Annotation of html5/spec-author-view/the-button-element.html, revision 1.37
1.1 mike 1: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
2: <!DOCTYPE html>
1.37 ! mike 3: <!-- when publishing, change bits marked ZZZ --><html lang="en-US-x-Hixie" class="split chapter"><head><title>4.10.8 The button element — HTML5 (Edition for Web Authors)</title><script src="link-fixup.js"></script><link href="whatwg.css" rel="stylesheet"><style type="text/css">
1.1 mike 4: pre { margin-left: 2em; white-space: pre-wrap; }
5: h2 { margin: 3em 0 1em 0; }
6: h3 { margin: 2.5em 0 1em 0; }
7: h4 { margin: 2.5em 0 0.75em 0; }
8: h5, h6 { margin: 2.5em 0 1em; }
9: h1 + h2, h1 + h2 + h2 { margin: 0.75em 0 0.75em; }
10: h2 + h3, h3 + h4, h4 + h5, h5 + h6 { margin-top: 0.5em; }
11: p { margin: 1em 0; }
12: hr:not(.top) { display: block; background: none; border: none; padding: 0; margin: 2em 0; height: auto; }
13: dl, dd { margin-top: 0; margin-bottom: 0; }
14: dt { margin-top: 0.75em; margin-bottom: 0.25em; clear: left; }
15: dt + dt { margin-top: 0; }
16: dd dt { margin-top: 0.25em; margin-bottom: 0; }
17: dd p { margin-top: 0; }
18: dd dl + p { margin-top: 1em; }
19: dd table + p { margin-top: 1em; }
20: p + * > li, dd li { margin: 1em 0; }
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22: dt dfn { font-style: italic; }
23: pre, code { font-size: inherit; font-family: monospace; font-variant: normal; }
24: pre strong { color: black; font: inherit; font-weight: bold; background: yellow; }
25: pre em { font-weight: bolder; font-style: normal; }
26: @media screen { code { color: orangered; } code :link, code :visited { color: inherit; } }
27: var sub { vertical-align: bottom; font-size: smaller; position: relative; top: 0.1em; }
28: table { border-collapse: collapse; border-style: hidden hidden none hidden; }
1.34 mike 29: table thead, table tbody { border-bottom: solid; }
1.1 mike 30: table tbody th:first-child { border-left: solid; }
31: table tbody th { text-align: left; }
32: table td, table th { border-left: solid; border-right: solid; border-bottom: solid thin; vertical-align: top; padding: 0.2em; }
33: blockquote { margin: 0 0 0 2em; border: 0; padding: 0; font-style: italic; }
34:
35: .bad, .bad *:not(.XXX) { color: gray; border-color: gray; background: transparent; }
36: .matrix, .matrix td { border: none; text-align: right; }
37: .matrix { margin-left: 2em; }
38: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
39: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
40: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
41:
42: .toc dfn, h1 dfn, h2 dfn, h3 dfn, h4 dfn, h5 dfn, h6 dfn { font: inherit; }
43: img.extra { float: right; }
44: pre.idl { border: solid thin; background: #EEEEEE; color: black; padding: 0.5em 1em; }
45: pre.idl :link, pre.idl :visited { color: inherit; background: transparent; }
46: pre.css { border: solid thin; background: #FFFFEE; color: black; padding: 0.5em 1em; }
47: pre.css:first-line { color: #AAAA50; }
1.23 mike 48: dl.domintro { color: green; margin: 2em 0 2em 2em; padding: 0.5em 1em; border: none; background: #DDFFDD; }
1.1 mike 49: hr + dl.domintro, div.impl + dl.domintro { margin-top: 2.5em; margin-bottom: 1.5em; }
50: dl.domintro dt, dl.domintro dt * { color: black; text-decoration: none; }
51: dl.domintro dd { margin: 0.5em 0 1em 2em; padding: 0; }
52: dl.domintro dd p { margin: 0.5em 0; }
53: dl.switch { padding-left: 2em; }
54: dl.switch > dt { text-indent: -1.5em; }
55: dl.switch > dt:before { content: '\21AA'; padding: 0 0.5em 0 0; display: inline-block; width: 1em; text-align: right; line-height: 0.5em; }
56: dl.triple { padding: 0 0 0 1em; }
57: dl.triple dt, dl.triple dd { margin: 0; display: inline }
58: dl.triple dt:after { content: ':'; }
59: dl.triple dd:after { content: '\A'; white-space: pre; }
60: .diff-old { text-decoration: line-through; color: silver; background: transparent; }
61: .diff-chg, .diff-new { text-decoration: underline; color: green; background: transparent; }
62: a .diff-new { border-bottom: 1px blue solid; }
63:
64: h2 { page-break-before: always; }
65: h1, h2, h3, h4, h5, h6 { page-break-after: avoid; }
66: h1 + h2, hr + h2.no-toc { page-break-before: auto; }
67:
68: p > span:not([title=""]):not([class="XXX"]):not([class="impl"]), li > span:not([title=""]):not([class="XXX"]):not([class="impl"]) { border-bottom: solid #9999CC; }
69:
70: div.head { margin: 0 0 1em; padding: 1em 0 0 0; }
71: div.head p { margin: 0; }
72: div.head h1 { margin: 0; }
73: div.head .logo { float: right; margin: 0 1em; }
74: div.head .logo img { border: none } /* remove border from top image */
75: div.head dl { margin: 1em 0; }
76: div.head p.copyright, div.head p.alt { font-size: x-small; font-style: oblique; margin: 0; }
77:
78: body > .toc > li { margin-top: 1em; margin-bottom: 1em; }
79: body > .toc.brief > li { margin-top: 0.35em; margin-bottom: 0.35em; }
80: body > .toc > li > * { margin-bottom: 0.5em; }
81: body > .toc > li > * > li > * { margin-bottom: 0.25em; }
82: .toc, .toc li { list-style: none; }
83:
84: .brief { margin-top: 1em; margin-bottom: 1em; line-height: 1.1; }
85: .brief li { margin: 0; padding: 0; }
86: .brief li p { margin: 0; padding: 0; }
87:
88: .category-list { margin-top: -0.75em; margin-bottom: 1em; line-height: 1.5; }
89: .category-list::before { content: '\21D2\A0'; font-size: 1.2em; font-weight: 900; }
90: .category-list li { display: inline; }
91: .category-list li:not(:last-child)::after { content: ', '; }
92: .category-list li > span, .category-list li > a { text-transform: lowercase; }
93: .category-list li * { text-transform: none; } /* don't affect <code> nested in <a> */
94:
95: .XXX { color: #E50000; background: white; border: solid red; padding: 0.5em; margin: 1em 0; }
96: .XXX > :first-child { margin-top: 0; }
97: p .XXX { line-height: 3em; }
98: .annotation { border: solid thin black; background: #0C479D; color: white; position: relative; margin: 8px 0 20px 0; }
99: .annotation:before { position: absolute; left: 0; top: 0; width: 100%; height: 100%; margin: 6px -6px -6px 6px; background: #333333; z-index: -1; content: ''; }
100: .annotation :link, .annotation :visited { color: inherit; }
101: .annotation :link:hover, .annotation :visited:hover { background: transparent; }
102: .annotation span { border: none ! important; }
103: .note { color: green; background: transparent; font-family: sans-serif; }
104: .warning { color: red; background: transparent; }
105: .note, .warning { font-weight: bolder; font-style: italic; }
106: p.note, div.note { padding: 0.5em 2em; }
107: span.note { padding: 0 2em; }
108: .note p:first-child, .warning p:first-child { margin-top: 0; }
109: .note p:last-child, .warning p:last-child { margin-bottom: 0; }
