Annotation of html5/spec-author-view/the-button-element.html, revision 1.407
1.354 mike 1: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"><!-- when publishing, change bits marked ZZZ
2: ZZZ: Set PUB to 1 for TR/ drafts, 0 for dev drafts; PUB-Y lines are used if it's 1 and PUB-N lines if it's 0.
3: ZZZ: Set YEAR, SHORTDAY (month/day), and LONGDAY accordingly. They are used by the INSERT FOO bits below.
4: --><html class="split chapter" lang="en-US-x-Hixie"><meta content="text/html; charset=ascii" http-equiv="Content-Type"><title>4.10.8 The button element — HTML5 (Edition for Web Authors)</title><meta content="width=device-width;" name="viewport"><meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible"><link href="whatwg.css" rel="stylesheet"><style type="text/css">
1.1 mike 5: pre { margin-left: 2em; white-space: pre-wrap; }
6: h2 { margin: 3em 0 1em 0; }
7: h3 { margin: 2.5em 0 1em 0; }
8: h4 { margin: 2.5em 0 0.75em 0; }
9: h5, h6 { margin: 2.5em 0 1em; }
10: h1 + h2, h1 + h2 + h2 { margin: 0.75em 0 0.75em; }
11: h2 + h3, h3 + h4, h4 + h5, h5 + h6 { margin-top: 0.5em; }
12: p { margin: 1em 0; }
13: hr:not(.top) { display: block; background: none; border: none; padding: 0; margin: 2em 0; height: auto; }
14: dl, dd { margin-top: 0; margin-bottom: 0; }
15: dt { margin-top: 0.75em; margin-bottom: 0.25em; clear: left; }
16: dt + dt { margin-top: 0; }
17: dd dt { margin-top: 0.25em; margin-bottom: 0; }
18: dd p { margin-top: 0; }
19: dd dl + p { margin-top: 1em; }
20: dd table + p { margin-top: 1em; }
21: p + * > li, dd li { margin: 1em 0; }
22: dt, dfn { font-weight: bold; font-style: normal; }
23: dt dfn { font-style: italic; }
24: pre, code { font-size: inherit; font-family: monospace; font-variant: normal; }
25: pre strong { color: black; font: inherit; font-weight: bold; background: yellow; }
26: pre em { font-weight: bolder; font-style: normal; }
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28: var sub { vertical-align: bottom; font-size: smaller; position: relative; top: 0.1em; }
29: table { border-collapse: collapse; border-style: hidden hidden none hidden; }
1.34 mike 30: table thead, table tbody { border-bottom: solid; }
1.1 mike 31: table tbody th:first-child { border-left: solid; }
32: table tbody th { text-align: left; }
33: table td, table th { border-left: solid; border-right: solid; border-bottom: solid thin; vertical-align: top; padding: 0.2em; }
34: blockquote { margin: 0 0 0 2em; border: 0; padding: 0; font-style: italic; }
35:
36: .bad, .bad *:not(.XXX) { color: gray; border-color: gray; background: transparent; }
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38: .matrix { margin-left: 2em; }
39: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
40: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
41: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
42:
43: .toc dfn, h1 dfn, h2 dfn, h3 dfn, h4 dfn, h5 dfn, h6 dfn { font: inherit; }
44: img.extra { float: right; }
45: pre.idl { border: solid thin; background: #EEEEEE; color: black; padding: 0.5em 1em; }
46: pre.idl :link, pre.idl :visited { color: inherit; background: transparent; }
47: pre.css { border: solid thin; background: #FFFFEE; color: black; padding: 0.5em 1em; }
48: pre.css:first-line { color: #AAAA50; }
1.23 mike 49: dl.domintro { color: green; margin: 2em 0 2em 2em; padding: 0.5em 1em; border: none; background: #DDFFDD; }
1.1 mike 50: hr + dl.domintro, div.impl + dl.domintro { margin-top: 2.5em; margin-bottom: 1.5em; }
51: dl.domintro dt, dl.domintro dt * { color: black; text-decoration: none; }
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53: dl.domintro dd p { margin: 0.5em 0; }
54: dl.switch { padding-left: 2em; }
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56: dl.switch > dt:before { content: '\21AA'; padding: 0 0.5em 0 0; display: inline-block; width: 1em; text-align: right; line-height: 0.5em; }
57: dl.triple { padding: 0 0 0 1em; }
58: dl.triple dt, dl.triple dd { margin: 0; display: inline }
59: dl.triple dt:after { content: ':'; }
60: dl.triple dd:after { content: '\A'; white-space: pre; }
61: .diff-old { text-decoration: line-through; color: silver; background: transparent; }
62: .diff-chg, .diff-new { text-decoration: underline; color: green; background: transparent; }
63: a .diff-new { border-bottom: 1px blue solid; }
64:
65: h2 { page-break-before: always; }
66: h1, h2, h3, h4, h5, h6 { page-break-after: avoid; }
67: h1 + h2, hr + h2.no-toc { page-break-before: auto; }
68:
1.306 mike 69: p > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]),
70: li > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]), { border-bottom: solid #9999CC; }
1.1 mike 71:
72: div.head { margin: 0 0 1em; padding: 1em 0 0 0; }
73: div.head p { margin: 0; }
74: div.head h1 { margin: 0; }
75: div.head .logo { float: right; margin: 0 1em; }
76: div.head .logo img { border: none } /* remove border from top image */
77: div.head dl { margin: 1em 0; }
78: div.head p.copyright, div.head p.alt { font-size: x-small; font-style: oblique; margin: 0; }
79:
80: body > .toc > li { margin-top: 1em; margin-bottom: 1em; }
81: body > .toc.brief > li { margin-top: 0.35em; margin-bottom: 0.35em; }
82: body > .toc > li > * { margin-bottom: 0.5em; }
83: body > .toc > li > * > li > * { margin-bottom: 0.25em; }
84: .toc, .toc li { list-style: none; }
85:
86: .brief { margin-top: 1em; margin-bottom: 1em; line-height: 1.1; }
87: .brief li { margin: 0; padding: 0; }
88: .brief li p { margin: 0; padding: 0; }
89:
90: .category-list { margin-top: -0.75em; margin-bottom: 1em; line-height: 1.5; }
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96:
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102: .annotation :link, .annotation :visited { color: inherit; }
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117: .bookkeeping { font-size: 0.8em; margin: 2em 0; }
118: .bookkeeping p { margin: 0.5em 2em; display: list-item; list-style: square; }
1.132 mike 119: .bookkeeping dt { margin: 0.5em 2em 0; }
120: .bookkeeping dd { margin: 0 3em 0.5em; }
1.1 mike 121:
122: h4 { position: relative; z-index: 3; }
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124: .element {
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129: border-left: solid #9999FF 0.25em;
130: position: relative;
131: z-index: 1;
132: }
133: .element:before {
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135: z-index: 2;
136: top: 0;
137: left: -1.15em;
138: height: 2em;
139: width: 0.9em;
140: background: #EEEEFF;
141: content: ' ';
142: border-style: none none solid solid;
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145: }
146:
147: .example { display: block; color: #222222; background: #FCFCFC; border-left: double; margin-left: 2em; padding-left: 1em; }
148: td > .example:only-child { margin: 0 0 0 0.1em; }
149:
150: ul.domTree, ul.domTree ul { padding: 0 0 0 1em; margin: 0; }
151: ul.domTree li { padding: 0; margin: 0; list-style: none; position: relative; }
152: ul.domTree li li { list-style: none; }
153: ul.domTree li:first-child::before { position: absolute; top: 0; height: 0.6em; left: -0.75em; width: 0.5em; border-style: none none solid solid; content: ''; border-width: 0.1em; }
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155: ul.domTree span { font-style: italic; font-family: serif; }
156: ul.domTree .t1 code { color: purple; font-weight: bold; }
157: ul.domTree .t2 { font-style: normal; font-family: monospace; }
158: ul.domTree .t2 .name { color: black; font-weight: bold; }
159: ul.domTree .t2 .value { color: blue; font-weight: normal; }
160: ul.domTree .t3 code, .domTree .t4 code, .domTree .t5 code { color: gray; }
161: ul.domTree .t7 code, .domTree .t8 code { color: green; }
162: ul.domTree .t10 code { color: teal; }
163:
1.14 mike 164: body.dfnEnabled dfn { cursor: pointer; }
165: .dfnPanel {
166: display: inline;
167: position: absolute;
168: z-index: 10;
169: height: auto;
170: width: auto;
171: padding: 0.5em 0.75em;
172: font: small sans-serif, Droid Sans Fallback;
173: background: #DDDDDD;
174: color: black;
175: border: outset 0.2em;
176: }
177: .dfnPanel * { margin: 0; padding: 0; font: inherit; text-indent: 0; }
178: .dfnPanel :link, .dfnPanel :visited { color: black; }
179: .dfnPanel p { font-weight: bolder; }
180: .dfnPanel * + p { margin-top: 0.25em; }
181: .dfnPanel li { list-style-position: inside; }
182:
1.1 mike 183: #configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
184: #configUI p { margin: 0.5em 0; padding: 0.3em; background: #EEEEEE; color: black; border: inset thin; }
185: #configUI p label { display: block; }
186: #configUI #updateUI, #configUI .loginUI { text-align: center; }
187: #configUI input[type=button] { display: block; margin: auto; }
1.121 mike 188:
1.321 mike 189: fieldset { margin: 1em; padding: 0.5em 1em; }
190: fieldset > legend + * { margin-top: 0; }
1.293 mike 191: fieldset > :last-child { margin-bottom: 0; }
1.321 mike 192: fieldset p { margin: 0.5em 0; }
193:
1.399 mike 194: </style><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><link href="style.css" rel="stylesheet"><script src="link-fixup.js"></script><style type="text/css">
1.1 mike 195:
196: .applies thead th > * { display: block; }
197: .applies thead code { display: block; }
198: .applies tbody th { whitespace: nowrap; }
199: .applies td { text-align: center; }
200: .applies .yes { background: yellow; }
201:
1.136 mike 202: .matrix, .matrix td { border: hidden; text-align: right; }
1.1 mike 203: .matrix { margin-left: 2em; }
204:
205: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
206: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
207: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
208:
1.213 mike 209: td.eg { border-width: thin; text-align: center; }
210:
1.1 mike 211: #table-example-1 { border: solid thin; border-collapse: collapse; margin-left: 3em; }
212: #table-example-1 * { font-family: "Essays1743", serif; line-height: 1.01em; }
213: #table-example-1 caption { padding-bottom: 0.5em; }
214: #table-example-1 thead, #table-example-1 tbody { border: none; }
215: #table-example-1 th, #table-example-1 td { border: solid thin; }
216: #table-example-1 th { font-weight: normal; }
217: #table-example-1 td { border-style: none solid; vertical-align: top; }
218: #table-example-1 th { padding: 0.5em; vertical-align: middle; text-align: center; }
219: #table-example-1 tbody tr:first-child td { padding-top: 0.5em; }
220: #table-example-1 tbody tr:last-child td { padding-bottom: 1.5em; }
221: #table-example-1 tbody td:first-child { padding-left: 2.5em; padding-right: 0; width: 9em; }
222: #table-example-1 tbody td:first-child::after { content: leader(". "); }
223: #table-example-1 tbody td { padding-left: 2em; padding-right: 2em; }
224: #table-example-1 tbody td:first-child + td { width: 10em; }
225: #table-example-1 tbody td:first-child + td ~ td { width: 2.5em; }
226: #table-example-1 tbody td:first-child + td + td + td ~ td { width: 1.25em; }
227:
228: .apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
229: .apple-table-examples * { font-family: "Times", serif; }
230: .apple-table-examples td, .apple-table-examples th { border: none; white-space: nowrap; padding-top: 0; padding-bottom: 0; }
231: .apple-table-examples tbody th:first-child { border-left: none; width: 100%; }
232: .apple-table-examples thead th:first-child ~ th { font-size: smaller; font-weight: bolder; border-bottom: solid 2px; text-align: center; }
233: .apple-table-examples tbody th::after, .apple-table-examples tfoot th::after { content: leader(". ") }
234: .apple-table-examples tbody th, .apple-table-examples tfoot th { font: inherit; text-align: left; }
235: .apple-table-examples td { text-align: right; vertical-align: top; }
236: .apple-table-examples.e1 tbody tr:last-child td { border-bottom: solid 1px; }
1.9 mike 237: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
238: .apple-table-examples.e2 th[scope=row] { padding-left: 1em; }
239: .apple-table-examples sup { line-height: 0; }
240:
1.11 mike 241: .details-example img { vertical-align: top; }
242:
1.386 mike 243: #base64-table {
244: white-space: nowrap;
245: font-size: 0.6em;
246: column-width: 6em;
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250: -moz-column-count: 5;
251: -moz-column-gap: 1em;
252: -webkit-column-width: 6em;
253: -webkit-column-count: 5;
254: -webkit-column-gap: 1em;
255: }
256: #base64-table thead { display: none; }
257: #base64-table * { border: none; }
258: #base64-table tbody td:first-child:after { content: ':'; }
