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* 仕様書

[REFS[
- [12] [CITE@en-US-x-hixie[HTML Standard]] ([TIME[2017-06-16 08:10:52 +09:00]]) <https://html.spec.whatwg.org/#attr-link-as>
]REFS]

* 属性値

[13] [CODE(HTMLa)@en[as][<link as>]] [[属性]]は、
[[列挙属性]]です。 [SRC[>>12]]

[14] 本属性は、 [[potential destination]] が[[属性値]] = 状態として定義されています。
[[欠値既定値]]と[[非妥当値既定値]]はありません。 [SRC[>>12]]

* 歴史

[6] [CITE@en[Abort when an invalid `as` value is encountered · w3c/preload@0415ea1]]
([TIME[2016-02-19 15:49:37 +09:00]] 版)
<https://github.com/w3c/preload/commit/0415ea1086f82868aa1719d4d0da8d8dfaf8ef4c>

[1] [CITE@en[Add ''''''[''''''CEReactions'''''']'''''' annotation to as · w3c/preload@b632000]]
([TIME[2016-05-01 14:03:37 +09:00]] 版)
<https://github.com/w3c/preload/commit/b632000d8bd32118d3b7833b7c0caca044329072>

[2] [CITE@en[as=media for video, audio. closes #64]]
( ([[igrigorik]]著, [TIME[2016-05-08 01:07:23 +09:00]]))
<https://github.com/w3c/preload/commit/90279dfdbb2d7555616dfca91efa839e9cf5b702>

[3] [CITE@en[Remove text indicating invalid as values are converted to an empty value]]
( ([[yoavweiss]]著, [TIME[2016-06-07 17:58:59 +09:00]]))
<https://github.com/w3c/preload/commit/7f369ce15293b6705d55ab58dc67e501847af08a>

[4] [CITE@en[Add the "as" attribute for the <link> element]]
([[sideshowbarker]]著, [TIME[2016-07-01 04:20:03 +09:00]])
<https://github.com/whatwg/html/commit/2381476ea6143d835f08a3a82e6634b215cb60ea>

[5] [CITE@en[Case-sensitive as="" for <link> is weird · Issue #1665 · whatwg/html]]
([TIME[2016-08-15 13:38:34 +09:00]])
<https://github.com/whatwg/html/issues/1665>

[7] [CITE@en[Added required language]]
([[yoavweiss]]著, [TIME[2016-10-31 19:45:48 +09:00]])
<https://github.com/w3c/preload/commit/e0b5c1e2dfa4ac2b70fef79b76b096bfdcb27b45>

[8] [CITE@en[Review changes]]
([[yoavweiss]]著, [TIME[2016-11-01 01:12:18 +09:00]])
<https://github.com/w3c/preload/commit/5b8a24a41c54f06a26e8287ab4332584c77ab351>

[9] [CITE@en[Make <link>'s as="" attribute case-insensitive]]
([[domenic]]著, [TIME[2017-04-26 05:59:59 +09:00]])
<https://github.com/whatwg/html/commit/9c7da4998f005c1799b04f452cb6c4a618f2d42e>

[10] [CITE@en[Update <link>'s processing model to work well for preload]]
([[domenic]]著, [TIME[2017-06-03 06:33:20 +09:00]])
<https://github.com/whatwg/html/commit/eb5d1cc61cdfe7d946618cc39a1f7c3e5904a03b>

[11] [CITE@en[Merge pull request #91 from domenic/fix-attribute-definition]]
([[yoavweiss]]著, [TIME[2017-06-03 06:36:38 +09:00]])
<https://github.com/w3c/preload/commit/01d2c0c7c44ee6340e4af179c9f3387f3d8a092f>

[15] [CITE@en[Replace most of the "link extensions" section with a non-normative no…]]
([[yoavweiss]]著, [TIME[2017-08-23 15:31:21 +09:00]])
<https://github.com/w3c/preload/commit/f7ad55bb510b174f9ca36218118b38930cd298d6>

[16] [CITE@en[Replace most of the "link extensions" section with a non-normative note by yoavweiss · Pull Request #109 · w3c/preload]]
([TIME[2017-08-24 11:58:07 +09:00]])
<https://github.com/w3c/preload/pull/109>

[17] [CITE@en[Link element interface extensions · Issue #95 · w3c/preload]]
([TIME[2017-08-24 11:58:14 +09:00]])
<https://github.com/w3c/preload/issues/95>

[18] [CITE@en[Link preload's `as` value should impact Accept headers · Issue #580 · whatwg/fetch]]
([TIME[2017-08-24 16:58:24 +09:00]])
<https://github.com/whatwg/fetch/issues/580>

[19] [CITE@en[Add <link> rel="modulepreload"]]
([[domenic]]著, [TIME[2017-12-15 05:04:40 +09:00]])
<https://github.com/whatwg/html/commit/7c28027b80208aa6b126fa7b086c44877f584178>

[20] [CITE@en[preload, destinations, and module scripts · Issue #486 · whatwg/fetch]]
([TIME[2018-03-20 15:18:01 +09:00]])
<https://github.com/whatwg/fetch/issues/486>

[21] [CITE@en[Add <link> rel="modulepreload" by domenic · Pull Request #2383 · whatwg/html]]
([TIME[2018-03-20 15:24:08 +09:00]])
<https://github.com/whatwg/html/pull/2383>

[22] [CITE@en[Request.destination for `<link rel=prefetch>` · Issue #658 · whatwg/fetch]]
([TIME[2018-05-02 13:08:32 +09:00]])
<https://github.com/whatwg/fetch/issues/658>

[23] [CITE@en[Processing model for `as`? · Issue #66 · w3c/resource-hints]]
([TIME[2018-05-02 13:13:06 +09:00]])
<https://github.com/w3c/resource-hints/issues/66>

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