207207●●options
208208
209209spec_title:Fetch
210- spec_date:2026-05-08
211- trans_update:2026-05-14
210+ spec_date:2026-06-05
211+ trans_update:2026-06-11
212212source_checked:250918
213213spec_status:LS
214214original_url:https://fetch.spec.whatwg.org/
555555I.ServiceWorkerGlobalScope:~SW1#serviceworkerglobalscope
556556I.ReferrerPolicy:~REFERRER-POLICY#enumdef-referrerpolicy
557557I.EventSource:~HTMLsse#eventsource
558+ I.TextDecoderStream:~ENCODING#textdecoderstream
558559
559560
560561I.WindowOrWorkerGlobalScope:~HTMLGAPI#windoworworkerglobalscope
11581159RS.~byte読取り~support付きで設定しておく:~STREAMS#readablestream-set-up-with-byte-reading-support
11591160 取消~algo:~STREAMS#readablestream-set-up-cancelalgorithm
11601161 ~pull~algo:~STREAMS#readablestream-set-up-pullalgorithm
1162+ RS.設定しておく:~STREAMS#readablestream-set-up
11611163RS.読取器を取得する:~STREAMS#readablestream-get-a-reader
11621164RS.~proxyを作成する:~STREAMS#readablestream-create-a-proxy
11631165RS.~byte列から~pullする:~STREAMS#readablestream-pull-from-bytes
11711173RS.妨げられている:~STREAMS#is-readable-stream-disturbed
11721174RS.~lockされている:~STREAMS#readablestream-locked
11731175RS.もっと~dataが必要:~STREAMS#readablestream-need-more-data
1176+ RS.通して~pipeする:~STREAMS#readablestream-pipe-through
11741177
11751178RSR.~chunkを読取る:~STREAMS#readablestreamdefaultreader-read-a-chunk
11761179RSR.すべての~byteを読取る:~STREAMS#readablestreamdefaultreader-read-all-bytes
11771180
1178- RS.通して~pipeする:~STREAMS#readablestream-pipe-through
1179-
11801181TS.設定しておく:~STREAMS#transformstream-set-up
11811182TS.~chunkを~enqueueする:~STREAMS#transformstream-enqueue
11821183恒等変換~stream:~STREAMS#identity-transform-stream
1184+ 形式変換:~STREAMS#generictransformstream-transform
11831185
11841186
11851187 ●Fetch API
14431445~UTF-8符号化する:~ENCODING#utf-8-encode
14441446~UTF-8復号する:~ENCODING#utf-8-decode
14451447~BOMはそのままに~UTF-8復号する:~ENCODING#utf-8-decode-without-bom
1448+ ~text復号器~streamを設定しておく:~ENCODING#set-up-a-text-decoder-stream
14461449
14471450~URL:~URL1#concept-url
14481451 誤)~TR/pub-manifest/#dfn-url
20072010 %環境:environment
20082011 %模倣された言語:emulatedLanguage
20092012 %符号化-済みな模倣された言語:encodedEmulatedLanguage
2013+ %空な~stream:emptyStream
2014+ %復号器:decoder
20102015
20112016 ●URL
20122017hostname::::ホスト名
25752580 広く:widely-
25762581 見かけ:look
25772582 一定:constant
2583+ 有無:presence
25782584
25792585●●ref_key_map
25802586ORIGIN:RFC6454
27342740
27352741Commits:
27362742 https://github.com/whatwg/fetch/commits
2737- <a href="https://fetch.spec.whatwg.org/commit-snapshots/301650c6d9ee932f126d6598262966242eb3d838 /" id="commit-snapshot-link">Snapshot as of this commit</a>
2743+ <a href="https://fetch.spec.whatwg.org/commit-snapshots/30140d05af57eb9d24d43a2c18f108abac7964ce /" id="commit-snapshot-link">Snapshot as of this commit</a>
27382744 <a href="https://twitter.com/fetchstandard">@fetchstandard</a>
27392745
27402746Tests:
@@ -21776,6 +21782,7 @@ <h3 title="Body mixin">5.3. `Body^I ~mixin</h3>
2177621782 [`NewObject$] `Promise$<`FormData$I> `formData$m();
2177721783 [`NewObject$] `Promise$<`any$> `json$m();
2177821784 [`NewObject$] `Promise$<`USVString$> `text$m();
21785+ [`NewObject$] `ReadableStream$I `textStream$m();
2177921786};
2178021787</pre>
2178121788
@@ -21892,6 +21899,14 @@ <h3 title="Body mixin">5.3. `Body^I ~mixin</h3>
2189221899充足される~promiseを返す。
2189321900◎
2189421901Returns a promise fulfilled with requestOrResponse’s body as string.
