also an example of LightScript code in use.

For now, the issue tracker on this repo should be used for bug reports and feature requests.