259: #base64-table tbody td:last-child { text-align: right; }
260:
1.26 mike 261: #named-character-references-table {
1.257 mike 262: white-space: nowrap;
1.26 mike 263: font-size: 0.6em;
1.257 mike 264: column-width: 30em;
1.26 mike 265: column-gap: 1em;
1.257 mike 266: -moz-column-width: 30em;
1.26 mike 267: -moz-column-gap: 1em;
1.257 mike 268: -webkit-column-width: 30em;
1.26 mike 269: -webkit-column-gap: 1em;
270: }
1.257 mike 271: #named-character-references-table > table > tbody > tr > td:first-child + td,
1.26 mike 272: #named-character-references-table > table > tbody > tr > td:last-child { text-align: center; }
273: #named-character-references-table > table > tbody > tr > td:last-child:hover > span { position: absolute; top: auto; left: auto; margin-left: 0.5em; line-height: 1.2; font-size: 5em; border: outset; padding: 0.25em 0.5em; background: white; width: 1.25em; height: auto; text-align: center; }
1.257 mike 274: #named-character-references-table > table > tbody > tr#entity-CounterClockwiseContourIntegral > td:first-child { font-size: 0.5em; }
1.26 mike 275:
1.35 mike 276: .glyph.control { color: red; }
277:
1.38 mike 278: @font-face {
279: font-family: 'Essays1743';
280: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743.ttf');
281: }
282: @font-face {
283: font-family: 'Essays1743';
284: font-weight: bold;
285: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-Bold.ttf');
286: }
287: @font-face {
288: font-family: 'Essays1743';
289: font-style: italic;
290: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-Italic.ttf');
291: }
292: @font-face {
293: font-family: 'Essays1743';
294: font-style: italic;
295: font-weight: bold;
296: src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-BoldItalic.ttf');
297: }
298:
1.399 mike 299: </style><link href="data:text/css," id="complete" rel="stylesheet" title="Complete specification"><link href="data:text/css,.impl%20%7B%20display:%20none;%20%7D%0Ahtml%20%7B%20border:%20solid%20yellow;%20%7D%20.domintro:before%20%7B%20display:%20none;%20%7D" id="author" rel="alternate stylesheet" title="Author documentation only"><link href="data:text/css,.impl%20%7B%20background:%20%23FFEEEE;%20%7D%20.domintro:before%20%7B%20background:%20%23FFEEEE;%20%7D" id="highlight" rel="alternate stylesheet" title="Highlight implementation requirements"><script type="text/javascript">
300: function getCookie(name) {
301: var params = location.search.substr(1).split("&");
302: for (var index = 0; index < params.length; index++) {
303: if (params[index] == name)
304: return "1";
305: var data = params[index].split("=");
306: if (data[0] == name)
307: return unescape(data[1]);
308: }
309: var cookies = document.cookie.split("; ");
310: for (var index = 0; index < cookies.length; index++) {
311: var data = cookies[index].split("=");
312: if (data[0] == name)
313: return unescape(data[1]);
314: }
315: return null;
316: }
317: function load(script) {
318: var e = document.createElement('script');
319: e.setAttribute('src', script + '?' + encodeURIComponent(location) + '&' + encodeURIComponent(document.referrer));
320: document.body.appendChild(e);
321: }
322: function init() {
323: if (location.search == '?slow-browser')
324: return;
325: var configUI = document.createElement('div');
326: configUI.id = 'configUI';
327: document.body.appendChild(configUI);
328: if (document.getElementById('head'))
329: load('toc.js');
330: load('dfn.js');
331: if (getCookie('profile') == '1')
332: document.getElementsByTagName('h2')[0].textContent += '; load: ' + (new Date() - loadTimer) + 'ms';
333: fixBrokenLink();
334: }
335: </script><link href="common-input-element-attributes.html" rel="prev" title="4.10.7.2 Common input element attributes">
1.160 mike 336: <link href="Overview.html#contents" rel="index" title="Table of contents">
337: <link href="association-of-controls-and-forms.html" rel="next" title="4.10.18 Association of controls and forms">
1.399 mike 338: <body onload="fixBrokenLink(); init()"><div class="head" id="head">
1.9 mike 339: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
1.36 mike 340:
1.407 ! mike 341: <h1>HTML5 <span class="edition">Edition for Web Authors</span> <span class="rcsrevision">revision 1.4815</span></h1>
1.9 mike 342: </div><div>
1.320 mike 343: <a href="common-input-element-attributes.html">← 4.10.7.2 Common input element attributes</a> –
1.160 mike 344: <a href="Overview.html#contents">Table of contents</a> –
1.320 mike 345: <a href="association-of-controls-and-forms.html">4.10.18 Association of controls and forms →</a>
1.160 mike 346: <ol class="toc"><li><ol><li><ol><li><a href="the-button-element.html#the-button-element" id="x4.10.8-the-button-element"><span class="secno">4.10.8 </span>The <code>button</code> element</a><li><a href="the-button-element.html#the-select-element" id="x4.10.9-the-select-element"><span class="secno">4.10.9 </span>The <code>select</code> element</a><li><a href="the-button-element.html#the-datalist-element" id="x4.10.10-the-datalist-element"><span class="secno">4.10.10 </span>The <code>datalist</code> element</a><li><a href="the-button-element.html#the-optgroup-element" id="x4.10.11-the-optgroup-element"><span class="secno">4.10.11 </span>The <code>optgroup</code> element</a><li><a href="the-button-element.html#the-option-element" id="x4.10.12-the-option-element"><span class="secno">4.10.12 </span>The <code>option</code> element</a><li><a href="the-button-element.html#the-textarea-element" id="x4.10.13-the-textarea-element"><span class="secno">4.10.13 </span>The <code>textarea</code> element</a><li><a href="the-button-element.html#the-keygen-element" id="x4.10.14-the-keygen-element"><span class="secno">4.10.14 </span>The <code>keygen</code> element</a><li><a href="the-button-element.html#the-output-element" id="x4.10.15-the-output-element"><span class="secno">4.10.15 </span>The <code>output</code> element</a><li><a href="the-button-element.html#the-progress-element" id="x4.10.16-the-progress-element"><span class="secno">4.10.16 </span>The <code>progress</code> element</a><li><a href="the-button-element.html#the-meter-element" id="x4.10.17-the-meter-element"><span class="secno">4.10.17 </span>The <code>meter</code> element</a></ol></ol></ol></div>
1.156 mike 347:
1.202 mike 348: <h4 id="the-button-element"><span class="secno">4.10.8 </span>The <dfn><code>button</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 349: <dd><a href="content-models.html#flow-content" id="flow-content-125">Flow content</a>.</dd>
1.363 mike 350: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-136">Phrasing content</a>.</dd>
1.156 mike 351: <dd><a href="content-models.html#interactive-content" id="interactive-content-14">Interactive content</a>.</dd>
1.202 mike 352: <dd><a href="forms.html#category-listed" id="category-listed-5" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-3" title="category-label">labelable</a>, and <a href="forms.html#category-submit" id="category-submit-4" title="category-submit">submittable</a> <a href="forms.html#form-associated-element" id="form-associated-element-9">form-associated element</a>.</dd>
1.203 mike 353: <dt>Contexts in which this element can be used:</dt>
1.363 mike 354: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-137">phrasing content</a> is expected.</dd>
1.9 mike 355: <dt>Content model:</dt>
1.363 mike 356: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-138">Phrasing content</a>, but there must be no <a href="content-models.html#interactive-content" id="interactive-content-15">interactive content</a> descendant.</dd>
1.9 mike 357: <dt>Content attributes:</dt>
1.321 mike 358: <dd><a href="elements.html#global-attributes" id="global-attributes-88">Global attributes</a></dd>
1.156 mike 359: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-1">autofocus</a></code></dd>
1.370 mike 360: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-13">disabled</a></code></dd>
1.262 mike 361: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-49">form</a></code></dd>
1.156 mike 362: <dd><code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction" id="formaction-26">formaction</a></code></dd>
363: <dd><code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype" id="formenctype-26">formenctype</a></code></dd>
364: <dd><code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod" id="formmethod-26">formmethod</a></code></dd>
365: <dd><code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-27">formnovalidate</a></code></dd>
366: <dd><code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget" id="formtarget-26">formtarget</a></code></dd>
367: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-37">name</a></code></dd>
1.213 mike 368: <dd><code title="attr-button-type"><a href="#attr-button-type" id="type-75">type</a></code></dd>
1.255 mike 369: <dd><code title="attr-button-value"><a href="#attr-button-value" id="value-30">value</a></code></dd>
1.9 mike 370: <dt>DOM interface:</dt>
371: <dd>
1.321 mike 372: <pre class="idl">interface <dfn id="htmlbuttonelement">HTMLButtonElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-96">HTMLElement</a> {
1.162 mike 373: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
374: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
375: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-5">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
376: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formaction" title='Read about this "formAction" reference in the full HTML5 spec.'>formAction</a>;
377: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formenctype" title='Read about this "formEnctype" reference in the full HTML5 spec.'>formEnctype</a>;
378: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formmethod" title='Read about this "formMethod" reference in the full HTML5 spec.'>formMethod</a>;
379: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formnovalidate" title='Read about this "formNoValidate" reference in the full HTML5 spec.'>formNoValidate</a>;
380: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formtarget" title='Read about this "formTarget" reference in the full HTML5 spec.'>formTarget</a>;
381: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
382: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-button-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
383: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-button-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
384:
385: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
386: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
387: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
388: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
389: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.9 mike 390:
1.162 mike 391: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 392: };</pre>
393: </dd>
1.162 mike 394: </dl><p>The <code><a href="#the-button-element" id="button-11">button</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a
1.160 mike 395: button. <p>The element is a <a href="forms.html#concept-button" id="concept-button-4" title="concept-button">button</a>.<p>The <dfn id="attr-button-type" title="attr-button-type"><code>type</code></dfn>
1.9 mike 396: attribute controls the behavior of the button when it is activated.
1.304 mike 397: It is an <a href="common-microsyntaxes.html#enumerated-attribute" id="enumerated-attribute-9">enumerated attribute</a>. The following table
1.160 mike 398: lists the keywords and states for the attribute — the keywords
1.9 mike 399: in the left column map to the states in the cell in the second
1.160 mike 400: column on the same row as the keyword.<table><thead><tr><th> Keyword
401: <th> State
402: <th> Brief description
403: <tbody><tr><td><dfn id="attr-button-type-submit" title="attr-button-type-submit"><code>submit</code></dfn>
1.162 mike 404: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.160 mike 405: <td>Submits the form.
406: <tr><td><dfn id="attr-button-type-reset" title="attr-button-type-reset"><code>reset</code></dfn>
1.162 mike 407: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-reset-state" title='Read about this "Reset Button" reference in the full HTML5 spec.'>Reset Button</a>
1.160 mike 408: <td>Resets the form.
409: <tr><td><dfn id="attr-button-type-button" title="attr-button-type-button"><code>button</code></dfn>
1.162 mike 410: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-button-state" title='Read about this "Button" reference in the full HTML5 spec.'>Button</a>
1.160 mike 411: <td>Does nothing.
