Road to Stage 3

[styfle]

List of TODO items before we can request stage 3.

• Validate the design of the feature through the development of a rigorous and comprehensive test suite
  • Submit to test262 [import-bytes] add initial tests for import bytes proposal test262#4648
  • Submit tests to wpt Add initial tests for import bytes web-platform-tests/wpt#56938
  • Submit patch to whatwg/html add import bytes whatwg/html#11657
  • Submit patch to whatwg/fetch (only if we want to add a new sec-fetch-dest)
  • Submit patch to w3c/webappsec-csp (only if we want to add a new sec-fetch-dest)
• Depends on immutable array buffer
  • Add [AllowImmutable] extended attribute for immutable array buffers and views whatwg/webidl#1487
• Develop spec-compliant prototypes to validate implementability, as necessary, or aid in test development
  • Deno 2.4
  • Bun
  • Turbopack
  • Webpack
  • esbuild 0.25.11
  • Rspack
  • Node.js
  • TypeScript (maybe want to wait for stage 3) Follow up with TypeScript team once Stage 3 #23 (comment)
  • Browsers? (might want to wait for stage 3)
• Request feedback at module harmony meeting
• Request stage 3 at plenary meeting, perhaps 2026-01