110: .warning:before { font-style: normal; }
111: p.note:before { content: 'Note: '; }
112: p.warning:before { content: '\26A0 Warning! '; }
113:
114: .bookkeeping:before { display: block; content: 'Bookkeeping details'; font-weight: bolder; font-style: italic; }
115: .bookkeeping { font-size: 0.8em; margin: 2em 0; }
116: .bookkeeping p { margin: 0.5em 2em; display: list-item; list-style: square; }
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118: h4 { position: relative; z-index: 3; }
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145:
146: ul.domTree, ul.domTree ul { padding: 0 0 0 1em; margin: 0; }
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148: ul.domTree li li { list-style: none; }
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151: ul.domTree span { font-style: italic; font-family: serif; }
152: ul.domTree .t1 code { color: purple; font-weight: bold; }
153: ul.domTree .t2 { font-style: normal; font-family: monospace; }
154: ul.domTree .t2 .name { color: black; font-weight: bold; }
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156: ul.domTree .t3 code, .domTree .t4 code, .domTree .t5 code { color: gray; }
157: ul.domTree .t7 code, .domTree .t8 code { color: green; }
158: ul.domTree .t10 code { color: teal; }
159:
1.14 mike 160: body.dfnEnabled dfn { cursor: pointer; }
161: .dfnPanel {
162: display: inline;
163: position: absolute;
164: z-index: 10;
165: height: auto;
166: width: auto;
167: padding: 0.5em 0.75em;
168: font: small sans-serif, Droid Sans Fallback;
169: background: #DDDDDD;
170: color: black;
171: border: outset 0.2em;
172: }
173: .dfnPanel * { margin: 0; padding: 0; font: inherit; text-indent: 0; }
174: .dfnPanel :link, .dfnPanel :visited { color: black; }
175: .dfnPanel p { font-weight: bolder; }
176: .dfnPanel * + p { margin-top: 0.25em; }
177: .dfnPanel li { list-style-position: inside; }
178:
1.1 mike 179: #configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
180: #configUI p { margin: 0.5em 0; padding: 0.3em; background: #EEEEEE; color: black; border: inset thin; }
181: #configUI p label { display: block; }
182: #configUI #updateUI, #configUI .loginUI { text-align: center; }
183: #configUI input[type=button] { display: block; margin: auto; }
184: </style><style type="text/css">
185:
186: .applies thead th > * { display: block; }
187: .applies thead code { display: block; }
188: .applies tbody th { whitespace: nowrap; }
189: .applies td { text-align: center; }
190: .applies .yes { background: yellow; }
191:
192: .matrix, .matrix td { border: none; text-align: right; }
193: .matrix { margin-left: 2em; }
194:
195: .dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
196: .dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
197: .dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
198:
199: #table-example-1 { border: solid thin; border-collapse: collapse; margin-left: 3em; }
200: #table-example-1 * { font-family: "Essays1743", serif; line-height: 1.01em; }
201: #table-example-1 caption { padding-bottom: 0.5em; }
202: #table-example-1 thead, #table-example-1 tbody { border: none; }
203: #table-example-1 th, #table-example-1 td { border: solid thin; }
204: #table-example-1 th { font-weight: normal; }
205: #table-example-1 td { border-style: none solid; vertical-align: top; }
206: #table-example-1 th { padding: 0.5em; vertical-align: middle; text-align: center; }
207: #table-example-1 tbody tr:first-child td { padding-top: 0.5em; }
208: #table-example-1 tbody tr:last-child td { padding-bottom: 1.5em; }
209: #table-example-1 tbody td:first-child { padding-left: 2.5em; padding-right: 0; width: 9em; }
210: #table-example-1 tbody td:first-child::after { content: leader(". "); }
211: #table-example-1 tbody td { padding-left: 2em; padding-right: 2em; }
212: #table-example-1 tbody td:first-child + td { width: 10em; }
213: #table-example-1 tbody td:first-child + td ~ td { width: 2.5em; }
214: #table-example-1 tbody td:first-child + td + td + td ~ td { width: 1.25em; }
215:
216: .apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
217: .apple-table-examples * { font-family: "Times", serif; }
218: .apple-table-examples td, .apple-table-examples th { border: none; white-space: nowrap; padding-top: 0; padding-bottom: 0; }
219: .apple-table-examples tbody th:first-child { border-left: none; width: 100%; }
220: .apple-table-examples thead th:first-child ~ th { font-size: smaller; font-weight: bolder; border-bottom: solid 2px; text-align: center; }
221: .apple-table-examples tbody th::after, .apple-table-examples tfoot th::after { content: leader(". ") }
222: .apple-table-examples tbody th, .apple-table-examples tfoot th { font: inherit; text-align: left; }
223: .apple-table-examples td { text-align: right; vertical-align: top; }
224: .apple-table-examples.e1 tbody tr:last-child td { border-bottom: solid 1px; }
1.9 mike 225: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
226: .apple-table-examples.e2 th[scope=row] { padding-left: 1em; }
227: .apple-table-examples sup { line-height: 0; }
228:
1.11 mike 229: .details-example img { vertical-align: top; }
230:
1.26 mike 231: #named-character-references-table {
232: font-size: 0.6em;
233: column-width: 28em;
234: column-gap: 1em;
235: -moz-column-width: 28em;
236: -moz-column-gap: 1em;
237: -webkit-column-width: 28em;
238: -webkit-column-gap: 1em;
239: }
240: #named-character-references-table > table > tbody > tr > td:last-child { text-align: center; }
241: #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; }
242:
1.35 mike 243: .glyph.control { color: red; }
244:
1.24 mike 245: </style><style type="text/css">
1.25 mike 246: .domintro:before { display: table; margin: -1em -0.5em -0.5em auto; width: auto; content: 'This box is non-normative. Implementation requirements are given below this box.'; color: black; font-style: italic; border: solid 2px; background: white; padding: 0 0.25em; }
247: </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">
1.9 mike 248: function getCookie(name) {
249: var params = location.search.substr(1).split("&");
250: for (var index = 0; index < params.length; index++) {
251: if (params[index] == name)
252: return "1";
253: var data = params[index].split("=");
254: if (data[0] == name)
255: return unescape(data[1]);
256: }
257: var cookies = document.cookie.split("; ");
258: for (var index = 0; index < cookies.length; index++) {
259: var data = cookies[index].split("=");
260: if (data[0] == name)
261: return unescape(data[1]);
262: }
263: return null;
264: }
265: function load(script) {
266: var e = document.createElement('script');
267: e.setAttribute('src', 'http://www.whatwg.org/specs/web-apps/current-work/' + script + '?' + encodeURIComponent(location) + '&' + encodeURIComponent(document.referrer));