1.162 mike 412: </table><p>The <i>missing value default</i> is the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.213 mike 413: state.<p>If the <code title="attr-button-type"><a href="#attr-button-type" id="type-76">type</a></code> attribute is in
1.162 mike 414: the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.262 mike 415: state, the element is specifically a <a href="forms.html#concept-submit-button" id="concept-submit-button-2" title="concept-submit-button">submit button</a>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-50">form</a></code> attribute is used to
1.156 mike 416: explicitly associate the <code><a href="#the-button-element" id="button-12">button</a></code> element with its
417: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-8">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-38">name</a></code>
1.370 mike 418: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-14">disabled</a></code> attribute is used to make
1.9 mike 419: the control non-interactive and to prevent its value from being
1.156 mike 420: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-2">autofocus</a></code>
421: attribute controls focus. The <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction" id="formaction-27">formaction</a></code>, <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype" id="formenctype-27">formenctype</a></code>, <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod" id="formmethod-27">formmethod</a></code>, <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-28">formnovalidate</a></code>, and <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget" id="formtarget-27">formtarget</a></code> attributes are
1.160 mike 422: <a href="association-of-controls-and-forms.html#attributes-for-form-submission" id="attributes-for-form-submission-3">attributes for form submission</a>.<p class="note">The <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-29">formnovalidate</a></code> attribute can
1.9 mike 423: be used to make submit buttons that do not trigger the constraint
1.160 mike 424: validation.<p>The <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction" id="formaction-28">formaction</a></code>, <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype" id="formenctype-28">formenctype</a></code>, <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod" id="formmethod-28">formmethod</a></code>, <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-30">formnovalidate</a></code>, and <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget" id="formtarget-28">formtarget</a></code> must not be specified
1.213 mike 425: if the element's <code title="attr-button-type"><a href="#attr-button-type" id="type-77">type</a></code>
1.162 mike 426: attribute is not in the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.160 mike 427: state.<p>The <dfn id="attr-button-value" title="attr-button-value"><code>value</code></dfn>
1.9 mike 428: attribute gives the element's value for the purposes of form
1.162 mike 429: submission. The element's <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#concept-fe-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a> is the value of the element's
1.255 mike 430: <code title="attr-button-value"><a href="#attr-button-value" id="value-31">value</a></code> attribute, if there is
1.160 mike 431: one, or the empty string otherwise.<p class="note">A button (and its value) is only included in the
1.9 mike 432: form submission if the button itself was used to initiate the form
1.160 mike 433: submission.<div class="example">
1.9 mike 434:
435: <p>The following button is labeled "Show hint" and pops up a dialog
436: box when activated:</p>
437:
438: <pre><button type=button
439: onclick="alert('This 15-20 minute piece was composed by George Gershwin.')">
440: Show hint
441: </button></pre>
442:
1.202 mike 443: </div><h4 id="the-select-element"><span class="secno">4.10.9 </span>The <dfn><code>select</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 444: <dd><a href="content-models.html#flow-content" id="flow-content-126">Flow content</a>.</dd>
1.363 mike 445: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-139">Phrasing content</a>.</dd>
1.156 mike 446: <dd><a href="content-models.html#interactive-content" id="interactive-content-16">Interactive content</a>.</dd>
1.202 mike 447: <dd><a href="forms.html#category-listed" id="category-listed-6" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-4" title="category-label">labelable</a>, <a href="forms.html#category-submit" id="category-submit-5" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" id="category-reset-2" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-10">form-associated element</a>.</dd>
1.203 mike 448: <dt>Contexts in which this element can be used:</dt>
1.363 mike 449: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-140">phrasing content</a> is expected.</dd>
1.9 mike 450: <dt>Content model:</dt>
1.191 mike 451: <dd>Zero or more <code><a href="#the-option-element" id="option-9">option</a></code> or <code><a href="#the-optgroup-element" id="optgroup-3">optgroup</a></code> elements.</dd>
1.9 mike 452: <dt>Content attributes:</dt>
1.321 mike 453: <dd><a href="elements.html#global-attributes" id="global-attributes-89">Global attributes</a></dd>
1.156 mike 454: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-3">autofocus</a></code></dd>
1.370 mike 455: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-15">disabled</a></code></dd>
1.262 mike 456: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-51">form</a></code></dd>
1.366 mike 457: <dd><code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-34">multiple</a></code></dd>
1.156 mike 458: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-39">name</a></code></dd>
1.234 mike 459: <dd><code title="attr-select-required"><a href="#attr-select-required" id="required-28">required</a></code></dd>
1.156 mike 460: <dd><code title="attr-select-size"><a href="#attr-select-size" id="size-30">size</a></code></dd>
1.9 mike 461: <dt>DOM interface:</dt>
462: <dd>
1.321 mike 463: <pre class="idl">interface <dfn id="htmlselectelement">HTMLSelectElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-97">HTMLElement</a> {
1.162 mike 464: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
465: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
466: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-6">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
467: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-multiple" title='Read about this "multiple" reference in the full HTML5 spec.'>multiple</a>;
468: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
1.165 mike 469: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-required" title='Read about this "required" reference in the full HTML5 spec.'>required</a>;
1.162 mike 470: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-size" title='Read about this "size" reference in the full HTML5 spec.'>size</a>;
1.160 mike 471:
1.162 mike 472: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
1.160 mike 473:
1.162 mike 474: readonly attribute <a href="urls.html#htmloptionscollection" id="htmloptionscollection-3">HTMLOptionsCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a>;
475: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-length" title='Read about this "length" reference in the full HTML5 spec.'>length</a>;
1.291 mike 476: getter any <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-item" title='Read about this "item" reference in the full HTML5 spec.'>item</a>(in unsigned long index);
477: any <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-nameditem" title='Read about this "namedItem" reference in the full HTML5 spec.'>namedItem</a>(in DOMString name);
1.321 mike 478: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-add" title='Read about this "add" reference in the full HTML5 spec.'>add</a>(in <a href="elements.html#htmlelement" id="htmlelement-98">HTMLElement</a> element, in optional <a href="elements.html#htmlelement" id="htmlelement-99">HTMLElement</a> before);
479: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-add" title='Read about this "add" reference in the full HTML5 spec.'>add</a>(in <a href="elements.html#htmlelement" id="htmlelement-100">HTMLElement</a> element, in long before);
1.162 mike 480: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-remove" title='Read about this "remove" reference in the full HTML5 spec.'>remove</a>(in long index);
481:
1.202 mike 482: readonly attribute <a href="urls.html#htmlcollection" id="htmlcollection-34">HTMLCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedoptions" title='Read about this "selectedOptions" reference in the full HTML5 spec.'>selectedOptions</a>;
1.162 mike 483: attribute long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedindex" title='Read about this "selectedIndex" reference in the full HTML5 spec.'>selectedIndex</a>;
484: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
485:
486: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
487: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
488: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
489: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
490: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.9 mike 491:
1.162 mike 492: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 493: };</pre>
494: </dd>
495: </dl><!-- Proposals for v2:
496: * <select value=""> as an alternative to <option selected>
497: http://developers.slashdot.org/comments.pl?sid=426306&cid=22142072
1.11 mike 498: <Philip`> http://www.ipiao.com.cn/ does <select size="1" name="to"><script type="text/javascript">City_Default="PEK"</script><SCRIPT language=javascript
1.9 mike 499: src="/js/flightcity.js"></SCRIPT></select> which is the kind of thing that could be much simpler with <select value="PEK">
1.234 mike 500: --><p>The <code><a href="#the-select-element" id="select-18">select</a></code> element represents a control for
1.160 mike 501: selecting amongst a set of options.<p>The <dfn id="attr-select-multiple" title="attr-select-multiple"><code>multiple</code></dfn>
1.156 mike 502: attribute is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-13">boolean attribute</a>. If the attribute is
1.234 mike 503: present, then the <code><a href="#the-select-element" id="select-19">select</a></code> element
1.162 mike 504: <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a control for selecting zero or more options
1.156 mike 505: from the <a href="#concept-select-option-list" id="concept-select-option-list-1" title="concept-select-option-list">list of
1.9 mike 506: options</a>. If the attribute is absent, then the
1.234 mike 507: <code><a href="#the-select-element" id="select-20">select</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a control for
1.160 mike 508: selecting a single option from the <a href="#concept-select-option-list" id="concept-select-option-list-2" title="concept-select-option-list">list of options</a>.<p>The <dfn id="attr-select-size" title="attr-select-size"><code>size</code></dfn>
1.156 mike 509: attribute gives the number of options to show to the user. The <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size" id="size-26">size</a></code> attribute, if specified, must
510: have a value that is a <a href="common-microsyntaxes.html#valid-non-negative-integer" id="valid-non-negative-integer-10">valid non-negative integer</a>
1.366 mike 511: greater than zero. If the <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-35">multiple</a></code> attribute is present,
1.156 mike 512: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size" id="size-27">size</a></code> attribute's
1.366 mike 513: default value is 4. If the <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-36">multiple</a></code> attribute is absent,
1.156 mike 514: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size" id="size-28">size</a></code> attribute's
1.160 mike 515: default value is 1.<p>The <dfn id="concept-select-option-list" title="concept-select-option-list">list of options</dfn>
1.234 mike 516: for a <code><a href="#the-select-element" id="select-21">select</a></code> element consists of all the
517: <code><a href="#the-option-element" id="option-10">option</a></code> element children of the <code><a href="#the-select-element" id="select-22">select</a></code>
1.191 mike 518: element, and all the <code><a href="#the-option-element" id="option-11">option</a></code> element children of all the
1.234 mike 519: <code><a href="#the-optgroup-element" id="optgroup-4">optgroup</a></code> element children of the <code><a href="#the-select-element" id="select-23">select</a></code>
1.322 mike 520: element, in <a href="infrastructure.html#tree-order" id="tree-order-7">tree order</a>.<p>The <dfn id="attr-select-required" title="attr-select-required"><code>required</code></dfn>
1.156 mike 521: attribute is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-14">boolean attribute</a>. When specified, the
1.138 mike 522: user will be required to select a value before submitting the
1.234 mike 523: form.<p>If a <code><a href="#the-select-element" id="select-24">select</a></code> element has a <code title="attr-select-required"><a href="#attr-select-required" id="required-29">required</a></code> attribute specified,
1.366 mike 524: does not have a <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-37">multiple</a></code>
1.162 mike 525: attribute specified, and has a <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-select-size" title='Read about this "display size" reference in the full HTML5 spec.'>display size</a> of 1; and if the
1.156 mike 526: <a href="#concept-option-value" id="concept-option-value-0" title="concept-option-value">value</a> of the first
1.234 mike 527: <code><a href="#the-option-element" id="option-12">option</a></code> element in the <code><a href="#the-select-element" id="select-25">select</a></code> element's
1.156 mike 528: <a href="#concept-select-option-list" id="concept-select-option-list-3" title="concept-select-option-list">list of options</a> (if
1.191 mike 529: any) is the empty string, and that <code><a href="#the-option-element" id="option-13">option</a></code> is not <a href="#concept-option-disabled" id="concept-option-disabled-0" title="concept-option-disabled">disabled</a>, and, finally, that
1.234 mike 530: <code><a href="#the-option-element" id="option-14">option</a></code> element's parent node is the <code><a href="#the-select-element" id="select-26">select</a></code>
1.190 mike 531: element (and not an <code><a href="#the-optgroup-element" id="optgroup-5">optgroup</a></code> element), then that
1.234 mike 532: <code><a href="#the-option-element" id="option-15">option</a></code> is the <code><a href="#the-select-element" id="select-27">select</a></code> element's
1.262 mike 533: <dfn id="placeholder-label-option">placeholder label option</dfn>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-52">form</a></code> attribute is used to
1.234 mike 534: explicitly associate the <code><a href="#the-select-element" id="select-28">select</a></code> element with its
1.156 mike 535: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-9">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-40">name</a></code>
1.370 mike 536: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-16">disabled</a></code> attribute is used to make
1.9 mike 537: the control non-interactive and to prevent its value from being
