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Scala.js VS Opal (Ruby)

Compare Scala.js VS Opal (Ruby) and see what are their differences

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Scala.js logo Scala.js

Build robust front-end web applications in Scala with Scala.js

Opal (Ruby) logo Opal (Ruby)

Ruby to Javascript Compiler. It is source-to-source, making it fast as a runtime. Opal includes a compiler (which can be run in any browser), a corelib and runtime implementation.
  • Scala.js Landing page
    Landing page //
    2023-06-23
  • Opal (Ruby) Landing page
    Landing page //
    2024-12-22

Scala.js features and specs

  • Strong Type System
    Scala.js brings Scala’s powerful type system to JavaScript development, reducing runtime errors and enhancing code reliability and safety.
  • Interoperability with JavaScript
    Seamlessly interoperates with JavaScript libraries and frameworks, allowing developers to utilize existing JavaScript tools and APIs.
  • Code Reusability
    Facilitates code sharing between server and client-side codebases when using Scala on both ends, increasing productivity and maintainability.
  • Functional Programming
    Supports functional programming paradigms which can lead to more concise and expressive code compared to traditional JavaScript.
  • Ecosystem
    Access to a wide range of Scala libraries thanks to the ability to use JVM-based libraries, enhanced by the 'Scala.js-specific libraries'.

Possible disadvantages of Scala.js

  • Build Complexity
    Requires a more complex build setup compared to vanilla JavaScript projects, introducing a learning curve for new developers.
  • Performance Overhead
    The additional abstraction layer can sometimes result in performance overhead when compared to native JavaScript.
  • Community and Support
    Smaller community compared to JavaScript, which can result in fewer resources, tutorials, and community support for problem-solving.
  • Learning Curve
    Developers need to learn Scala, which might be difficult for those not familiar with functional programming and type safety concepts.
  • Tooling Limitations
    Though improving, tooling support, especially for debugging in a pure Scala.js environment, might not be as robust as native JavaScript tools.

Opal (Ruby) features and specs

No features have been listed yet.

Scala.js videos

+ Add

Deriving the Frontend — Form Combinator Fun with Scala.js

More videos:

  • Review - Laminar – Smooth UI Development with Scala.js

Opal (Ruby) videos

No Opal (Ruby) videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Scala.js and Opal (Ruby))

Scala.js

Opal (Ruby)

Personal Finance
70 70%
Personal Finance
30% 30
Financial Planner
63 63%
Financial Planner
37% 37
Android
70 70%
Android
30% 30
Web Development
100 100%
Web Development
0% 0

User comments

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What are some alternatives?

When comparing Scala.js and Opal (Ruby), you can also consider the following products

Mint - Free personal finance software to assist you to manage your money, financial planning, and budget planning tools. Achieve your financial goals with Mint.

EarlGrey - EarlGrey is a native iOS UI automation test framework that enables you to write clear, concise tests.

ReasonML - ReasonML is a new face to OCaml that--when coupled with BuckleScript--makes web development easy...

Haste - Decreases ping in video games.

PureScript - PureScript is a small strongly typed programming language that compiles to JavaScript.

Amber - Bitcoin on autopilot

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