scala-js/scala-js

Health v2 · maintenance only

Adoption not part of the score

4710 stars · 408 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Scala.js is a compiler that translates Scala code into efficient JavaScript, letting developers write type-safe applications for browsers, Node.js, and serverless environments. It provides full interoperability with JavaScript libraries and ecosystems while retaining Scala's strong static typing.

Use cases

• compile scala code to javascript
• build type-safe frontend apps in scala
• share code between jvm backend and browser frontend
• use react from scala with static typing
• develop serverless functions in scala
• avoid javascript type errors with strong typing

When to choose

• your team knows Scala and wants to target the browser or Node.js
• you want strong static typing and editor tooling over JavaScript
• you need to share business logic between JVM and JavaScript codebases

When to avoid

• your team is JavaScript/TypeScript-first with no Scala experience
• you need tiny bundle sizes below what optimized Scala.js output provides
• you rely on JS tooling or libraries without good interop needs

Facets

cli-tool · maturity stable

compiler programming-language type-system developer-tools compilers programming-languages web-development frontend cross-platform browser cross-platform jvm scala scala-to-javascript transpiler strong-typing javascript-interop compiler nodejs web-server

Member repositories

For agents

markdown · JSON · MCP: product_card(name="scala-js/scala-js")