1.156 mike 538: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-4">autofocus</a></code>
1.162 mike 539: attribute controls focus.<dl class="domintro"><dt><var title="">select</var> . <code title="dom-select-type"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a></code></dt>
1.9 mike 540:
541: <dd>
542:
543: <p>Returns "<code title="">select-multiple</code>" if the element
1.366 mike 544: has a <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-38">multiple</a></code>
1.9 mike 545: attribute, and "<code title="">select-one</code>"
546: otherwise.</p>
547:
548: </dd>
549:
1.162 mike 550: <dt><var title="">select</var> . <code title="dom-select-options"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a></code></dt>
1.9 mike 551:
552: <dd>
553:
1.156 mike 554: <p>Returns an <code><a href="urls.html#htmloptionscollection" id="htmloptionscollection-4">HTMLOptionsCollection</a></code> of the <a href="#concept-select-option-list" id="concept-select-option-list-4" title="concept-select-option-list">list of options</a>.</p>
1.9 mike 555:
556: </dd>
557:
1.162 mike 558: <dt><var title="">select</var> . <code title="dom-select-length"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-length" title='Read about this "length" reference in the full HTML5 spec.'>length</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 559: <dd>
1.156 mike 560: <p>Returns the number of elements in the <a href="#concept-select-option-list" id="concept-select-option-list-5" title="concept-select-option-list">list of options</a>.</p>
1.234 mike 561: <p>When set to a smaller number, truncates the number of <code><a href="#the-option-element" id="option-16">option</a></code> elements in the <code><a href="#the-select-element" id="select-29">select</a></code>.</p>
562: <p>When set to a greater number, adds new blank <code><a href="#the-option-element" id="option-17">option</a></code> elements to the <code><a href="#the-select-element" id="select-30">select</a></code>.</p>
1.9 mike 563: </dd>
564:
1.162 mike 565: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-item" title='Read about this "item" reference in the full HTML5 spec.'>item</a></code>(<var title="">index</var>)</dt>
1.9 mike 566: <dt><var title="">select</var>[<var title="">index</var>]</dt>
567: <dd>
1.322 mike 568: <p>Returns the item with index <var title="">index</var> from the <a href="#concept-select-option-list" id="concept-select-option-list-6" title="concept-select-option-list">list of options</a>. The items are sorted in <a href="infrastructure.html#tree-order" id="tree-order-8">tree order</a>.</p>
1.9 mike 569: <p>Returns null if <var title="">index</var> is out of range.</p>
570: </dd>
571:
1.162 mike 572: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-item" title='Read about this "namedItem" reference in the full HTML5 spec.'>namedItem</a></code>(<var title="">name</var>)</dt>
1.9 mike 573: <dd>
1.201 mike 574: <p>Returns the item with <a href="elements.html#concept-id" id="concept-id-17" title="concept-id">ID</a> or <code title="attr-option-name"><a href="obsolete.html#attr-option-name" id="name-59">name</a></code> <var title="">name</var> from the <a href="#concept-select-option-list" id="concept-select-option-list-7" title="concept-select-option-list">list of options</a>.</p>
1.162 mike 575: <p>If there are multiple matching items, then a <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a></code> object containing all those elements is returned.</p>
1.201 mike 576: <p>Returns null if no element with that <a href="elements.html#concept-id" id="concept-id-18" title="concept-id">ID</a> could be found.</p>
1.9 mike 577: </dd>
578:
1.162 mike 579: <dt><var title="">select</var> . <code title="dom-select-add"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-add" title='Read about this "add" reference in the full HTML5 spec.'>add</a></code>(<var title="">element</var> [, <var title="">before</var> ])</dt>
1.9 mike 580: <dd>
581: <p>Inserts <var title="">element</var> before the node given by <var title="">before</var>.</p>
582: <p>The <var title="">before</var> argument can be a number, in
583: which case <var title="">element</var> is inserted before the item
1.156 mike 584: with that number, or an element from the <a href="#concept-select-option-list" id="concept-select-option-list-8" title="concept-select-option-list">list of options</a>, in
1.9 mike 585: which case <var title="">element</var> is inserted before that
586: element.</p>
587: <p>If <var title="">before</var> is omitted, null, or a number out
588: of range, then <var title="">element</var> will be added at the
589: end of the list.</p>
1.156 mike 590: <p>This method will throw a <code><a href="urls.html#hierarchy_request_err" id="hierarchy_request_err-5">HIERARCHY_REQUEST_ERR</a></code>
1.9 mike 591: exception if <var title="">element</var> is an ancestor of the
1.191 mike 592: element into which it is to be inserted. If <var title="">element</var> is not an <code><a href="#the-option-element" id="option-18">option</a></code> or
1.190 mike 593: <code><a href="#the-optgroup-element" id="optgroup-6">optgroup</a></code> element, then the method does nothing.</p>
1.9 mike 594: </dd>
595:
1.162 mike 596: <dt><var title="">select</var> . <code title="dom-select-selectedOptions"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedoptions" title='Read about this "selectedOptions" reference in the full HTML5 spec.'>selectedOptions</a></code></dt>
1.9 mike 597:
598: <dd>
599:
1.202 mike 600: <p>Returns an <code><a href="urls.html#htmlcollection" id="htmlcollection-35">HTMLCollection</a></code> of the <a href="#concept-select-option-list" id="concept-select-option-list-9" title="concept-select-option-list">list of options</a> that are
1.9 mike 601: selected.</p>
602:
603: </dd>
604:
1.162 mike 605: <dt><var title="">select</var> . <code title="dom-select-selectedIndex"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedindex" title='Read about this "selectedIndex" reference in the full HTML5 spec.'>selectedIndex</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 606:
607: <dd>
608:
609: <p>Returns the index of the first selected item, if any, or
1.160 mike 610: −1 if there is no selected item.</p>
1.9 mike 611:
612: <p>Can be set, to change the selection.</p>
613:
614: </dd>
615:
1.162 mike 616: <dt><var title="">select</var> . <code title="dom-select-value"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 617:
618: <dd>
619:
1.162 mike 620: <p>Returns the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#concept-fe-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a> of the
1.9 mike 621: first selected item, if any, or the empty string if there is no
622: selected item.</p>
623:
624: <p>Can be set, to change the selection.</p>
625:
626: </dd>
627:
628: </dl><div class="example">
629:
1.234 mike 630: <p>The following example shows how a <code><a href="#the-select-element" id="select-31">select</a></code> element
1.9 mike 631: can be used to offer the user with a set of options from which the
632: user can select a single option. The default option is
633: preselected.</p>
634:
635: <pre><p>
636: <label for="unittype">Select unit type:</label>
637: <select id="unittype" name="unittype">
638: <option value="1"> Miner </option>
639: <option value="2"> Puffer </option>
640: <option value="3" selected> Snipey </option>
641: <option value="4"> Max </option>
642: <option value="5"> Firebot </option>
643: </select>
644: </p></pre>
645:
646: </div><div class="example">
647:
648: <p>Here, the user is offered a set of options from which he can
649: select any number. By default, all five options are selected.</p>
650:
651: <pre><p>
652: <label for="allowedunits">Select unit types to enable on this map:</label>
653: <select id="allowedunits" name="allowedunits" multiple>
654: <option value="1" selected> Miner </option>
655: <option value="2" selected> Puffer </option>
656: <option value="3" selected> Snipey </option>
657: <option value="4" selected> Max </option>
658: <option value="5" selected> Firebot </option>
659: </select>
660: </p></pre>
661:
1.202 mike 662: </div><h4 id="the-datalist-element"><span class="secno">4.10.10 </span>The <dfn><code>datalist</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 663: <dd><a href="content-models.html#flow-content" id="flow-content-127">Flow content</a>.</dd>
1.363 mike 664: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-141">Phrasing content</a>.</dd>
1.203 mike 665: <dt>Contexts in which this element can be used:</dt>
1.363 mike 666: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-142">phrasing content</a> is expected.</dd>
1.9 mike 667: <dt>Content model:</dt>
1.363 mike 668: <dd>Either: <a href="content-models.html#phrasing-content" id="phrasing-content-143">phrasing content</a>.</dd>
1.191 mike 669: <dd>Or: Zero or more <code><a href="#the-option-element" id="option-19">option</a></code> elements.</dd>
1.9 mike 670: <dt>Content attributes:</dt>
1.321 mike 671: <dd><a href="elements.html#global-attributes" id="global-attributes-90">Global attributes</a></dd>
1.9 mike 672: <dt>DOM interface:</dt>
673: <dd>
1.321 mike 674: <pre class="idl">interface <dfn id="htmldatalistelement">HTMLDataListElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-101">HTMLElement</a> {
1.202 mike 675: readonly attribute <a href="urls.html#htmlcollection" id="htmlcollection-36">HTMLCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-datalist-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a>;
1.9 mike 676: };</pre>
677: </dd>
1.156 mike 678: </dl><p>The <code><a href="#the-datalist-element" id="datalist-13">datalist</a></code> element represents a set of
1.191 mike 679: <code><a href="#the-option-element" id="option-20">option</a></code> elements that represent predefined options for
1.9 mike 680: other controls. The contents of the element represents fallback
1.191 mike 681: content for legacy user agents, intermixed with <code><a href="#the-option-element" id="option-21">option</a></code>
1.9 mike 682: elements that represent the predefined options. In the rendering,
1.162 mike 683: the <code><a href="#the-datalist-element" id="datalist-14">datalist</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a>
1.160 mike 684: nothing.<p>The <code><a href="#the-datalist-element" id="datalist-15">datalist</a></code> element is hooked up to an
1.387 mike 685: <code><a href="the-input-element.html#the-input-element" id="input-121">input</a></code> element using the <code title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list" id="list-29">list</a></code> attribute on the
686: <code><a href="the-input-element.html#the-input-element" id="input-122">input</a></code> element.<p>Each <code><a href="#the-option-element" id="option-22">option</a></code> element that is a descendant of the
1.156 mike 687: <code><a href="#the-datalist-element" id="datalist-16">datalist</a></code> element, that is not <a href="#concept-option-disabled" id="concept-option-disabled-1" title="concept-option-disabled">disabled</a>, and whose <a href="#concept-option-value" id="concept-option-value-1" title="concept-option-value">value</a> is a string that isn't the
688: empty string, represents a suggestion. Each suggestion has a <a href="#concept-option-value" id="concept-option-value-2" title="concept-option-value">value</a> and a <a href="#concept-option-label" id="concept-option-label-0" title="concept-option-label">label</a>.
1.9 mike 689:
1.162 mike 690: <dl class="domintro"><dt><var title="">datalist</var> . <code title="dom-datalist-options"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-datalist-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a></code></dt>
1.9 mike 691:
692: <dd>
1.202 mike 693: <p>Returns an <code><a href="urls.html#htmlcollection" id="htmlcollection-37">HTMLCollection</a></code> of the <code>options</code> elements of the table.</p>
1.9 mike 694: </dd>
695:
1.202 mike 696: </dl><h4 id="the-optgroup-element"><span class="secno">4.10.11 </span>The <dfn><code>optgroup</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.9 mike 697: <dd>None.</dd>
1.203 mike 698: <dt>Contexts in which this element can be used:</dt>
1.234 mike 699: <dd>As a child of a <code><a href="#the-select-element" id="select-32">select</a></code> element.</dd>
1.9 mike 700: <dt>Content model:</dt>
1.191 mike 701: <dd>Zero or more <code><a href="#the-option-element" id="option-23">option</a></code> elements.</dd>
1.9 mike 702: <dt>Content attributes:</dt>
1.321 mike 703: <dd><a href="elements.html#global-attributes" id="global-attributes-91">Global attributes</a></dd>
1.156 mike 704: <dd><code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled" id="disabled-3">disabled</a></code></dd>
1.304 mike 705: <dd><code title="attr-optgroup-label"><a href="#attr-optgroup-label" id="label-31">label</a></code></dd>
1.9 mike 706: <dt>DOM interface:</dt>
707: <dd>
1.321 mike 708: <pre class="idl">interface <dfn id="htmloptgroupelement">HTMLOptGroupElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-102">HTMLElement</a> {
1.162 mike 709: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-optgroup-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
710: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-optgroup-label" title='Read about this "label" reference in the full HTML5 spec.'>label</a>;
1.9 mike 711: };</pre>
712: </dd>
1.190 mike 713: </dl><!-- v2: make optgroups selectable if they have a value. --><p>The <code><a href="#the-optgroup-element" id="optgroup-7">optgroup</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a group of
1.191 mike 714: <code><a href="#the-option-element" id="option-24">option</a></code> elements with a common label.<p>The element's group of <code><a href="#the-option-element" id="option-25">option</a></code> elements consists of
715: the <code><a href="#the-option-element" id="option-26">option</a></code> elements that are children of the
1.190 mike 716: <code><a href="#the-optgroup-element" id="optgroup-8">optgroup</a></code> element.<p>The <dfn id="attr-optgroup-disabled" title="attr-optgroup-disabled"><code>disabled</code></dfn> attribute
1.156 mike 717: is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-15">boolean attribute</a> and can be used to <a href="#concept-option-disabled" id="concept-option-disabled-2" title="concept-option-disabled">disable</a> a group of
1.191 mike 718: <code><a href="#the-option-element" id="option-27">option</a></code> elements together.<p>The <dfn id="attr-optgroup-label" title="attr-optgroup-label"><code>label</code></dfn>
1.9 mike 719: attribute must be specified. Its value gives the name of the group,
1.160 mike 720: for the purposes of the user interface. <div class="example">
1.9 mike 721:
722: <p>The following snippet shows how a set of lessons from three
1.234 mike 723: courses could be offered in a <code><a href="#the-select-element" id="select-33">select</a></code> drop-down
1.9 mike 724: widget:</p>
725:
726: <pre><form action="courseselector.dll" method="get">
727: <p>Which course would you like to watch today?
728: <p><label>Course:
729: <select name="c">
730: <optgroup label="8.01 Physics I: Classical Mechanics">
731: <option value="8.01.1">Lecture 01: Powers of Ten
732: <option value="8.01.2">Lecture 02: 1D Kinematics
733: <option value="8.01.3">Lecture 03: Vectors
734: <optgroup label="8.02 Electricity and Magnestism">
735: <option value="8.02.1">Lecture 01: What holds our world together?
