Scala.js vs SourceMeld
Scala.js
scala-js.orgSourceMeld
sourcemeld.comSide by side
| Figure | Scala.js | SourceMeld |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 2 |
| Spec score · Code Transpilers | 7.6 (#19) | 8.1 (#7) |
| License | The project repository states that Scala.js is distributed under the Apache License Version 2.0. | The core uses a source-available license that the company says is not OSI-approved and restricts competing products. |
| Purpose | Scala.js is a Scala to JavaScript compiler for building applications that run in browsers, Node.js, and serverless environments. | SourceMeld integrates, migrates, and searches code across multiple programming languages. |
| Support | The documentation directs users to the community for help, including Discord and Stack Overflow. | Community Edition includes community support, while Enterprise Edition includes dedicated support. |
Plans
In their own words
Scala.js
Scala.js is a Scala-to-JavaScript compiler for building applications that run in browsers, Node.js, and serverless environments. The project also states that WebAssembly support is stable. Scala's strong typing can catch mistakes such as mixing strings and numbers or using misspelled method names, while editor support can flag type errors and show inline details about methods, arguments, return types, and documentation. The project describes incremental compilation with a 1–2 second turnaround; generated JavaScript for a full application starts at 45 kB gzipped. Scala.js can use JavaScript libraries and APIs through statically or dynamically typed access. Listed library integrations include React, Angular, Vue, Three.js, and Chart.js. Build tool options include sbt, scala-cli, Mill, and Gradle with a Scala.js plugin. Tutorials list Scala development tools and Node.js as prerequisites and recommend VS Code with Metals. Scala.js is free and distributed under the Apache License 2.0. Documentation points users to community support through Discord and Stack Overflow. The 1.22.0 release is not entirely backward source compatible with 1.21.x.
SourceMeld
SourceMeld has no write-up on Specifiction yet; its figures are above.