268: document.body.appendChild(e);
269: }
270: function init() {
271: if (location.search == '?slow-browser')
272: return;
273: var configUI = document.createElement('div');
274: configUI.id = 'configUI';
275: document.body.appendChild(configUI);
276: // load('reviewer.js'); // would need cross-site XHR
277: if (document.getElementById('head'))
278: load('toc.js');
279:
280: // load('updater.js'); // would need cross-site XHR
1.11 mike 281: load('dfn.js'); // doesn't support split-out specs, but, oh well.
1.9 mike 282: // load('status.js'); // would need cross-site XHR
283: if (getCookie('profile') == '1')
284: document.getElementsByTagName('h2')[0].textContent += '; load: ' + (new Date() - loadTimer) + 'ms';
285: fixBrokenLink();
286: }
1.31 mike 287: </script><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><link href="common-input-element-attributes.html" title="4.10.7.2 Common input element attributes" rel="prev">
1.9 mike 288: <link href="Overview.html#contents" title="Table of contents" rel="index">
1.20 mike 289: <link href="association-of-controls-and-forms.html" title="4.10.18 Association of controls and forms" rel="next">
1.9 mike 290: </head><body onload="fixBrokenLink(); init()"><div class="head" id="head">
291: <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 292:
1.37 ! mike 293: <h1>HTML5 (Edition for Web Authors)</h1>
1.9 mike 294: </div><div>
1.20 mike 295: <a href="common-input-element-attributes.html">← 4.10.7.2 Common input element attributes</a> –
1.9 mike 296: <a href="Overview.html#contents">Table of contents</a> –
1.20 mike 297: <a href="association-of-controls-and-forms.html">4.10.18 Association of controls and forms →</a>
298: <ol class="toc"><li><ol><li><ol><li><a href="the-button-element.html#the-button-element"><span class="secno">4.10.8 </span>The <code>button</code> element</a></li><li><a href="the-button-element.html#the-select-element"><span class="secno">4.10.9 </span>The <code>select</code> element</a></li><li><a href="the-button-element.html#the-datalist-element"><span class="secno">4.10.10 </span>The <code>datalist</code> element</a></li><li><a href="the-button-element.html#the-optgroup-element"><span class="secno">4.10.11 </span>The <code>optgroup</code> element</a></li><li><a href="the-button-element.html#the-option-element"><span class="secno">4.10.12 </span>The <code>option</code> element</a></li><li><a href="the-button-element.html#the-textarea-element"><span class="secno">4.10.13 </span>The <code>textarea</code> element</a></li><li><a href="the-button-element.html#the-keygen-element"><span class="secno">4.10.14 </span>The <code>keygen</code> element</a></li><li><a href="the-button-element.html#the-output-element"><span class="secno">4.10.15 </span>The <code>output</code> element</a></li><li><a href="the-button-element.html#the-progress-element"><span class="secno">4.10.16 </span>The <code>progress</code> element</a></li><li><a href="the-button-element.html#the-meter-element"><span class="secno">4.10.17 </span>The <code>meter</code> element</a></li></ol></li></ol></li></ol></div>
1.9 mike 299:
1.30 mike 300: <h4 id="the-button-element"><span class="secno">4.10.8 </span>The <dfn><code>button</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
1.9 mike 301: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
302: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
303: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
304: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</a>, and <a href="forms.html#category-submit" title="category-submit">submittable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
305: <dt>Contexts in which this element may be used:</dt>
306: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
307: <dt>Content model:</dt>
308: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>, but there must be no <a href="content-models.html#interactive-content">interactive content</a> descendant.</dd>
309: <dt>Content attributes:</dt>
310: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
311: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
312: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
313: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
314: <dd><code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code></dd>
315: <dd><code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code></dd>
316: <dd><code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code></dd>
317: <dd><code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code></dd>
318: <dd><code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code></dd>
319: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
320: <dd><code title="attr-button-type"><a href="#attr-button-type">type</a></code></dd>
321: <dd><code title="attr-button-value"><a href="#attr-button-value">value</a></code></dd>
322: <dt>DOM interface:</dt>
323: <dd>
324: <pre class="idl">interface <dfn id="htmlbuttonelement">HTMLButtonElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
325: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
326: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
327: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
328: attribute DOMString <a href="#dom-fs-formaction" title="dom-fs-formAction">formAction</a>;
329: attribute DOMString <a href="#dom-fs-formenctype" title="dom-fs-formEnctype">formEnctype</a>;
330: attribute DOMString <a href="#dom-fs-formmethod" title="dom-fs-formMethod">formMethod</a>;
331: attribute DOMString <a href="#dom-fs-formnovalidate" title="dom-fs-formNoValidate">formNoValidate</a>;
332: attribute DOMString <a href="#dom-fs-formtarget" title="dom-fs-formTarget">formTarget</a>;
333: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
334: attribute DOMString <a href="#dom-button-type" title="dom-button-type">type</a>;
335: attribute DOMString <a href="#dom-button-value" title="dom-button-value">value</a>;
336:
337: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
338: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
339: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
340: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
341: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
342:
1.19 mike 343: readonly attribute <a href="#nodelist">NodeList</a> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
1.9 mike 344: };</pre>
345: </dd>
346: </dl><p>The <code><a href="#the-button-element">button</a></code> element <a href="#represents">represents</a> a
347: button. </p><p>The element is a <a href="forms.html#concept-button" title="concept-button">button</a>.</p><p>The <dfn id="attr-button-type" title="attr-button-type"><code>type</code></dfn>
348: attribute controls the behavior of the button when it is activated.
