Transfer-Encoding Header: Remove mention of trailers value#40376
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hamishwillee merged 2 commits intomdn:mainfrom Jul 16, 2025
Merged
Transfer-Encoding Header: Remove mention of trailers value#40376hamishwillee merged 2 commits intomdn:mainfrom
trailers value#40376hamishwillee merged 2 commits intomdn:mainfrom
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`trailers` is only valid for the `TE` header. `Transfer-Encoding: trailers` is not a thing. There already is a (correct) note on https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/TE, so this just needs to be removed. The PR that introduced this (mdn#22032) correctly cites the RFC for `TE`, but then mixes up TE and Transfer-Encoding.
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added
Content:HTTP
| - {{HTTPHeader("Accept-Encoding")}} | ||
| - {{HTTPHeader("Content-Encoding")}} | ||
| - {{HTTPHeader("Content-Length")}} | ||
| - Header fields that regulate the use of trailers: {{HTTPHeader("TE")}} (requests) and {{HTTPHeader("Trailer")}} (responses). |
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Not relevant if trailers is not allowed.
hamishwillee
approved these changes
Jul 16, 2025
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Description
The page for
Transfer-Encodingcurrently incorrectly mentions a permissibletrailersvalue for HTTP/2. Buttrailersis only valid for theTEheader.Transfer-Encoding: trailersis not a thing. There already is a (correct) note on https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/TE.The PR that introduced this (#22032) correctly cites the RFC for
TE, but then mixes up TE and Transfer-Encoding.Additional details
From https://datatracker.ietf.org/doc/html/rfc9113#section-8.2.2 (emphasis mine):
Related issues and pull requests
Relates to #22032