opal ☆

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Description:
Ruby to JavaScript transpiler

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | @opalrb | formulae.brew.sh

Category: Developer tools

Tags: ruby javascript transpiler compiler web-development language-tool

Install: brew install opal

About:
Opal is a source-to-source compiler that translates Ruby code into JavaScript, allowing developers to write Ruby syntax for client-side applications. It includes a comprehensive standard library implementation and runtime, providing seamless interoperability between Ruby and JavaScript. This tool enables full-stack Ruby development by letting developers use a single language across both server and browser environments.

Key Features:

Ruby-to-JavaScript transpilation with full language compatibility
Comprehensive standard library implementation for browser environments
Seamless Ruby and JavaScript interoperability
Support for Ruby gems and modules in browser code
Source maps for debugging original Ruby code in browser dev tools

Use Cases:

Building browser-based applications using Ruby syntax instead of JavaScript
Creating isomorphic applications with shared Ruby code between server and client
Porting Ruby libraries and logic to run in web browsers
Prototyping web interfaces using familiar Ruby paradigms

Alternatives:

CoffeeScript – Compiles to JavaScript but uses Python-like syntax rather than Ruby
TypeScript – Superset of JavaScript with static typing, not Ruby-based
Babel – JavaScript transpiler focused on modern JS features, not Ruby compilation

Version History

Detected	Version	Rev	Change	Commit
Sep 16, 2025 9:25am		0	VERSION_BUMP	233c3024