736: <option value="8.02.2">Lecture 02: Electric Field
737: <option value="8.02.3">Lecture 03: Electric Flux
738: <optgroup label="8.03 Physics III: Vibrations and Waves">
739: <option value="8.03.1">Lecture 01: Periodic Phenomenon
740: <option value="8.03.2">Lecture 02: Beats
741: <option value="8.03.3">Lecture 03: Forced Oscillations with Damping
742: </select>
743: </label>
1.320 mike 744: <p><input type=submit value="▶ Play">
1.9 mike 745: </form></pre>
746:
1.202 mike 747: </div><h4 id="the-option-element"><span class="secno">4.10.12 </span>The <dfn><code>option</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.9 mike 748: <dd>None.</dd>
1.203 mike 749: <dt>Contexts in which this element can be used:</dt>
1.234 mike 750: <dd>As a child of a <code><a href="#the-select-element" id="select-34">select</a></code> element.</dd>
1.156 mike 751: <dd>As a child of a <code><a href="#the-datalist-element" id="datalist-17">datalist</a></code> element.</dd>
1.190 mike 752: <dd>As a child of an <code><a href="#the-optgroup-element" id="optgroup-9">optgroup</a></code> element.</dd>
1.9 mike 753: <dt>Content model:</dt>
1.366 mike 754: <dd><a href="content-models.html#text-content" id="text-content-5" title="text content">Text</a>.</dd>
1.9 mike 755: <dt>Content attributes:</dt>
1.321 mike 756: <dd><a href="elements.html#global-attributes" id="global-attributes-92">Global attributes</a></dd>
1.156 mike 757: <dd><code title="attr-option-disabled"><a href="#attr-option-disabled" id="disabled-6">disabled</a></code></dd>
1.304 mike 758: <dd><code title="attr-option-label"><a href="#attr-option-label" id="label-33">label</a></code></dd>
1.156 mike 759: <dd><code title="attr-option-selected"><a href="#attr-option-selected" id="selected-0">selected</a></code></dd>
1.255 mike 760: <dd><code title="attr-option-value"><a href="#attr-option-value" id="value-34">value</a></code></dd>
1.9 mike 761: <dt>DOM interface:</dt>
762: <dd>
1.162 mike 763: <pre class="idl">[NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(),
764: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-t" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text),
765: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-tv" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text, in DOMString value),
766: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-tvd" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected),
767: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-tvds" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected, in boolean selected)]
1.321 mike 768: interface <dfn id="htmloptionelement">HTMLOptionElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-103">HTMLElement</a> {
1.162 mike 769: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
770: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-7">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
771: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-label" title='Read about this "label" reference in the full HTML5 spec.'>label</a>;
772: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-defaultselected" title='Read about this "defaultSelected" reference in the full HTML5 spec.'>defaultSelected</a>;
773: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-selected" title='Read about this "selected" reference in the full HTML5 spec.'>selected</a>;
774: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1.9 mike 775:
1.162 mike 776: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-text" title='Read about this "text" reference in the full HTML5 spec.'>text</a>;
777: readonly attribute long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-index" title='Read about this "index" reference in the full HTML5 spec.'>index</a>;
1.9 mike 778: };</pre>
779: </dd>
1.191 mike 780: </dl><p>The <code><a href="#the-option-element" id="option-28">option</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> an option
1.234 mike 781: in a <code><a href="#the-select-element" id="select-35">select</a></code> element or as part of a list of suggestions
1.160 mike 782: in a <code><a href="#the-datalist-element" id="datalist-18">datalist</a></code> element.<p>In certain circumstances described in the definition of the
1.234 mike 783: <code><a href="#the-select-element" id="select-36">select</a></code> element, an <code><a href="#the-option-element" id="option-29">option</a></code> element can be a
784: <code><a href="#the-select-element" id="select-37">select</a></code> element's <a href="#placeholder-label-option" id="placeholder-label-option-0">placeholder label option</a>.
1.156 mike 785: A <a href="#placeholder-label-option" id="placeholder-label-option-1">placeholder label option</a> does not represent an actual
1.234 mike 786: option, but instead represents a label for the <code><a href="#the-select-element" id="select-38">select</a></code>
1.160 mike 787: control.<p>The <dfn id="attr-option-disabled" title="attr-option-disabled"><code>disabled</code></dfn>
1.156 mike 788: attribute is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-16">boolean attribute</a>. An
1.191 mike 789: <code><a href="#the-option-element" id="option-30">option</a></code> element is <dfn id="concept-option-disabled" title="concept-option-disabled">disabled</dfn> if its <code title="attr-option-disabled"><a href="#attr-option-disabled" id="disabled-7">disabled</a></code> attribute is present or
1.190 mike 790: if it is a child of an <code><a href="#the-optgroup-element" id="optgroup-10">optgroup</a></code> element whose <code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled" id="disabled-4">disabled</a></code> attribute is
1.160 mike 791: present.<p>The <dfn id="attr-option-label" title="attr-option-label"><code>label</code></dfn>
1.191 mike 792: attribute provides a label for element. The <dfn id="concept-option-label" title="concept-option-label">label</dfn> of an <code><a href="#the-option-element" id="option-31">option</a></code>
1.304 mike 793: element is the value of the <code title="attr-option-label"><a href="#attr-option-label" id="label-34">label</a></code> attribute, if there is one,
1.162 mike 794: or the <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> of the element, if there isn't.<p>The <dfn id="attr-option-value" title="attr-option-value"><code>value</code></dfn>
1.191 mike 795: attribute provides a value for element. The <dfn id="concept-option-value" title="concept-option-value">value</dfn> of an <code><a href="#the-option-element" id="option-32">option</a></code>
1.255 mike 796: element is the value of the <code title="attr-option-value"><a href="#attr-option-value" id="value-35">value</a></code> attribute, if there is one,
1.162 mike 797: or the <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> of the element, if there isn't.<p>The <dfn id="attr-option-selected" title="attr-option-selected"><code>selected</code></dfn>
1.298 mike 798: attribute is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-17">boolean attribute</a>. It represents the
799: default <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-option-selectedness" title='Read about this "selectedness" reference in the full HTML5 spec.'>selectedness</a> of the
1.366 mike 800: element.<p>A <code><a href="#the-select-element" id="select-39">select</a></code> element whose <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-39">multiple</a></code> attribute is not
1.191 mike 801: specified must not have more than one descendant <code><a href="#the-option-element" id="option-33">option</a></code>
1.156 mike 802: element with its <code title="attr-option-selected"><a href="#attr-option-selected" id="selected-1">selected</a></code>
1.162 mike 803: attribute set.<dl class="domintro"><dt><var title="">option</var> . <code title="dom-option-selected"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-selected" title='Read about this "selected" reference in the full HTML5 spec.'>selected</a></code></dt>
1.9 mike 804:
805: <dd>
806:
807: <p>Returns true if the element is selected, and false otherwise.</p>
808:
1.202 mike 809: <p>Can be set, to override the current state of the element.</p>
810:
1.9 mike 811: </dd>
812:
1.162 mike 813: <dt><var title="">option</var> . <code title="dom-option-index"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-index" title='Read about this "index" reference in the full HTML5 spec.'>index</a></code></dt>
1.9 mike 814:
815: <dd>
816:
1.234 mike 817: <p>Returns the index of the element in its <code><a href="#the-select-element" id="select-40">select</a></code>
1.162 mike 818: element's <code title="dom-select-options"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a></code>
1.9 mike 819: list.</p>
820:
821: </dd>
822:
1.162 mike 823: <dt><var title="">option</var> . <code title="dom-option-form"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a></code></dt>
1.9 mike 824:
825: <dd>
826:
1.262 mike 827: <p>Returns the element's <code><a href="forms.html#the-form-element" id="form-22">form</a></code> element, if any, or
1.9 mike 828: null otherwise.</p>
829:
830: </dd>
831:
1.162 mike 832: <dt><var title="">option</var> . <code title="dom-option-text"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-text" title='Read about this "text" reference in the full HTML5 spec.'>text</a></code></dt>
1.11 mike 833:
834: <dd>
835:
1.206 mike 836: <p>Same as <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code>, except that spaces are collapsed.</p>
1.11 mike 837:
838: </dd>
839:
1.162 mike 840: <dt><var title="">option</var> = new <code title="dom-option"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a></code>( [ <var title="">text</var> [, <var title="">value</var> [, <var title="">defaultSelected</var> [, <var title="">selected</var> ] ] ] ] )</dt>
1.9 mike 841:
842: <dd>
843:
1.191 mike 844: <p>Returns a new <code><a href="#the-option-element" id="option-34">option</a></code> element.</p>
1.9 mike 845:
846: <p>The <var title="">text</var> argument sets the contents of the element.</p>
1.255 mike 847: <p>The <var title="">value</var> argument sets the <code title="attr-option-value"><a href="#attr-option-value" id="value-36">value</a></code> attribute.</p>
1.156 mike 848: <p>The <var title="">defaultSelected</var> argument sets the <code title="attr-option-selected"><a href="#attr-option-selected" id="selected-2">selected</a></code> attribute.</p>
1.9 mike 849: <p>The <var title="">selected</var> argument sets whether or not the element is selected. If it is omitted, even if the <var title="">defaultSelected</var> argument is true, the element is not selected.</p>
850:
851: </dd>
852:
1.202 mike 853: </dl><h4 id="the-textarea-element"><span class="secno">4.10.13 </span>The <dfn><code>textarea</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 854: <dd><a href="content-models.html#flow-content" id="flow-content-128">Flow content</a>.</dd>
1.363 mike 855: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-144">Phrasing content</a>.</dd>
1.156 mike 856: <dd><a href="content-models.html#interactive-content" id="interactive-content-17">Interactive content</a>.</dd>
1.202 mike 857: <dd><a href="forms.html#category-listed" id="category-listed-7" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-5" title="category-label">labelable</a>, <a href="forms.html#category-submit" id="category-submit-6" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" id="category-reset-3" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-11">form-associated element</a>.</dd>
1.203 mike 858: <dt>Contexts in which this element can be used:</dt>
1.363 mike 859: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-145">phrasing content</a> is expected.</dd>
1.9 mike 860: <dt>Content model:</dt>
1.366 mike 861: <dd><a href="content-models.html#text-content" id="text-content-6" title="text content">Text</a>.</dd>
1.9 mike 862: <dt>Content attributes:</dt>
1.321 mike 863: <dd><a href="elements.html#global-attributes" id="global-attributes-93">Global attributes</a></dd>
1.156 mike 864: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-5">autofocus</a></code></dd>
865: <dd><code title="attr-textarea-cols"><a href="#attr-textarea-cols" id="cols">cols</a></code></dd>
1.383 mike 866: <dd><code title="attr-textarea-dirname"><a href="#attr-textarea-dirname" id="dirname-26">dirname</a></code></dd>
1.370 mike 867: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-17">disabled</a></code></dd>
1.262 mike 868: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-53">form</a></code></dd>
1.156 mike 869: <dd><code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength" id="maxlength-27">maxlength</a></code></dd>
870: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-41">name</a></code></dd>
871: <dd><code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder" id="placeholder-28">placeholder</a></code></dd>
1.187 mike 872: <dd><code title="attr-textarea-readonly"><a href="#attr-textarea-readonly" id="readonly-41">readonly</a></code></dd>
1.234 mike 873: <dd><code title="attr-textarea-required"><a href="#attr-textarea-required" id="required-32">required</a></code></dd>
1.156 mike 874: <dd><code title="attr-textarea-rows"><a href="#attr-textarea-rows" id="rows">rows</a></code></dd>
875: <dd><code title="attr-textarea-wrap"><a href="#attr-textarea-wrap" id="wrap">wrap</a></code></dd>
1.9 mike 876: <dt>DOM interface:</dt>
877: <dd>
1.321 mike 878: <pre class="idl">interface <dfn id="htmltextareaelement">HTMLTextAreaElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-104">HTMLElement</a> {
1.162 mike 879: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
880: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-cols" title='Read about this "cols" reference in the full HTML5 spec.'>cols</a>;
1.383 mike 881: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/.html#dom-textarea-dirname" title='Read about this "dirName" reference in the full HTML5 spec.'>dirName</a>;
1.162 mike 882: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
883: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-8">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
