Fetch API Updates

We pull the official changelog, sanitize it, and organize it into a uniform list. Follow each entry URL to read the original on the vendor site.

1. Aug 25, 2026
   Include end time & render-blocking in opaque responses

   3 days ago
2. Aug 20, 2026
   Editorial: fix typos in deferred fetching quota section

   8 days ago
3. Jul 2, 2026
   Meta: make methods a required ID

   about 2 months ago
4. Jun 25, 2026
   Add TAO destination check for navigation redirect chains

   2 months ago
5. Jun 21, 2026
   Review Draft Publication: June 2026

   2 months ago
6. Jun 5, 2026
   Add a textStream() method to the Body mixin

   3 months ago
7. May 8, 2026
   Define ABNF for origin-or-null

   4 months ago
8. Apr 26, 2026
   Only consider pending fetch-later requests for deferred fetch quota

   4 months ago
9. Apr 21, 2026
   Add WebDriver BiDi network logging with stable request IDs

   4 months ago
10. Apr 1, 2026
    Add "text" destination type, for JavaScript text imports

    5 months ago
11. Mar 15, 2026
    Meta: update repository files

    6 months ago
12. Jan 28, 2026
    Add WebTransport-hashes to request, wired down to create a connection

    7 months ago
13. Jan 20, 2026
    Block 416 alongside 206

    7 months ago
14. Jan 13, 2026
    Add quota & requested to QuotaExceededError

    8 months ago
15. Dec 19, 2025
    Editorial: fix typo

    8 months ago
16. Dec 15, 2025
    Review Draft Publication: December 2025

    9 months ago
17. Dec 3, 2025
    Bypass blob URL partitioning for top-level self fetches

    9 months ago
18. Nov 28, 2025
    Align with changes to Service Worker's handle fetch

    9 months ago
19. Nov 19, 2025
    WebDriver BiDi: override Accept-Language header

    9 months ago
20. Add "webtransport" request mode

    9 months ago

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