Opal
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VisitOpal vs SWC
What both publish
| Fact | Opal | SWC |
|---|---|---|
| Compilation | Opal compiles Ruby to plain JavaScript ahead of time, without a runtime interpreter. | SWC compiles modern JavaScript and TypeScript into code supported by major browsers. |
Opal plans
- OpalFree
SWC plans
- SWCFree
Pick Opal if…
Opal suits Ruby developers who want to use Ruby code in browser or JavaScript environments. Its ES2021 target and lack of older-engine fallback are relevant for teams choosing where that code will run.
Pick SWC if…
SWC suits developers and build-tool authors working with JavaScript or TypeScript. It is also relevant to teams seeking compiler integrations with tools such as webpack, Rspack, or Jest.