884: attribute long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-maxlength" title='Read about this "maxLength" reference in the full HTML5 spec.'>maxLength</a>;
885: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
886: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-placeholder" title='Read about this "placeholder" reference in the full HTML5 spec.'>placeholder</a>;
887: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-readonly" title='Read about this "readOnly" reference in the full HTML5 spec.'>readOnly</a>;
888: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-required" title='Read about this "required" reference in the full HTML5 spec.'>required</a>;
889: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-rows" title='Read about this "rows" reference in the full HTML5 spec.'>rows</a>;
890: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-wrap" title='Read about this "wrap" reference in the full HTML5 spec.'>wrap</a>;
891:
892: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
893: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-defaultvalue" title='Read about this "defaultValue" reference in the full HTML5 spec.'>defaultValue</a>;
894: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
895: readonly attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-textlength" title='Read about this "textLength" reference in the full HTML5 spec.'>textLength</a>;
896:
897: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
898: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
899: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
900: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
901: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
902:
903: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
904:
905: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-select" title='Read about this "select" reference in the full HTML5 spec.'>select</a>();
906: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-selectionstart" title='Read about this "selectionStart" reference in the full HTML5 spec.'>selectionStart</a>;
907: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-selectionend" title='Read about this "selectionEnd" reference in the full HTML5 spec.'>selectionEnd</a>;
908: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-setselectionrange" title='Read about this "setSelectionRange" reference in the full HTML5 spec.'>setSelectionRange</a>(in unsigned long start, in unsigned long end);
1.9 mike 909: };</pre>
910: </dd>
1.387 mike 911: </dl><p>The <code><a href="#the-textarea-element" id="textarea-24">textarea</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a
1.9 mike 912: multiline plain text edit control. The contents of the control represent the
1.388 mike 913: control's default value.<p>The <dfn id="attr-textarea-readonly" title="attr-textarea-readonly"><code>readonly</code></dfn> attribute
1.298 mike 914: is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-18">boolean attribute</a> used to control whether the text
1.160 mike 915: can be edited by the user or not.<p>The <dfn id="attr-textarea-cols" title="attr-textarea-cols"><code>cols</code></dfn>
1.9 mike 916: attribute specifies the expected maximum number of characters per
1.156 mike 917: line. If the <code title="attr-textarea-cols"><a href="#attr-textarea-cols" id="cols-0">cols</a></code> attribute
918: is specified, its value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer" id="valid-non-negative-integer-11">valid non-negative
1.160 mike 919: integer</a> greater than zero. <p>The <dfn id="attr-textarea-rows" title="attr-textarea-rows"><code>rows</code></dfn>
1.156 mike 920: attribute specifies the number of lines to show. If the <code title="attr-textarea-rows"><a href="#attr-textarea-rows" id="rows-0">rows</a></code> attribute is specified, its
921: value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer" id="valid-non-negative-integer-12">valid non-negative integer</a> greater than
1.160 mike 922: zero. <p>The <dfn id="attr-textarea-wrap" title="attr-textarea-wrap"><code>wrap</code></dfn>
1.304 mike 923: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute" id="enumerated-attribute-10">enumerated attribute</a> with two keywords
1.9 mike 924: and states: the <dfn id="attr-textarea-wrap-soft" title="attr-textarea-wrap-soft"><code>soft</code></dfn> keyword
1.198 mike 925: which maps to the <a href="#attr-textarea-wrap-soft-state" id="attr-textarea-wrap-soft-state-0" title="attr-textarea-wrap-soft-state">Soft</a> state, and the
1.9 mike 926: <dfn id="attr-textarea-wrap-hard" title="attr-textarea-wrap-hard"><code>hard</code></dfn> keyword
1.198 mike 927: which maps to the <a href="#attr-textarea-wrap-hard-state" id="attr-textarea-wrap-hard-state-0" title="attr-textarea-wrap-hard-state">Hard</a> state. The
928: <i>missing value default</i> is the <a href="#attr-textarea-wrap-soft-state" id="attr-textarea-wrap-soft-state-1" title="attr-textarea-wrap-soft-state">Soft</a> state.<p>The <dfn id="attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</dfn> state
1.388 mike 929: indicates that the text in the <code><a href="#the-textarea-element" id="textarea-25">textarea</a></code> is not to be
1.198 mike 930: wrapped when it is submitted (though it can still be wrapped in the
931: rendering).<p>The <dfn id="attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</dfn> state
1.388 mike 932: indicates that the text in the <code><a href="#the-textarea-element" id="textarea-26">textarea</a></code> is to have
1.198 mike 933: newlines added by the user agent so that the text is wrapped when it
934: is submitted.<p>If the element's <code title="attr-textarea-wrap"><a href="#attr-textarea-wrap" id="wrap-0">wrap</a></code>
935: attribute is in the <a href="#attr-textarea-wrap-hard-state" id="attr-textarea-wrap-hard-state-1" title="attr-textarea-wrap-hard-state">Hard</a> state, the <code title="attr-textarea-cols"><a href="#attr-textarea-cols" id="cols-1">cols</a></code> attribute must be
1.9 mike 936: specified.</p><!-- attr-textarea-wrap-off (attr-textarea-wrap-off-state): not
937: conforming; turns off the rendering of wrapping but otherwise acts
938: like 'soft' --><p>The <dfn id="attr-textarea-maxlength" title="attr-textarea-maxlength"><code>maxlength</code></dfn>
1.156 mike 939: attribute is a <a href="association-of-controls-and-forms.html#attr-fe-maxlength" id="attr-fe-maxlength-1" title="attr-fe-maxlength">form control <code title="">maxlength</code> attribute</a> controlled by the
1.388 mike 940: <code><a href="#the-textarea-element" id="textarea-27">textarea</a></code> element's <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-textarea-dirty" title='Read about this "dirty value flag" reference in the full HTML5 spec.'>dirty value flag</a>.<p>If the <code><a href="#the-textarea-element" id="textarea-28">textarea</a></code> element has a <a href="association-of-controls-and-forms.html#maximum-allowed-value-length" id="maximum-allowed-value-length-2">maximum allowed
1.9 mike 941: value length</a>, then the element's children must be such that
1.162 mike 942: the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/common-microsyntaxes.html#code-point-length" title='Read about this "code-point length" reference in the full HTML5 spec.'>code-point length</a> of the value of the element's
943: <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> IDL attribute is equal to or less than the
1.160 mike 944: element's <a href="association-of-controls-and-forms.html#maximum-allowed-value-length" id="maximum-allowed-value-length-3">maximum allowed value length</a>.<p>The <dfn id="attr-textarea-required" title="attr-textarea-required"><code>required</code></dfn> attribute
1.298 mike 945: is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-19">boolean attribute</a>. When specified, the user will
1.9 mike 946: be required to enter a value before submitting the form.</p><!-- similar text in the <input> section --><p>The <dfn id="attr-textarea-placeholder" title="attr-textarea-placeholder"><code>placeholder</code></dfn>
947: attribute represents a hint (a word or short phrase) intended to aid
948: the user with data entry. A hint could be a sample value or a brief
949: description of the expected format. The attribute, if specified,
950: must have a value that contains no U+000A LINE FEED (LF) or U+000D
1.160 mike 951: CARRIAGE RETURN (CR) characters.<p class="note">For a longer hint or other advisory text, the <code title="attr-title"><a href="elements.html#the-title-attribute" id="title-26">title</a></code> attribute is more appropriate.<p>The <code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder" id="placeholder-29">placeholder</a></code>
1.9 mike 952: attribute should not be used as an alternative to a
1.323 mike 953: <code><a href="forms.html#the-label-element" id="label-20">label</a></code>.<p>The <dfn id="attr-textarea-dirname" title="attr-textarea-dirname"><code>dirname</code></dfn>
954: attribute is a <a href="association-of-controls-and-forms.html#form-control-dirname-attribute" id="form-control-dirname-attribute-1">form control <code title="">dirname</code>
955: attribute</a>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-54">form</a></code> attribute is used to
1.388 mike 956: explicitly associate the <code><a href="#the-textarea-element" id="textarea-29">textarea</a></code> element with its
1.156 mike 957: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-10">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-42">name</a></code>
1.370 mike 958: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-18">disabled</a></code> attribute is used to make
1.9 mike 959: the control non-interactive and to prevent its value from being
1.156 mike 960: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-6">autofocus</a></code>
1.388 mike 961: attribute controls focus.<dl class="domintro"><dt><var title="">textarea</var> . <code title="attr-textarea-type">type</code></dt>
1.9 mike 962:
963: <dd>
964:
965: <p>Returns the string "<code title="">textarea</code>".</p>
966:
967: </dd>
968:
969: <dt><var title="">textarea</var> . <code title="attr-textarea-value">value</code></dt>
970:
971: <dd>
972:
973: <p>Returns the current value of the element.</p>
974:
975: <p>Can be set, to change the value.</p>
976:
977: </dd>
978:
979: </dl><div class="example">
980:
1.388 mike 981: <p>Here is an example of a <code><a href="#the-textarea-element" id="textarea-30">textarea</a></code> being used for
1.9 mike 982: unrestricted free-form text input in a form:</p>
983:
984: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments></textarea></p></pre>
985:
1.396 mike 986: <p>To specify a maximum length for the comments, one can use
1.323 mike 987: the <code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength" id="maxlength-28">maxlength</a></code>
988: attribute:</p>
989:
990: <pre><p>If you have any short comments, please let us know: <textarea cols=80 name=comments maxlength=200></textarea></p></pre>
991:
992: <p>To give a default value, text can be included inside the element:</p>
993:
994: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments>You rock!</textarea></p></pre>
995:
996: <p>To have the browser submit <a href="elements.html#the-directionality" id="the-directionality-9">the directionality</a> of
997: the element along with the value, the <code title="attr-textarea-dirname"><a href="#attr-textarea-dirname" id="dirname-27">dirname</a></code> attribute can be
998: specified:</p>
999:
1000: <pre><p>If you have any comments, please let us know (you may use either English or Hebrew for your comments):
1001: <textarea cols=80 name=comments dirname=comments.dir></textarea></p></pre>
1002:
1.202 mike 1003: </div><h4 id="the-keygen-element"><span class="secno">4.10.14 </span>The <dfn><code>keygen</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 1004: <dd><a href="content-models.html#flow-content" id="flow-content-129">Flow content</a>.</dd>
1.363 mike 1005: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-146">Phrasing content</a>.</dd>
1.156 mike 1006: <dd><a href="content-models.html#interactive-content" id="interactive-content-18">Interactive content</a>.</dd>
1.202 mike 1007: <dd><a href="forms.html#category-listed" id="category-listed-8" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-6" title="category-label">labelable</a>, <a href="forms.html#category-submit" id="category-submit-7" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" id="category-reset-4" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-12">form-associated element</a>.</dd>
1.203 mike 1008: <dt>Contexts in which this element can be used:</dt>
1.363 mike 1009: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-147">phrasing content</a> is expected.</dd>
1.9 mike 1010: <dt>Content model:</dt>
1011: <dd>Empty.</dd>
1012: <dt>Content attributes:</dt>
1.321 mike 1013: <dd><a href="elements.html#global-attributes" id="global-attributes-94">Global attributes</a></dd>
1.156 mike 1014: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-7">autofocus</a></code></dd>
1015: <dd><code title="attr-keygen-challenge"><a href="#attr-keygen-challenge" id="challenge">challenge</a></code></dd>
1.370 mike 1016: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-19">disabled</a></code></dd>
1.262 mike 1017: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-55">form</a></code></dd>
1.156 mike 1018: <dd><code title="attr-keygen-keytype"><a href="#attr-keygen-keytype" id="keytype">keytype</a></code></dd>
1019: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-43">name</a></code></dd>
1.9 mike 1020: <dt>DOM interface:</dt>
1021: <dd>
1.321 mike 1022: <pre class="idl">interface <dfn id="htmlkeygenelement">HTMLKeygenElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-105">HTMLElement</a> {
1.162 mike 1023: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
1024: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-keygen-challenge" title='Read about this "challenge" reference in the full HTML5 spec.'>challenge</a>;
1025: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