349: It is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following table
350: lists the keywords and states for the attribute — the keywords
351: in the left column map to the states in the cell in the second
352: column on the same row as the keyword.</p><table><thead><tr><th> Keyword
353: </th><th> State
354: </th><th> Brief description
355: </th></tr></thead><tbody><tr><td><dfn id="attr-button-type-submit" title="attr-button-type-submit"><code>submit</code></dfn>
356: </td><td><a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
357: </td><td>Submits the form.
358: </td></tr><tr><td><dfn id="attr-button-type-reset" title="attr-button-type-reset"><code>reset</code></dfn>
359: </td><td><a href="#attr-button-type-reset-state" title="attr-button-type-reset-state">Reset Button</a>
360: </td><td>Resets the form.
361: </td></tr><tr><td><dfn id="attr-button-type-button" title="attr-button-type-button"><code>button</code></dfn>
362: </td><td><a href="#attr-button-type-button-state" title="attr-button-type-button-state">Button</a>
363: </td><td>Does nothing.
364: </td></tr></tbody></table><p>The <i>missing value default</i> is the <a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
365: state.</p><p>If the <code title="attr-button-type"><a href="#attr-button-type">type</a></code> attribute is in
366: the <a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
367: state, the element is specifically a <a href="forms.html#concept-submit-button" title="concept-submit-button">submit button</a>.</p><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
368: explicitly associate the <code><a href="#the-button-element">button</a></code> element with its
369: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
370: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
371: the control non-interactive and to prevent its value from being
372: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
373: attribute controls focus. The <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>, <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>, <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>, <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>, and <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code> attributes are
374: <a href="association-of-controls-and-forms.html#attributes-for-form-submission">attributes for form submission</a>.</p><p class="note">The <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code> attribute can
375: be used to make submit buttons that do not trigger the constraint
1.15 mike 376: validation.</p><p>The <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>, <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>, <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>, <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>, and <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code> must not be specified
377: if the element's <code title="attr-button-type"><a href="#attr-button-type">type</a></code>
378: attribute is not in the <a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
379: state.</p><p>The <dfn id="attr-button-value" title="attr-button-value"><code>value</code></dfn>
1.9 mike 380: attribute gives the element's value for the purposes of form
1.10 mike 381: submission. The element's <a href="#concept-fe-value" title="concept-fe-value">value</a> is the value of the element's
382: <code title="attr-button-value"><a href="#attr-button-value">value</a></code> attribute, if there is
383: one, or the empty string otherwise.</p><p class="note">A button (and its value) is only included in the
1.9 mike 384: form submission if the button itself was used to initiate the form
385: submission.</p><div class="example">
386:
387: <p>The following button is labeled "Show hint" and pops up a dialog
388: box when activated:</p>
389:
390: <pre><button type=button
391: onclick="alert('This 15-20 minute piece was composed by George Gershwin.')">
392: Show hint
393: </button></pre>
394:
1.30 mike 395: </div><h4 id="the-select-element"><span class="secno">4.10.9 </span>The <dfn><code>select</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
1.9 mike 396: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
397: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
398: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
399: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</a>, <a href="forms.html#category-submit" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" title="category-reset">resettable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
400: <dt>Contexts in which this element may be used:</dt>
401: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
402: <dt>Content model:</dt>
403: <dd>Zero or more <code><a href="#the-option-element">option</a></code> or <code><a href="#the-optgroup-element">optgroup</a></code> elements.</dd>
404: <dt>Content attributes:</dt>
405: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
406: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
407: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
408: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
409: <dd><code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code></dd>
410: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
411: <dd><code title="attr-select-size"><a href="#attr-select-size">size</a></code></dd>
412: <dt>DOM interface:</dt>
413: <dd>
414: <pre class="idl">interface <dfn id="htmlselectelement">HTMLSelectElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
415: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
416: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
417: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
418: attribute boolean <a href="#dom-select-multiple" title="dom-select-multiple">multiple</a>;
419: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
420: attribute unsigned long <a href="#dom-select-size" title="dom-select-size">size</a>;
421:
422: readonly attribute DOMString <a href="#dom-select-type" title="dom-select-type">type</a>;
423:
424: readonly attribute <a href="urls.html#htmloptionscollection">HTMLOptionsCollection</a> <a href="#dom-select-options" title="dom-select-options">options</a>;
425: attribute unsigned long <a href="#dom-select-length" title="dom-select-length">length</a>;
426: caller getter any <a href="#dom-select-item" title="dom-select-item">item</a>(in unsigned long index);
427: caller getter any <a href="#dom-select-nameditem" title="dom-select-namedItem">namedItem</a>(in DOMString name);
428: void <a href="#dom-select-add" title="dom-select-add">add</a>(in <a href="elements.html#htmlelement">HTMLElement</a> element, in optional <a href="elements.html#htmlelement">HTMLElement</a> before);
