legend 要素型 (HTML, XHTML 1)

[1] legnend は、 fieldset に題captionを割当てます。

[2] 仕様書:

HTML 4 (Web Forms 1.0)
- 17.10 Adding structure to forms: the FIELDSET and LEGEND elements IW:HTML4:"interact/forms.html#edef-LEGEND"
Web Forms 2.0
- 3.3. Changes to existing controls IW:WF2:"#changes"

[3]

状態

W3C 勧告

名前空間URI

http://www.w3.org/1999/xhtml

局所名

legend (銘legendより)

開始タグ

必須

終了タグ

必須

内容模型

(%inline)*

出現できる文脈

fieldset の最初に1つ (必須)

属性

属性名	属性値	既定値	説明	出典
`accesskey`	`%Character`			[HTML 4]
`align`			配置	[HTML 4] 非推奨
`class`		(なし)	級	[HTML 4] %coreattrs ⊂ %attrs, [XHTML 1] Core ⊂ Common
`dir`			書字方向	[HTML 4] %i18n ⊂ %attrs, [XHTML 1] I18N ⊂ Common
`form`			廃止	~~Web Applications 1.0~~
`id`	`ID`	(なし)	一意識別子	[HTML 4] %coreattrs ⊂ %attrs, [XHTML 1] Core ⊂ Common
`lang`			自然言語	[HTML 4] %i18n ⊂ %attrs
`xml:lang`			自然言語	[XHTML 1] I18N ⊂ Common
`onclick`	`%Script`	(なし)		[HTML 4] %events ⊂ %attrs, [XHTML 1] Events ⊂ Common
`ondblclick`	`%Script`	(なし)		[HTML 4] %events ⊂ %attrs, [XHTML 1] Events ⊂ Common
`onkeydown`	`%Script`	(なし)		[HTML 4] %events ⊂ %attrs, [XHTML 1] Events ⊂ Common
`onkeypress`	`%Script`	(なし)		[HTML 4] %events ⊂ %attrs, [XHTML 1] Events ⊂ Common
`onkeyup`	`%Script`	(なし)		[HTML 4] %events ⊂ %attrs, [XHTML 1] Events ⊂ Common
`onmousedown`	`%Script`	(なし)		[HTML 4] %events ⊂ %attrs, [XHTML 1] Events ⊂ Common
`onmousemove`	`%Script`	(なし)		[HTML 4] %events ⊂ %attrs, [XHTML 1] Events ⊂ Common
`onmouseout`	`%Script`	(なし)		[HTML 4] %events ⊂ %attrs, [XHTML 1] Events ⊂ Common
`onmouseover`	`%Script`	(なし)		[HTML 4] %events ⊂ %attrs, [XHTML 1] Events ⊂ Common
`onmouseup`	`%Script`	(なし)		[HTML 4] %events ⊂ %attrs, [XHTML 1] Events ⊂ Common
`style`			スタイル情報	[HTML 4] %coreattrs ⊂ %attrs, [XHTML 1] Style ⊂ Common
`title`			注釈的題	[HTML 4] %coreattrs ⊂ %attrs, [XHTML 1] Core ⊂ Common

内容モデル

[6] Web Forms 2.0 のメモ IW:WF2:"#emptyElements" によれば、 HTML 4 では legend は最低1文字の内容が必要だとされています。

これは HTML 4 のどの部分が根拠でしょうか?

[7] Web Forms 2.0 では、 legend 要素は空にして構いません。しかし、利用者の混乱を防ぐため、空かつ可視な状態は避けるようにするべきです。 WF2 2.3

アクセス可能性

[4] legend は非視覚レンダリングでのアクセス可能性を高めます HTML 4 17.10。

歴史

HTML4

[30] Design Issues for HTML Forms, 1999-02-04T17:41:10.000Z, 2024-08-25T03:32:27.452Z https://www.w3.org/TR/WD-forms-960308.html

[216]

HTML要素概説

要素名

is

日付

1995-03-08

説明

1996-03-08付 W3C 文書で is が提案されていた。現在の legend に近いが、ラベルと内容を区切るものだった。

出典

Design Issues for HTML Forms, W3C, Working Draft, 08-Mar-961996-03-08, 1999-02-04T17:41:10.000Z, 2024-08-25T03:33:02.026Z https://www.w3.org/TR/WD-forms-960308.html

[32] Cougar では caption が使われていました。 HTML 4.0 になって legend になりました。 fieldset

HTML5

[31] the legend element (if anyone has a better idea of how to classify th…, Hixie, 2006-11-26 15:29:44 +09:00, 2024-09-01T12:25:41.000Z https://github.com/whatwg/html/commit/967ec89c0f160d612c30aa584f271674f7089f2f#diff-41cf6794ba4200b839c53531555f0f3998df4cbb01a4d5cb0b94e3ca5e23947d

[48]

HTML要素概説

要素名

legend

日付

2006-11-26

説明

2006-11-26、 HTML5 は legend を定義した。現行仕様である。

出典

HTML5 r363, Hixie, 2006-11-26 15:29:44 +09:00, 2024-09-01T12:25:41.000Z https://github.com/whatwg/html/commit/967ec89c0f160d612c30aa584f271674f7089f2f

参照

summary

参照

figcaption

参照

dt

[77] (X)HTML5 Tracking (2009-10-12 19:07:38 +09:00 版) http://html5.org/tools/web-apps-tracker?from=4114&to=4115

[78] IRC logs: freenode / #whatwg / 20090903 (2009-10-17 12:08:54 +09:00 版) http://krijnhoetmer.nl/irc-logs/whatwg/20090903#l-31