1026: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-9">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1027: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-keygen-keytype" title='Read about this "keytype" reference in the full HTML5 spec.'>keytype</a>;
1028: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
1029:
1030: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-keygen-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
1031:
1032: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
1033: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
1034: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
1035: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
1036: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.9 mike 1037:
1.162 mike 1038: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 1039: };</pre>
1040: </dd>
1.190 mike 1041: </dl><p>The <code><a href="#the-keygen-element" id="keygen-12">keygen</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a key
1.9 mike 1042: pair generator control. When the control's form is submitted, the
1043: private key is stored in the local keystore, and the public key is
1.160 mike 1044: packaged and sent to the server.<p>The <dfn id="attr-keygen-challenge" title="attr-keygen-challenge"><code>challenge</code></dfn> attribute
1.9 mike 1045: may be specified. Its value will be packaged with the submitted
1.160 mike 1046: key.<p>The <dfn id="attr-keygen-keytype" title="attr-keygen-keytype"><code>keytype</code></dfn>
1.304 mike 1047: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute" id="enumerated-attribute-11">enumerated attribute</a>. The following
1.160 mike 1048: table lists the keywords and states for the attribute — the
1.9 mike 1049: keywords in the left column map to the states listed in the cell in
1050: the second column on the same row as the keyword. User agents are
1.26 mike 1051: not required to support these values, and must only recognize values
1.160 mike 1052: whose corresponding algorithms they support.<table><thead><tr><th> Keyword <th> State
1053: <tbody><tr><td> <code title="">rsa</code>
1054: <td> <i title="">RSA</i>
1.9 mike 1055: <!-- v2 (see below)
1056: <tr>
1057: <td> <code title="">ec</code>
1058: <td> <i title="">EC</i>
1059: -->
1.160 mike 1060: </table><p>The <i>invalid value default</i> state is the <i title="">unknown</i> state. The <i>missing value default</i> state
1061: is the <i title="">RSA</i> state, if it is supported, or the <i title="">unknown</i> state otherwise.<p class="note">This specification does not specify what key types
1062: user agents are to support — it is possible for a user agent
1.262 mike 1063: to not support any key types at all.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-56">form</a></code> attribute is used to
1.190 mike 1064: explicitly associate the <code><a href="#the-keygen-element" id="keygen-13">keygen</a></code> element with its
1.156 mike 1065: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-11">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-44">name</a></code>
1.370 mike 1066: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-20">disabled</a></code> attribute is used to make
1.9 mike 1067: the control non-interactive and to prevent its value from being
1.156 mike 1068: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-8">autofocus</a></code>
1.160 mike 1069: attribute controls focus.<dl class="domintro"><dt><var title="">keygen</var> . <code title="attr-keygen-type">type</code></dt>
1.9 mike 1070:
1071: <dd>
1072:
1073: <p>Returns the string "<code title="">keygen</code>".</p>
1074:
1075: </dd>
1076:
1077: </dl><p class="note">This specification does not specify how the private
1078: key generated is to be used. It is expected that after receiving the
1.162 mike 1079: <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#signedpublickeyandchallenge" title='Read about this "SignedPublicKeyAndChallenge" reference in the full HTML5 spec.'>SignedPublicKeyAndChallenge</a></code> (SPKAC) structure, the
1.9 mike 1080: server will generate a client certificate and offer it back to the
1081: user for download; this certificate, once downloaded and stored in
1082: the key store along with the private key, can then be used to
1.88 mike 1083: authenticate to services that use TLS and certificate
1.9 mike 1084: authentication.</p><!-- how does the UA know which private key is associated with a
1085: certificate it gets back after the server has taken the public key
1086: created by <keygen> and turned it into a client cert? --><div class="example">
1087:
1088: <p>To generate a key pair, add the private key to the user's key
1089: store, and submit the public key to the server, markup such as the
1090: following can be used:</p>
1091:
1.22 mike 1092: <pre><form action="processkey.cgi" method="post" enctype="multipart/form-data">
1.9 mike 1093: <p><keygen name="key"></p>
1094: <p><input type=submit value="Submit key..."></p>
1095: </form></pre>
1096:
1097: <p>The server will then receive a form submission with a packaged
1098: RSA public key as the value of "<code title="">key</code>". This
1099: can then be used for various purposes, such as generating a client
1100: certificate, as mentioned above.</p>
1101:
1.202 mike 1102: </div><h4 id="the-output-element"><span class="secno">4.10.15 </span>The <dfn><code>output</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 1103: <dd><a href="content-models.html#flow-content" id="flow-content-130">Flow content</a>.</dd>
1.363 mike 1104: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-148">Phrasing content</a>.</dd>
1.202 mike 1105: <dd><a href="forms.html#category-listed" id="category-listed-9" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-7" title="category-label">labelable</a>, and <a href="forms.html#category-reset" id="category-reset-5" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-13">form-associated element</a>.</dd>
1.203 mike 1106: <dt>Contexts in which this element can be used:</dt>
1.363 mike 1107: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-149">phrasing content</a> is expected.</dd>
1.9 mike 1108: <dt>Content model:</dt>
1.363 mike 1109: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-150">Phrasing content</a>.</dd>
1.9 mike 1110: <dt>Content attributes:</dt>
1.321 mike 1111: <dd><a href="elements.html#global-attributes" id="global-attributes-95">Global attributes</a></dd>
1.156 mike 1112: <dd><code title="attr-output-for"><a href="#attr-output-for" id="for-2">for</a></code></dd>
1.262 mike 1113: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-57">form</a></code></dd>
1.156 mike 1114: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-45">name</a></code></dd>
1.9 mike 1115: <dt>DOM interface:</dt>
1116: <dd>
1.321 mike 1117: <pre class="idl">interface <dfn id="htmloutputelement">HTMLOutputElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-106">HTMLElement</a> {
1.407 ! mike 1118: [PutForwards=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/common-dom-interfaces.html#dom-domsettabletokenlist-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>] readonly attribute <a href="urls.html#domsettabletokenlist" id="domsettabletokenlist-6">DOMSettableTokenList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-htmlfor" title='Read about this "htmlFor" reference in the full HTML5 spec.'>htmlFor</a>;
1.162 mike 1119: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-10">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1120: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
1121:
1122: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
1123: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-defaultvalue" title='Read about this "defaultValue" reference in the full HTML5 spec.'>defaultValue</a>;
1124: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1125:
1126: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
1127: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
1128: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
1129: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
1130: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.11 mike 1131:
1.162 mike 1132: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 1133: };</pre>
1134: </dd>
1.162 mike 1135: </dl><p>The <code><a href="#the-output-element" id="output-11">output</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> the result of a
1.160 mike 1136: calculation.<p>The <dfn id="attr-output-for" title="attr-output-for"><code>for</code></dfn> content
1.9 mike 1137: attribute allows an explicit relationship to be made between the
1138: result of a calculation and the elements that represent the values
1139: that went into the calculation or that otherwise influenced the
1.156 mike 1140: calculation. The <code title="attr-output-for"><a href="#attr-output-for" id="for-3">for</a></code> attribute,
1.407 ! mike 1141: if specified, must contain a string consisting of an <a href="common-microsyntaxes.html#unordered-set-of-unique-space-separated-tokens" id="unordered-set-of-unique-space-separated-tokens-2">unordered
1.265 mike 1142: set of unique space-separated tokens</a> that are
1143: <a href="infrastructure.html#case-sensitive" id="case-sensitive-5">case-sensitive</a>, each of which must have the value of an
1144: <a href="elements.html#concept-id" id="concept-id-19" title="concept-id">ID</a> of an element in the same
1.262 mike 1145: <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#document" title='Read about this "Document" reference in the full HTML5 spec.'>Document</a></code>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-58">form</a></code> attribute is used to
1.156 mike 1146: explicitly associate the <code><a href="#the-output-element" id="output-12">output</a></code> element with its
1147: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-12">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-46">name</a></code>
1.162 mike 1148: attribute represents the element's name.<dl class="domintro"><dt><var title="">output</var> . <code title="dom-output-value"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 1149:
1150: <dd>
1151:
1152: <p>Returns the element's current value.</p>
1153:
1154: <p>Can be set, to change the value.</p>
1155:
1156: </dd>
1157:
1.162 mike 1158: <dt><var title="">output</var> . <code title="dom-output-defaultValue"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-defaultvalue" title='Read about this "defaultValue" reference in the full HTML5 spec.'>defaultValue</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 1159:
1160: <dd>
1161:
1162: <p>Returns the element's current default value.</p>
1163:
1164: <p>Can be set, to change the default value.</p>
1165:
1166: </dd>
1167:
1.162 mike 1168: <dt><var title="">output</var> . <code title="dom-output-type"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a></code></dt>
1.9 mike 1169:
1170: <dd>
1171:
1172: <p>Returns the string "<code title="">output</code>".</p>
1173:
1174: </dd>
1175:
1176: </dl><div class="example">
1177:
1.156 mike 1178: <p>A simple calculator could use <code><a href="#the-output-element" id="output-13">output</a></code> for its
1.9 mike 1179: display of calculated results:</p>
1180:
1.388 mike 1181: <pre><form onsubmit="return false" oninput="o.value = a.valueAsNumber + b.valueAsNumber">
1.9 mike 1182: <input name=a type=number step=any> +
1183: <input name=b type=number step=any> =
1.388 mike 1184: <output name=o></output>
1.9 mike 1185: </form></pre>
1186:
1.390 mike 1187: </div><h4 id="the-progress-element"><span class="secno">4.10.16 </span>The <dfn><code>progress</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 1188: <dd><a href="content-models.html#flow-content" id="flow-content-131">Flow content</a>.</dd>
1.363 mike 1189: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-151">Phrasing content</a>.</dd>
1.202 mike 1190: <dd><a href="forms.html#category-label" id="category-label-8" title="category-label">Labelable</a> <a href="forms.html#form-associated-element" id="form-associated-element-14">form-associated element</a>.</dd>
1.203 mike 1191: <dt>Contexts in which this element can be used:</dt>
1.363 mike 1192: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-152">phrasing content</a> is expected.</dd>
1.11 mike 1193: <dt>Content model:</dt>
1.363 mike 1194: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-153">Phrasing content</a>, but there must be no <code><a href="#the-progress-element" id="progress-8">progress</a></code> element descendants.</dd>
1.11 mike 1195: <dt>Content attributes:</dt>
1.321 mike 1196: <dd><a href="elements.html#global-attributes" id="global-attributes-96">Global attributes</a></dd>
1.255 mike 1197: <dd><code title="attr-progress-value"><a href="#attr-progress-value" id="value-38">value</a></code></dd>
1.156 mike 1198: <dd><code title="attr-progress-max"><a href="#attr-progress-max" id="max-36">max</a></code></dd>
1.262 mike 1199: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-59">form</a></code></dd>
1.11 mike 1200: <dt>DOM interface:</dt>
1201: <dd>
1.321 mike 1202: <pre class="idl">interface <dfn id="htmlprogresselement">HTMLProgressElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-107">HTMLElement</a> {
1.197 mike 1203: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1204: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-max" title='Read about this "max" reference in the full HTML5 spec.'>max</a>;
1205: readonly attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-position" title='Read about this "position" reference in the full HTML5 spec.'>position</a>;
1.162 mike 1206: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-11">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1207: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.11 mike 1208: };</pre>
1209: </dd>
1.162 mike 1210: </dl><p>The <code><a href="#the-progress-element" id="progress-9">progress</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> the
1.11 mike 1211: completion progress of a task. The progress is either indeterminate,
1212: indicating that progress is being made but that it is not clear how
1.278 mike 1213: much more work remains to be done before the task is complete (e.g.
