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 [import-bytes] add initial tests for import bytes proposal web-platform-tests/wpt#56938
  • Submit patch to whatwg/html [import-bytes] add import bytes whatwg/html#11657 (blocked on immutable arraybuffer)
  • Submit patch to whatwg/fetch [import-bytes] add bytes sec-fetch-dest and accept whatwg/fetch#1912
  • Submit patch to w3c/webappsec-csp [import-bytes] add bytes destination w3c/webappsec-csp#803
• Depends on immutable array buffer
  • Path to Stage 4! proposal-immutable-arraybuffer#1
  • Add [AllowImmutable] extended attribute for immutable array buffers and views whatwg/webidl#1487
  • https://chromestatus.com/feature/5071083751473152
  • https://issues.chromium.org/issues/450237486
• 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)
    • Import Bytes mozilla/standards-positions#1367
    • Import Bytes WebKit/standards-positions#626
• Request feedback at module harmony meeting
• Request stage 3 at plenary meeting, perhaps 2026-03