[79] IRC logs: freenode / #whatwg / 20100211 (2010-02-13 15:54:31 +09:00 版) http://krijnhoetmer.nl/irc-logs/whatwg/20100211#l-145

[80] Web Applications 1.0 r5504 make the legend rendering requirements only apply when they make senseFixing http://www.w3.org/Bugs/Public/show_bug.cgi?id=10547 ( (2010-09-26 09:52:00 +09:00 版)) http://html5.org/tools/web-apps-tracker?from=5503&to=5504

[81] Web Applications 1.0 r7987 Make <legend> styles match reality. ( (2013-06-19 07:37:00 +09:00 版)) http://html5.org/tools/web-apps-tracker?from=7986&to=7987

[8] Editorial: Cross-reference DOM "child" where appropriate in rendering (zcorpan著, 2016-09-20 20:16:41 +09:00) https://github.com/whatwg/html/commit/e8c91c05edc8d6cdb33fdd5452e052359d40490b

[9] The "rendered legend" creates a new block formatting context (zcorpan著, 2017-06-07 21:30:20 +09:00) https://github.com/whatwg/html/commit/7ef15998b3a968f0fd7eb30dc126427e13349dbe

[10] Refer to a fieldset's legend as a caption to reduce confusion (zcorpan著, 2018-08-21 19:16:49 +09:00) https://github.com/whatwg/html/commit/169413911523380c64d5ec66a60bed1992bdc7ca

[11] Name of <fieldset> group given by <legend> and <fieldset name=""> confusable · Issue #3702 · whatwg/html (2018-09-04 16:25:54 +09:00) https://github.com/whatwg/html/issues/3702

[12] Refer to a fieldset's legend as a caption to reduce confusion by zcorpan · Pull Request #3951 · whatwg/html (2018-09-04 16:26:32 +09:00) https://github.com/whatwg/html/pull/3951

[13] Tweak how accesskey on legend works (zcorpan著, 2018-09-07 06:25:22 +09:00) https://github.com/whatwg/html/commit/aa374be03beebf25ed33022846c2d03d3ea03484

[14] focus() on a non-focusable legend delegates focus in WebKit/Chromium · Issue #3950 · whatwg/html (2018-10-14 17:52:33 +09:00) https://github.com/whatwg/html/issues/3950

[15] Tweak how accesskey on legend works by zcorpan · Pull Request #3987 · whatwg/html (2018-10-14 17:53:06 +09:00) https://github.com/whatwg/html/pull/3987

[16] Clarify which legend/figcaption/caption element to use (#146) (@zcorpan著, 2018-09-08 05:46:12 +09:00) https://github.com/w3c/html-aam/commit/f311fe023964e1536e2f7d389aa02da6a824a741

[17] Unclear which legend element to be used as accessible name for fieldset · Issue #145 · w3c/html-aam (2018-10-17 13:00:43 +09:00) https://github.com/w3c/html-aam/issues/145

[18] Clarify which legend/figcaption/caption element to use by zcorpan · Pull Request #146 · w3c/html-aam (2018-10-17 13:02:19 +09:00) https://github.com/w3c/html-aam/pull/146

[19] Revamp how fieldset and legend rendering is defined (zcorpan著, 2018-09-20 03:04:40 +09:00) https://github.com/whatwg/html/commit/6fbb7ff8fbe1c76506145ba8ffce690224be66e0

[20] Define whether fieldset's legend should mask border-image · Issue #3930 · whatwg/html (2018-10-19 17:11:19 +09:00) https://github.com/whatwg/html/issues/3930

[21] Define how margin-top on fieldset's legend works · Issue #3929 · whatwg/html (2018-10-19 17:11:42 +09:00) https://github.com/whatwg/html/issues/3929

[22] fieldset's "rendered legend" should force used value of display to block · Issue #3927 · whatwg/html (2018-10-19 17:12:11 +09:00) https://github.com/whatwg/html/issues/3927

[23] fieldset's legend should probably inherit alignment · Issue #3913 · whatwg/html (2018-10-19 17:12:23 +09:00) https://github.com/whatwg/html/issues/3913

[24] The definition of "rendered legend" should use the box tree, or at least the flat tree. · Issue #3331 · whatwg/html (2018-10-19 17:13:04 +09:00) https://github.com/whatwg/html/issues/3331

[25] Unresolvable dependencies in determining the rendered fieldset legend · Issue #2756 · whatwg/html (2018-10-19 17:13:24 +09:00) https://github.com/whatwg/html/issues/2756

[26] Revamp how fieldset and legend rendering is defined by zcorpan · Pull Request #3934 · whatwg/html (2018-10-19 17:13:59 +09:00) https://github.com/whatwg/html/pull/3934

[27] Refer to a fieldset's legend as a caption to reduce confusion (zcorpan著, 2018-08-21 19:16:49 +09:00) https://github.com/whatwg/html/commit/169413911523380c64d5ec66a60bed1992bdc7ca

[28] Name of <fieldset> group given by <legend> and <fieldset name=""> confusable · Issue #3702 · whatwg/html (2019-03-04 16:40:41 +09:00) https://github.com/whatwg/html/issues/3702

[29] Refer to a fieldset's legend as a caption to reduce confusion by zcorpan · Pull Request #3951 · whatwg/html (2019-03-04 16:41:04 +09:00) https://github.com/whatwg/html/pull/3951

legend 要素型 (HTML, XHTML 1)

内容モデル

アクセス可能性

関連

歴史

HTML4

HTML5