21902+ </dd>
21903+
21904+ <dt>%requestOrResponse . `textStream()$m</dt>
21905+ <dd>
21906+ %requestOrResponse の本体を文字列~chunkたちとして伴う
21907+ `ReadableStream$I ~objを返す。
21908+ ◎
21909+ Returns a ReadableStream object with requestOrResponse’s body as string chunks.
2189521910</dd>
2189621911</dl>
2189721912
@@ -22229,10 +22244,10 @@ <h3 title="Body mixin">5.3. `Body^I ~mixin</h3>
2222922244`name$mF 属性の値 ~SET `filename^bl ~parameterの値
2223022245</li>
2223122246 <li>
22232- `type$mF 属性の値 ~SET %部位 内に `Content-Type$h ~headerが[
22247+ `type$mF 属性の値 ~SET %部位 内に `Content-Type$h ~headerが
22248+ ⇒#
2223322249在るならば その~header値 /
2223422250無いならば `text/plain^bl ( `RFC7578$r § 4.4 に定義される既定)
22235- ]
2223622251</li>
2223722252 </ul>
2223822253◎
@@ -22251,8 +22266,9 @@ <h3 title="Body mixin">5.3. `Body^I ~mixin</h3>
2225122266
2225222267<p class="note">注記:
2225322268これは、[
22254- `Content-Type$h ~header / `charset^bl ~parameter
22255- ]の有無やその値に関わらず行われる。
22269+ `Content-Type$h ~headerの有無やその値,
22270+ `charset^bl ~parameterの有無やその値
22271+ ]に関わらず,行われる。
2225622272◎
2225722273This is done regardless of the presence or the value of a `Content-Type` header and regardless of the presence or the value of a `charset` parameter.
2225822274</p>
@@ -22352,6 +22368,88 @@ <h3 title="Body mixin">5.3. `Body^I ~mixin</h3>
2235222368◎
2235322369The text() method steps are to return the result of running consume body with this and UTF-8 decode.
2235422370</p>
22371+ </div>
22372+
22373+ <div class="algo">
22374+ <p>
22375+ `textStream()@m
22376+ ~method手続きは:
22377+ ◎
22378+ The textStream() method steps are:
22379+ </p>
22380+ <ol>
22381+ <li>
22382+ ~IF[
22383+ コレは`利用-不能$Bdである
22384+ ]
22385+ ⇒
22386+ ~THROW `TypeError$E
22387+ ◎
22388+ If this is unusable, then throw a TypeError.
22389+ </li>
22390+ <li>
22391+ <p>
22392+ ~IF[
22393+ コレの`本体$Bd ~EQ ~NULL
22394+ ]:
22395+ ◎
22396+ If this’s body is null:
22397+ </p>
22398+ <ol>
22399+ <li>
22400+ %空な~stream ~LET `新たな~obj$( `ReadableStream$I, コレに`関連な~realm$ )
22401+ ◎
22402+ Let emptyStream be a new ReadableStream in this’s relevant realm.
22403+ </li>
22404+ <li>
22405+ %空な~stream を`設定しておく$RS()
22406+ ◎
22407+ Set up emptyStream.
22408+ </li>
22409+ <li>
22410+ %空な~stream を`~closeする$RS()
22411+ ◎
22412+ Close emptyStream.
22413+ </li>
22414+ <li>
22415+ ~RET %空な~stream
22416+ ◎
22417+ Return emptyStream.
22418+ </li>
22419+ </ol>
22420+ </li>
22421+ <li>
22422+ %~stream ~LET コレの`本体$Bdの`~stream$bd
22423+ ◎
22424+ Let stream be this’s body’s stream.
22425+ </li>
22426+ <li>
22427+ %復号器 ~LET `新たな~obj$( `TextDecoderStream$I, コレに`関連な~realm$ )
22428+ ◎
22429+ Let decoder be a new TextDecoderStream object in this’s relevant realm.
22430+ </li>
22431+ <li>
22432+ <p>
22433+ `~text復号器~streamを設定しておく$( %復号器, `~UTF-8$enc )
22434+ ◎
22435+ Set up decoder with UTF-8.
22436+ </p>
22437+
22438+ <p class="note">注記:
22439+ これは、[
22440+ `Content-Type$h ~headerの有無やその値,
22441+ `charset^bl ~parameterの有無やその値
22442+ ]に関わらず,行われる。
22443+ ◎
22444+ This is done regardless of the presence or the value of a `Content-Type` header and regardless of the presence or the value of a `charset` parameter.
22445+ </p>
22446+ </li>
22447+ <li>
22448+ ~RET %~stream を %復号器 【の`形式変換$】を`通して~pipeする$RS
22449+ ◎
22450+ Return the result of stream, piped through decoder.
22451+ </li>
22452+ </ol>
2235522453</div>
2235622454
2235722455 </section>
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