1214: because the task is waiting for a remote host to respond), or the
1215: progress is a number in the range zero to a maximum, giving the
1.160 mike 1216: fraction of work that has so far been completed.<p>There are two attributes that determine the current task
1.278 mike 1217: completion represented by the element. The <dfn id="attr-progress-value" title="attr-progress-value"><code>value</code></dfn> attribute
1218: specifies how much of the task has been completed, and the <dfn id="attr-progress-max" title="attr-progress-max"><code>max</code></dfn> attribute specifies
1219: how much work the task requires in total. The units are arbitrary
1220: and not specified.<p>Authors are encouraged to also include the current value and the
1.11 mike 1221: maximum value inline as text inside the element, so that the
1.160 mike 1222: progress is made available to users of legacy user agents.<div class="example">
1.11 mike 1223: <p>Here is a snippet of a Web application that shows the progress
1224: of some automated task:</p>
1225: <pre><section>
1226: <h2>Task Progress</h2>
1227: <p>Progress: <progress id="p" max=100><span>0</span>%</progress></p>
1228: <script>
1229: var progressBar = document.getElementById('p');
1230: function updateProgress(newValue) {
1231: progressBar.value = newValue;
1232: progressBar.getElementsByTagName('span')[0].textContent = newValue;
1233: }
1234: </script>
1235: </section></pre>
1236: <p>(The <code>updateProgress()</code> method in this example would
1237: be called by some other code on the page to update the actual
1238: progress bar as the task progressed.)</p>
1.255 mike 1239: </div><p>The <code title="attr-progress-value"><a href="#attr-progress-value" id="value-39">value</a></code> and <code title="attr-progress-max"><a href="#attr-progress-max" id="max-37">max</a></code> attributes, when present, must
1.156 mike 1240: have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" id="valid-floating-point-number-9" title="valid floating point number">valid
1.255 mike 1241: floating point numbers</a>. The <code title="attr-progress-value"><a href="#attr-progress-value" id="value-40">value</a></code> attribute, if present, must
1.11 mike 1242: have a value equal to or greater than zero, and less than or equal
1.156 mike 1243: to the value of the <code title="attr-progress-max"><a href="#attr-progress-max" id="max-38">max</a></code>
1244: attribute, if present, or 1.0, otherwise. The <code title="attr-progress-max"><a href="#attr-progress-max" id="max-39">max</a></code> attribute, if present, must
1.160 mike 1245: have a value greater than zero.<p class="note">The <code><a href="#the-progress-element" id="progress-10">progress</a></code> element is the wrong
1.11 mike 1246: element to use for something that is just a gauge, as opposed to
1247: task progress. For instance, indicating disk space usage using
1.156 mike 1248: <code><a href="#the-progress-element" id="progress-11">progress</a></code> would be inappropriate. Instead, the
1.190 mike 1249: <code><a href="#the-meter-element" id="meter-8">meter</a></code> element is available for such use cases.<dl class="domintro"><dt><var title="">progress</var> . <code title="dom-progress-position"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-position" title='Read about this "position" reference in the full HTML5 spec.'>position</a></code></dt>
1.11 mike 1250:
1251: <dd>
1252:
1253: <p>For a determinate progress bar (one with known current and
1254: maximum values), returns the result of dividing the current value
1255: by the maximum value.</p>
1256:
1.160 mike 1257: <p>For an indeterminate progress bar, returns −1.</p>
1.11 mike 1258:
1.278 mike 1259: </dd>
1260:
1.351 mike 1261: </dl><h4 id="the-meter-element"><span class="secno">4.10.17 </span>The <dfn><code>meter</code></dfn> element</h4><!-- Keep this after <progress> and NOT close to <time> --><dl class="element"><dt>Categories</dt>
1.321 mike 1262: <dd><a href="content-models.html#flow-content" id="flow-content-132">Flow content</a>.</dd>
1.363 mike 1263: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-154">Phrasing content</a>.</dd>
1.202 mike 1264: <dd><a href="forms.html#category-label" id="category-label-9" title="category-label">Labelable</a> <a href="forms.html#form-associated-element" id="form-associated-element-15">form-associated element</a>.</dd>
1.203 mike 1265: <dt>Contexts in which this element can be used:</dt>
1.363 mike 1266: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-155">phrasing content</a> is expected.</dd>
1.11 mike 1267: <dt>Content model:</dt>
1.363 mike 1268: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-156">Phrasing content</a>, but there must be no <code><a href="#the-meter-element" id="meter-9">meter</a></code> element descendants.</dd>
1.11 mike 1269: <dt>Content attributes:</dt>
1.321 mike 1270: <dd><a href="elements.html#global-attributes" id="global-attributes-97">Global attributes</a></dd>
1.255 mike 1271: <dd><code title="attr-meter-value"><a href="#attr-meter-value" id="value-42">value</a></code></dd>
1.156 mike 1272: <dd><code title="attr-meter-min"><a href="#attr-meter-min" id="min-38">min</a></code></dd>
1273: <dd><code title="attr-meter-max"><a href="#attr-meter-max" id="max-41">max</a></code></dd>
1274: <dd><code title="attr-meter-low"><a href="#attr-meter-low" id="low">low</a></code></dd>
1275: <dd><code title="attr-meter-high"><a href="#attr-meter-high" id="high">high</a></code></dd>
1276: <dd><code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum">optimum</a></code></dd>
1.262 mike 1277: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-60">form</a></code></dd>
1.11 mike 1278: <dt>DOM interface:</dt>
1279: <dd>
1.321 mike 1280: <pre class="idl">interface <dfn id="htmlmeterelement">HTMLMeterElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-108">HTMLElement</a> {
1.197 mike 1281: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1282: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-min" title='Read about this "min" reference in the full HTML5 spec.'>min</a>;
1283: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-max" title='Read about this "max" reference in the full HTML5 spec.'>max</a>;
1284: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-low" title='Read about this "low" reference in the full HTML5 spec.'>low</a>;
1285: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-high" title='Read about this "high" reference in the full HTML5 spec.'>high</a>;
1286: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-optimum" title='Read about this "optimum" reference in the full HTML5 spec.'>optimum</a>;
1.162 mike 1287: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-12">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1288: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.11 mike 1289: };</pre>
1290: </dd>
1.190 mike 1291: </dl><p>The <code><a href="#the-meter-element" id="meter-10">meter</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a scalar
1.11 mike 1292: measurement within a known range, or a fractional value; for example
1293: disk usage, the relevance of a query result, or the fraction of a
1.190 mike 1294: voting population to have selected a particular candidate.<p>This is also known as a gauge.<p class="note">The <code><a href="#the-meter-element" id="meter-11">meter</a></code> element should not be used to
1.11 mike 1295: indicate progress (as in a progress bar). For that role, HTML
1.190 mike 1296: provides a separate <code><a href="#the-progress-element" id="progress-12">progress</a></code> element.<p class="note">The <code><a href="#the-meter-element" id="meter-12">meter</a></code> element also does not
1.160 mike 1297: represent a scalar value of arbitrary range — for example, it
1.11 mike 1298: would be wrong to use this to report a weight, or height, unless
1.160 mike 1299: there is a known maximum value.<p>There are six attributes that determine the semantics of the
1300: gauge represented by the element.<p>The <dfn id="attr-meter-min" title="attr-meter-min"><code>min</code></dfn> attribute
1.11 mike 1301: specifies the lower bound of the range, and the <dfn id="attr-meter-max" title="attr-meter-max"><code>max</code></dfn> attribute specifies
1302: the upper bound. The <dfn id="attr-meter-value" title="attr-meter-value"><code>value</code></dfn> attribute
1303: specifies the value to have the gauge indicate as the "measured"
1.160 mike 1304: value.<p>The other three attributes can be used to segment the gauge's
1.11 mike 1305: range into "low", "medium", and "high" parts, and to indicate which
1306: part of the gauge is the "optimum" part. The <dfn id="attr-meter-low" title="attr-meter-low"><code>low</code></dfn> attribute specifies
1307: the range that is considered to be the "low" part, and the <dfn id="attr-meter-high" title="attr-meter-high"><code>high</code></dfn> attribute specifies
1308: the range that is considered to be the "high" part. The <dfn id="attr-meter-optimum" title="attr-meter-optimum"><code>optimum</code></dfn> attribute
1309: gives the position that is "optimum"; if that is higher than the
1310: "high" value then this indicates that the higher the value, the
1311: better; if it's lower than the "low" mark then it indicates that
1312: lower values are better, and naturally if it is in between then it
1.255 mike 1313: indicates that neither high nor low values are good.<p> The <code title="attr-meter-value"><a href="#attr-meter-value" id="value-43">value</a></code> attribute must be
1314: specified. The <code title="attr-meter-value"><a href="#attr-meter-value" id="value-44">value</a></code>, <code title="attr-meter-min"><a href="#attr-meter-min" id="min-39">min</a></code>, <code title="attr-meter-low"><a href="#attr-meter-low" id="low-0">low</a></code>, <code title="attr-meter-high"><a href="#attr-meter-high" id="high-0">high</a></code>, <code title="attr-meter-max"><a href="#attr-meter-max" id="max-42">max</a></code>, and <code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum-0">optimum</a></code> attributes, when present,
1.156 mike 1315: must have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" id="valid-floating-point-number-10" title="valid floating point
1.255 mike 1316: number">valid floating point numbers</a>.<p>In addition, the attributes' values are further constrained:<p>Let <var title="">value</var> be the <code title="attr-meter-value"><a href="#attr-meter-value" id="value-45">value</a></code> attribute's number.<p>If the <code title="attr-meter-min"><a href="#attr-meter-min" id="min-40">min</a></code> attribute
1.11 mike 1317: attribute is specified, then let <var title="">minimum</var> be that
1.160 mike 1318: attribute's value; otherwise, let it be zero.<p>If the <code title="attr-meter-max"><a href="#attr-meter-max" id="max-43">max</a></code> attribute
1.11 mike 1319: attribute is specified, then let <var title="">maximum</var> be that
1.160 mike 1320: attribute's value; otherwise, let it be 1.0.<p>The following inequalities must hold, as applicable:<ul class="brief"><li><var title="">minimum</var> ≤ <var title="">value</var> ≤ <var title="">maximum</var></li>
1321: <li><var title="">minimum</var> ≤ <code title="attr-meter-low"><a href="#attr-meter-low" id="low-1">low</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-low"><a href="#attr-meter-low" id="low-2">low</a></code> is specified)</li>
1322: <li><var title="">minimum</var> ≤ <code title="attr-meter-high"><a href="#attr-meter-high" id="high-1">high</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-high"><a href="#attr-meter-high" id="high-2">high</a></code> is specified)</li>
1323: <li><var title="">minimum</var> ≤ <code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum-1">optimum</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum-2">optimum</a></code> is specified)</li>
1324: <li><code title="attr-meter-low"><a href="#attr-meter-low" id="low-3">low</a></code> ≤ <code title="attr-meter-high"><a href="#attr-meter-high" id="high-3">high</a></code> (if both <code title="attr-meter-low"><a href="#attr-meter-low" id="low-4">low</a></code> and <code title="attr-meter-high"><a href="#attr-meter-high" id="high-4">high</a></code> are specified)</li>
1.21 mike 1325: </ul><p class="note">If no minimum or maximum is specified, then the
1.11 mike 1326: range is assumed to be 0..1, and the value thus has to be within
1.160 mike 1327: that range.<p>Authors are encouraged to include a textual representation of the
1.11 mike 1328: gauge's state in the element's contents, for users of user agents
1.190 mike 1329: that do not support the <code><a href="#the-meter-element" id="meter-13">meter</a></code> element.<div class="example">
1.11 mike 1330:
1331: <p>The following examples show three gauges that would all be
1332: three-quarters full:</p>
1333:
1334: <pre>Storage space usage: <meter value=6 max=8>6 blocks used (out of 8 total)</meter>
1335: Voter turnout: <meter value=0.75><img alt="75%" src="graph75.png"></meter>
1336: Tickets sold: <meter min="0" max="100" value="75"></meter></pre>
1337:
1338: <p>The following example is incorrect use of the element, because
1339: it doesn't give a range (and since the default maximum is 1, both
1340: of the gauges would end up looking maxed out):</p>
1341:
1342: <pre class="bad"><p>The grapefruit pie had a radius of <meter value=12>12cm</meter>
1343: and a height of <meter value=2>2cm</meter>.</p> <!-- <strong>BAD!</strong> --></pre>
1344:
1345: <p>Instead, one would either not include the meter element, or use
1346: the meter element with a defined range to give the dimensions in
1347: context compared to other pies:</p>
1348:
1349: <pre><p>The grapefruit pie had a radius of 12cm and a height of
1350: 2cm.</p>
1351: <dl>
1352: <dt>Radius: <dd> <meter min=0 max=20 value=12>12cm</meter>
1353: <dt>Height: <dd> <meter min=0 max=10 value=2>2cm</meter>
1354: </dl></pre>
1355:
1356: </div><p>There is no explicit way to specify units in the
1.190 mike 1357: <code><a href="#the-meter-element" id="meter-14">meter</a></code> element, but the units may be specified in the
1.160 mike 1358: <code title="attr-title"><a href="elements.html#the-title-attribute" id="title-27">title</a></code> attribute in free-form text.<div class="example">
1.11 mike 1359:
1360: <p>The example above could be extended to mention the units:</p>
1361:
1362: <pre><dl>
1363: <dt>Radius: <dd> <meter min=0 max=20 value=12 title="centimeters">12cm</meter>
1364: <dt>Height: <dd> <meter min=0 max=10 value=2 title="centimeters">2cm</meter>
1365: </dl></pre>
1366:
1367: </div><div class="example">
1368: <p>The following markup:</p>
1369: <pre><h3>Suggested groups</h3>
1370: <menu type="toolbar">
1371: <a href="?cmd=hsg" onclick="hideSuggestedGroups()">Hide suggested groups</a>
1372: </menu>
1373: <ul>
1374: <li>
1375: <p><a href="/group/comp.infosystems.www.authoring.stylesheets/view">comp.infosystems.www.authoring.stylesheets</a> -
1376: <a href="/group/comp.infosystems.www.authoring.stylesheets/subscribe">join</a></p>
1377: <p>Group description: <strong>Layout/presentation on the WWW.</strong></p>
1378: <p><strong><meter value="0.5">Moderate activity,</meter></strong> Usenet, 618 subscribers</p>
1379: </li>
1380: <li>
1381: <p><a href="/group/netscape.public.mozilla.xpinstall/view">netscape.public.mozilla.xpinstall</a> -
1382: <a href="/group/netscape.public.mozilla.xpinstall/subscribe">join</a></p>
1383: <p>Group description: <strong>Mozilla XPInstall discussion.</strong></p>
1384: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 22 subscribers</p>
1385: </li>
1386: <li>
1387: <p><a href="/group/mozilla.dev.general/view">mozilla.dev.general</a> -
1388: <a href="/group/mozilla.dev.general/subscribe">join</a></p>
1389: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 66 subscribers</p>
1390: </li>
1391: </ul></pre>
1392: <p>Might be rendered as follows:</p>
1.203 mike 1393: <p><img alt="With the <meter> elements rendered as inline green bars of varying lengths." height="178" src="http://dev.w3.org/html5/spec/images/sample-meter.png" width="332"></p>
1.13 mike 1394: </div><p>User agents combine the value of
1.156 mike 1395: the <code title="attr-title"><a href="elements.html#the-title-attribute" id="title-28">title</a></code> attribute and the other
1.11 mike 1396: attributes to provide context-sensitive help or inline text
1.160 mike 1397: detailing the actual values.<div class="example">
1.11 mike 1398: <p>For example, the following snippet:</p>
1399: <pre><meter min=0 max=60 value=23.2 title=seconds></meter></pre>
1400: <p>...might cause the user agent to display a gauge with a tooltip
1401: saying "Value: 23.2 out of 60." on one line and "seconds" on a
1402: second line.</p>
1.262 mike 1403: </div><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-61">form</a></code> attribute is used to
1.190 mike 1404: explicitly associate the <code><a href="#the-meter-element" id="meter-15">meter</a></code> element with its
1.160 mike 1405: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-13">form owner</a>.<div class="example">
1.11 mike 1406:
1407: <p>The following example shows how a gauge could fall back to
1408: localized or pretty-printed text.</p>
1409:
1.160 mike 1410: <pre><p>Disk usage: <meter min=0 value=170261928 max=233257824>170 261 928 bytes used
1411: out of 233 257 824 bytes available</meter></p></pre>
1.11 mike 1412:
1.160 mike 1413: </div>
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