429: void <a href="#dom-select-add" title="dom-select-add">add</a>(in <a href="elements.html#htmlelement">HTMLElement</a> element, in long before);
430: void <a href="#dom-select-remove" title="dom-select-remove">remove</a>(in long index);
431:
432: readonly attribute <a href="urls.html#htmlcollection">HTMLCollection</a> <a href="#dom-select-selectedoptions" title="dom-select-selectedOptions">selectedOptions</a>;
433: attribute long <a href="#dom-select-selectedindex" title="dom-select-selectedIndex">selectedIndex</a>;
434: attribute DOMString <a href="#dom-select-value" title="dom-select-value">value</a>;
435:
436: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
437: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
438: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
439: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
440: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
441:
1.19 mike 442: readonly attribute <a href="#nodelist">NodeList</a> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
1.9 mike 443: };</pre>
444: </dd>
445: </dl><!-- Proposals for v2:
446: * <select value=""> as an alternative to <option selected>
447: http://developers.slashdot.org/comments.pl?sid=426306&cid=22142072
1.11 mike 448: <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 449: src="/js/flightcity.js"></SCRIPT></select> which is the kind of thing that could be much simpler with <select value="PEK">
450: * a way to make the <select> not have a default value at all (ack
451: or to have a "placeholer" like value that doesn't count as a value being selected but shows a prompt until a value is selected
452: * once we can have no default, a way to require="" a value.
453: ack Weston Ruter: http://weston.ruter.net/projects/test-cases/html-select-element/
454: q.v. http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2008-November/017583.html
455: --><p>The <code><a href="#the-select-element">select</a></code> element represents a control for
456: selecting amongst a set of options.</p><p>The <dfn id="attr-select-multiple" title="attr-select-multiple"><code>multiple</code></dfn>
457: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. If the attribute is
458: present, then the <code><a href="#the-select-element">select</a></code> element
459: <a href="#represents">represents</a> a control for selecting zero or more options
460: from the <a href="#concept-select-option-list" title="concept-select-option-list">list of
461: options</a>. If the attribute is absent, then the
462: <code><a href="#the-select-element">select</a></code> element <a href="#represents">represents</a> a control for
463: selecting a single option from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p><p>The <dfn id="concept-select-option-list" title="concept-select-option-list">list of options</dfn>
464: for a <code><a href="#the-select-element">select</a></code> element consists of all the
465: <code><a href="#the-option-element">option</a></code> element children of the <code><a href="#the-select-element">select</a></code>
466: element, and all the <code><a href="#the-option-element">option</a></code> element children of all the
467: <code><a href="#the-optgroup-element">optgroup</a></code> element children of the <code><a href="#the-select-element">select</a></code>
468: element, in <a href="infrastructure.html#tree-order">tree order</a>.</p><p>The <dfn id="attr-select-size" title="attr-select-size"><code>size</code></dfn>
469: 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">size</a></code> attribute, if specified, must
470: have a value that is a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a>
471: greater than zero. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is present,
472: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
473: default value is 4. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is absent,
474: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
475: default value is 1.</p><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
476: explicitly associate the <code><a href="#the-select-element">select</a></code> element with its
477: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
478: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
479: the control non-interactive and to prevent its value from being
480: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
481: attribute controls focus.</p><dl class="domintro"><dt><var title="">select</var> . <code title="dom-select-type"><a href="#dom-select-type">type</a></code></dt>
482:
483: <dd>
484:
485: <p>Returns "<code title="">select-multiple</code>" if the element
486: has a <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
487: attribute, and "<code title="">select-one</code>"
488: otherwise.</p>
489:
490: </dd>
491:
492: <dt><var title="">select</var> . <code title="dom-select-options"><a href="#dom-select-options">options</a></code></dt>
493:
494: <dd>
495:
496: <p>Returns an <code><a href="urls.html#htmloptionscollection">HTMLOptionsCollection</a></code> of the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
497:
498: </dd>
499:
500: <dt><var title="">select</var> . <code title="dom-select-length"><a href="#dom-select-length">length</a></code> [ = <var title="">value</var> ]</dt>
501: <dd>
502: <p>Returns the number of elements in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
503: <p>When set to a smaller number, truncates the number of <code><a href="#the-option-element">option</a></code> elements in the <code><a href="#the-select-element">select</a></code>.</p>
504: <p>When set to a greater number, adds new blank <code><a href="#the-option-element">option</a></code> elements to the <code><a href="#the-select-element">select</a></code>.</p>
505: </dd>
506:
507: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a href="#dom-select-item">item</a></code>(<var title="">index</var>)</dt>
508: <dt><var title="">select</var>[<var title="">index</var>]</dt>
509: <dt><var title="">select</var>(<var title="">index</var>)</dt>
510: <dd>
511: <p>Returns the item with index <var title="">index</var> from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>. The items are sorted in <a href="infrastructure.html#tree-order">tree order</a>.</p>
512: <p>Returns null if <var title="">index</var> is out of range.</p>
513: </dd>
514:
515: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a href="#dom-select-item">namedItem</a></code>(<var title="">name</var>)</dt>
516: <dt><var title="">select</var>[<var title="">name</var>]</dt>
517: <dt><var title="">select</var>(<var title="">name</var>)</dt>
518: <dd>
1.28 mike 519: <p>Returns the item with ID or <code title="attr-option-name"><a href="obsolete.html#attr-option-name">name</a></code> <var title="">name</var> from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
