Ruby2JS

Enables writing frontend logic in Ruby's clean, readable syntax, which transpiles directly to modern JavaScript as shown in examples like `items.map { |x| x * 2 }` becoming `items.map(x => x * 2)`.

Seamlessly works with Rails, Stimulus, React, and Lit, allowing developers to unify their stack using Ruby, as highlighted in the framework integrations documentation.

Customizable filters transform Ruby methods to JavaScript equivalents, such as converting `.each` to `.forEach`, providing flexibility in code translation.

Supports outputting JavaScript for specific ES versions from 2020 to 2025, ensuring compatibility with modern browser features and runtimes.