test262.fyi

Independent daily test262 (standard test suite) runner for many JS engines (test262.report spiritual successor). WIP.

Engines

• V8 site source
• SpiderMonkey site source
• JavaScriptCore source
• ChakraCore source
• Hermes site source
• LibJS source
• engine262 site source
• GraalJS source
• QuickJS site source
• XS site source
• Rhino site source
• Boa site source
• Kiesel site source
• Porffor site source
• Nova site source
• NJS site source
• Request more in GitHub issues!

Transpilers

• Babel (old Node and Babel + core-js)
• SWC (old Node and SWC + core-js)
• Sucrase (old Node and Sucrase + core-js)

Engine variants

• V8 with experimental opts (--harmony etc)
• SM with experimental opts
• Stable versions of engines

Features to do

• Preview test262 PRs (changes only)
• Data/graph over time
• Diff individual engines(/runs)
• Lookup JS runtime version -> JS engine version (Node, Deno, Bun, etc)
• Measure times for each test, have "result view" and "time view"

Local build

Note: You need a GitHub API token (PAT) in your env as GITHUB_TOKEN

1. Clone repo
2. Run scripts/downloadOldResults.mjs and scripts/extractResults.sh (downloads results from latest build)
3. node site/generate.mjs (might take a minute or two)
4. Start a HTTP server in site and open it in your browser