1.19 mike 520: <p>If there are multiple matching items, then a <code><a href="#nodelist">NodeList</a></code> object containing all those elements is returned.</p>
1.9 mike 521: <p>Returns null if no element with that ID could be found.</p>
522: </dd>
523:
524: <dt><var title="">select</var> . <code title="dom-select-add"><a href="#dom-select-add">add</a></code>(<var title="">element</var> [, <var title="">before</var> ])</dt>
525: <dd>
526: <p>Inserts <var title="">element</var> before the node given by <var title="">before</var>.</p>
527: <p>The <var title="">before</var> argument can be a number, in
528: which case <var title="">element</var> is inserted before the item
529: with that number, or an element from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>, in
530: which case <var title="">element</var> is inserted before that
531: element.</p>
532: <p>If <var title="">before</var> is omitted, null, or a number out
533: of range, then <var title="">element</var> will be added at the
534: end of the list.</p>
535: <p>This method will throw a <code><a href="urls.html#hierarchy_request_err">HIERARCHY_REQUEST_ERR</a></code>
536: exception if <var title="">element</var> is an ancestor of the
537: element into which it is to be inserted. If <var title="">element</var> is not an <code><a href="#the-option-element">option</a></code> or
538: <code><a href="#the-optgroup-element">optgroup</a></code> element, then the method does nothing.</p>
539: </dd>
540:
541: <dt><var title="">select</var> . <code title="dom-select-selectedOptions"><a href="#dom-select-selectedoptions">selectedOptions</a></code></dt>
542:
543: <dd>
544:
545: <p>Returns an <code><a href="urls.html#htmlcollection">HTMLCollection</a></code> of the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> that are
546: selected.</p>
547:
548: </dd>
549:
550: <dt><var title="">select</var> . <code title="dom-select-selectedIndex"><a href="#dom-select-selectedindex">selectedIndex</a></code> [ = <var title="">value</var> ]</dt>
551:
552: <dd>
553:
554: <p>Returns the index of the first selected item, if any, or
555: −1 if there is no selected item.</p>
556:
557: <p>Can be set, to change the selection.</p>
558:
559: </dd>
560:
561: <dt><var title="">select</var> . <code title="dom-select-value"><a href="#dom-select-value">value</a></code> [ = <var title="">value</var> ]</dt>
562:
563: <dd>
564:
565: <p>Returns the <a href="#concept-fe-value" title="concept-fe-value">value</a> of the
566: first selected item, if any, or the empty string if there is no
567: selected item.</p>
568:
569: <p>Can be set, to change the selection.</p>
570:
571: </dd>
572:
573: </dl><div class="example">
574:
575: <p>The following example shows how a <code><a href="#the-select-element">select</a></code> element
576: can be used to offer the user with a set of options from which the
577: user can select a single option. The default option is
578: preselected.</p>
579:
580: <pre><p>
581: <label for="unittype">Select unit type:</label>
582: <select id="unittype" name="unittype">
583: <option value="1"> Miner </option>
584: <option value="2"> Puffer </option>
585: <option value="3" selected> Snipey </option>
586: <option value="4"> Max </option>
587: <option value="5"> Firebot </option>
588: </select>
589: </p></pre>
590:
591: </div><div class="example">
592:
593: <p>Here, the user is offered a set of options from which he can
594: select any number. By default, all five options are selected.</p>
595:
596: <pre><p>
597: <label for="allowedunits">Select unit types to enable on this map:</label>
598: <select id="allowedunits" name="allowedunits" multiple>
599: <option value="1" selected> Miner </option>
600: <option value="2" selected> Puffer </option>
601: <option value="3" selected> Snipey </option>
602: <option value="4" selected> Max </option>
603: <option value="5" selected> Firebot </option>
604: </select>
605: </p></pre>
606:
1.30 mike 607: </div><h4 id="the-datalist-element"><span class="secno">4.10.10 </span>The <dfn><code>datalist</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
1.9 mike 608: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
609: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
610: <dt>Contexts in which this element may be used:</dt>
611: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
612: <dt>Content model:</dt>
613: <dd>Either: <a href="content-models.html#phrasing-content">phrasing content</a>.</dd>
614: <dd>Or: Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
615: <dt>Content attributes:</dt>
616: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
617: <dt>DOM interface:</dt>
618: <dd>
619: <pre class="idl">interface <dfn id="htmldatalistelement">HTMLDataListElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
620: readonly attribute <a href="urls.html#htmlcollection">HTMLCollection</a> <a href="#dom-datalist-options" title="dom-datalist-options">options</a>;
621: };</pre>
622: </dd>
623: </dl><p>The <code><a href="#the-datalist-element">datalist</a></code> element represents a set of
624: <code><a href="#the-option-element">option</a></code> elements that represent predefined options for
625: other controls. The contents of the element represents fallback
626: content for legacy user agents, intermixed with <code><a href="#the-option-element">option</a></code>
627: elements that represent the predefined options. In the rendering,
628: the <code><a href="#the-datalist-element">datalist</a></code> element <a href="#represents">represents</a>
629: nothing.</p><p>The <code><a href="#the-datalist-element">datalist</a></code> element is hooked up to an
630: <code><a href="the-input-element.html#the-input-element">input</a></code> element using the <code title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code> attribute on the
631: <code><a href="the-input-element.html#the-input-element">input</a></code> element. <!-- v2DATAGRID The
632: <code>datalist</code> element can also be used with a
633: <code>datagrid</code> element, as the source of autocompletion hints
634: for <code title="datagrid-type-editable">editable</code>
635: cells. --></p><p>Each <code><a href="#the-option-element">option</a></code> element that is a descendant of the
636: <code><a href="#the-datalist-element">datalist</a></code> element, that is not <a href="#concept-option-disabled" title="concept-option-disabled">disabled</a>, and whose <a href="#concept-option-value" title="concept-option-value">value</a> is a string that isn't the
637: empty string, represents a suggestion. Each suggestion has a <a href="#concept-option-value" title="concept-option-value">value</a> and a <a href="#concept-option-label" title="concept-option-label">label</a>.
