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What is opal-sprockets?

tobymao/opal-sprockets — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2019-12-12

RubyAudience · developerComplexity · 3/5DormantSetup · moderate

In one sentence

A Ruby gem that lets you write browser code in Ruby by bridging the Opal compiler with the Sprockets asset pipeline.

Mindmap

mindmap
  root((repo))
    What it does
      Compiles Ruby to JS
      Sprockets integration
      Auto dependency detection
    Tech stack
      Ruby
      Opal
      Sprockets
      Rack
    Use cases
      Write browser code in Ruby
      Share code server and client
      Debug via source maps
    Audience
      Ruby web developers

Code map

Detail Auto

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filefunction / class

What do people build with it?

USE CASE 1

Write .rb files that get compiled to JavaScript and served to the browser.

USE CASE 2

Share Ruby code between a Ruby backend and the browser frontend.

USE CASE 3

Use standard Ruby require syntax instead of Sprockets-specific directives.

USE CASE 4

Debug compiled browser code using source maps that point back to the original Ruby.

What is it built with?

RubyOpalSprocketsRack

How does it compare?

tobymao/opal-sprockets100rabhg/masterdetailapp100rabhg/pizzafactroy
LanguageRubyRubyRuby
Last pushed2019-12-122024-02-202025-01-26
MaintenanceDormantDormantStale
Setup difficultymoderatemoderatemoderate
Complexity3/52/53/5
Audiencedeveloperdeveloperpm founder

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · moderate Time to first run · 30min

Requires setting up a config.ru entry point and running via bundle exec rackup.

No license information was found in the explanation.

Copy-paste prompts

Prompt 1
Help me set up a config.ru file to serve Ruby code to the browser with opal-sprockets.
Prompt 2
Explain how opal-sprockets detects and loads Ruby require dependencies automatically.
Prompt 3
Show me how to debug a browser error that traces back to my original Ruby source via source maps.
Prompt 4
Is opal-sprockets still maintained separately from Opal, and how do I check compatibility?

Frequently asked questions

What is opal-sprockets?

A Ruby gem that lets you write browser code in Ruby by bridging the Opal compiler with the Sprockets asset pipeline.

What language is opal-sprockets written in?

Mainly Ruby. The stack also includes Ruby, Opal, Sprockets.

Is opal-sprockets actively maintained?

Dormant — no commits in 2+ years (last push 2019-12-12).

What license does opal-sprockets use?

No license information was found in the explanation.

How hard is opal-sprockets to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is opal-sprockets for?

Mainly developer.

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