638:
639: </p><dl class="domintro"><dt><var title="">datalist</var> . <code title="dom-datalist-options"><a href="#dom-datalist-options">options</a></code></dt>
640:
641: <dd>
642: <p>Returns an <code><a href="urls.html#htmlcollection">HTMLCollection</a></code> of the <code>options</code> elements of the table.</p>
643: </dd>
644:
1.30 mike 645: </dl><h4 id="the-optgroup-element"><span class="secno">4.10.11 </span>The <dfn><code>optgroup</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
1.9 mike 646: <dd>None.</dd>
647: <dt>Contexts in which this element may be used:</dt>
648: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
649: <dt>Content model:</dt>
650: <dd>Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
651: <dt>Content attributes:</dt>
652: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
653: <dd><code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled">disabled</a></code></dd>
654: <dd><code title="attr-optgroup-label"><a href="#attr-optgroup-label">label</a></code></dd>
655: <dt>DOM interface:</dt>
656: <dd>
657: <pre class="idl">interface <dfn id="htmloptgroupelement">HTMLOptGroupElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
658: attribute boolean <a href="#dom-optgroup-disabled" title="dom-optgroup-disabled">disabled</a>;
659: attribute DOMString <a href="#dom-optgroup-label" title="dom-optgroup-label">label</a>;
660: };</pre>
661: </dd>
662: </dl><!-- v2: make optgroups selectable if they have a value. --><p>The <code><a href="#the-optgroup-element">optgroup</a></code> element <a href="#represents">represents</a> a group of
663: <code><a href="#the-option-element">option</a></code> elements with a common label.</p><p>The element's group of <code><a href="#the-option-element">option</a></code> elements consists of
664: the <code><a href="#the-option-element">option</a></code> elements that are children of the
665: <code><a href="#the-optgroup-element">optgroup</a></code> element.</p><p>The <dfn id="attr-optgroup-disabled" title="attr-optgroup-disabled"><code>disabled</code></dfn> attribute
666: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a> and can be used to <a href="#concept-option-disabled" title="concept-option-disabled">disable</a> a group of
667: <code><a href="#the-option-element">option</a></code> elements together.</p><p>The <dfn id="attr-optgroup-label" title="attr-optgroup-label"><code>label</code></dfn>
668: attribute must be specified. Its value gives the name of the group,
669: for the purposes of the user interface. </p><div class="example">
670:
671: <p>The following snippet shows how a set of lessons from three
672: courses could be offered in a <code><a href="#the-select-element">select</a></code> drop-down
673: widget:</p>
674:
675: <pre><form action="courseselector.dll" method="get">
676: <p>Which course would you like to watch today?
677: <p><label>Course:
678: <select name="c">
679: <optgroup label="8.01 Physics I: Classical Mechanics">
680: <option value="8.01.1">Lecture 01: Powers of Ten
681: <option value="8.01.2">Lecture 02: 1D Kinematics
682: <option value="8.01.3">Lecture 03: Vectors
683: <optgroup label="8.02 Electricity and Magnestism">
684: <option value="8.02.1">Lecture 01: What holds our world together?
685: <option value="8.02.2">Lecture 02: Electric Field
686: <option value="8.02.3">Lecture 03: Electric Flux
687: <optgroup label="8.03 Physics III: Vibrations and Waves">
688: <option value="8.03.1">Lecture 01: Periodic Phenomenon
689: <option value="8.03.2">Lecture 02: Beats
690: <option value="8.03.3">Lecture 03: Forced Oscillations with Damping
691: </select>
692: </label>
693: <p><input type=submit value="▶ Play">
694: </form></pre>
695:
1.30 mike 696: </div><h4 id="the-option-element"><span class="secno">4.10.12 </span>The <dfn><code>option</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
1.9 mike 697: <dd>None.</dd>
698: <dt>Contexts in which this element may be used:</dt>
699: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
700: <dd>As a child of a <code><a href="#the-datalist-element">datalist</a></code> element.</dd>
701: <dd>As a child of an <code><a href="#the-optgroup-element">optgroup</a></code> element.</dd>
702: <dt>Content model:</dt>
703: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
704: <dt>Content attributes:</dt>
705: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
706: <dd><code title="attr-option-disabled"><a href="#attr-option-disabled">disabled</a></code></dd>
707: <dd><code title="attr-option-label"><a href="#attr-option-label">label</a></code></dd>
708: <dd><code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code></dd>
709: <dd><code title="attr-option-value"><a href="#attr-option-value">value</a></code></dd>
710: <dt>DOM interface:</dt>
711: <dd>
712: <pre class="idl">[NamedConstructor=<a href="#dom-option" title="dom-option">Option</a>(),
713: NamedConstructor=<a href="#dom-option-t" title="dom-option-t">Option</a>(in DOMString text),
714: NamedConstructor=<a href="#dom-option-tv" title="dom-option-tv">Option</a>(in DOMString text, in DOMString value),
715: NamedConstructor=<a href="#dom-option-tvd" title="dom-option-tvd">Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected),
716: NamedConstructor=<a href="#dom-option-tvds" title="dom-option-tvds">Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected, in boolean selected)]
717: interface <dfn id="htmloptionelement">HTMLOptionElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
718: attribute boolean <a href="#dom-option-disabled" title="dom-option-disabled">disabled</a>;
719: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-option-form" title="dom-option-form">form</a>;
720: attribute DOMString <a href="#dom-option-label" title="dom-option-label">label</a>;
721: attribute boolean <a href="#dom-option-defaultselected" title="dom-option-defaultSelected">defaultSelected</a>;
722: attribute boolean <a href="#dom-option-selected" title="dom-option-selected">selected</a>;
723: attribute DOMString <a href="#dom-option-value" title="dom-option-value">value</a>;
724:
725: attribute DOMString <a href="#dom-option-text" title="dom-option-text">text</a>;
726: readonly attribute long <a href="#dom-option-index" title="dom-option-index">index</a>;
727: };</pre>
728: </dd>
729: </dl><p>The <code><a href="#the-option-element">option</a></code> element <a href="#represents">represents</a> an option
730: in a <code><a href="#the-select-element">select</a></code> element or as part of a list of suggestions
731: in a <code><a href="#the-datalist-element">datalist</a></code> element.</p><p>The <dfn id="attr-option-disabled" title="attr-option-disabled"><code>disabled</code></dfn>
732: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. An
733: <code><a href="#the-option-element">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">disabled</a></code> attribute is present or
734: if it is a child of an <code><a href="#the-optgroup-element">optgroup</a></code> element whose <code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled">disabled</a></code> attribute is
735: present.</p><p>The <dfn id="attr-option-label" title="attr-option-label"><code>label</code></dfn>
736: 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">option</a></code>
737: element is the value of the <code title="attr-option-label"><a href="#attr-option-label">label</a></code> attribute, if there is one,
1.19 mike 738: or the <code><a href="#textcontent">textContent</a></code> of the element, if there isn't.</p><p>The <dfn id="attr-option-value" title="attr-option-value"><code>value</code></dfn>
1.9 mike 739: 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">option</a></code>
740: element is the value of the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute, if there is one,
1.19 mike 741: or the <code><a href="#textcontent">textContent</a></code> of the element, if there isn't.</p><p>The <dfn id="attr-option-selected" title="attr-option-selected"><code>selected</code></dfn>
1.9 mike 742: attribute represents the default <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of the
1.33 mike 743: element.</p><p>A <code><a href="#the-select-element">select</a></code> element whose <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is not
744: specified must not have more than one descendant <code><a href="#the-option-element">option</a></code>
745: element with its <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code>
746: attribute set.</p><dl class="domintro"><dt><var title="">option</var> . <code title="dom-option-selected"><a href="#dom-option-selected">selected</a></code></dt>
1.9 mike 747:
748: <dd>
749:
750: <p>Returns true if the element is selected, and false otherwise.</p>
751:
752: </dd>
753:
754: <dt><var title="">option</var> . <code title="dom-option-index"><a href="#dom-option-index">index</a></code></dt>
755:
756: <dd>
757:
758: <p>Returns the index of the element in its <code><a href="#the-select-element">select</a></code>
759: element's <code title="dom-select-options"><a href="#dom-select-options">options</a></code>
760: list.</p>
761:
762: </dd>
763:
764: <dt><var title="">option</var> . <code title="dom-option-form"><a href="#dom-option-form">form</a></code></dt>
765:
766: <dd>
767:
768: <p>Returns the element's <code><a href="forms.html#the-form-element">form</a></code> element, if any, or
769: null otherwise.</p>
770:
771: </dd>
772:
1.11 mike 773: <dt><var title="">option</var> . <code title="dom-option-text"><a href="#dom-option-text">text</a></code></dt>
774:
775: <dd>
776:
1.19 mike 777: <p>Same as <code><a href="#textcontent">textContent</a></code>.</p>
1.11 mike 778:
779: </dd>
780:
1.9 mike 781: <dt><var title="">option</var> = new <code title="dom-option"><a href="#dom-option">Option</a></code>( [ <var title="">text</var> [, <var title="">value</var> [, <var title="">defaultSelected</var> [, <var title="">selected</var> ] ] ] ] )</dt>
782:
783: <dd>
784:
785: <p>Returns a new <code><a href="#the-option-element">option</a></code> element.</p>
786:
787: <p>The <var title="">text</var> argument sets the contents of the element.</p>
788: <p>The <var title="">value</var> argument sets the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute.</p>
789: <p>The <var title="">defaultSelected</var> argument sets the <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute.</p>
790: <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>
791:
792: </dd>
793:
1.30 mike 794: </dl><h4 id="the-textarea-element"><span class="secno">4.10.13 </span>The <dfn><code>textarea</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
1.9 mike 795: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
796: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
797: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
798: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</a>, <a href="forms.html#category-submit" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" title="category-reset">resettable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
799: <dt>Contexts in which this element may be used:</dt>
800: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
801: <dt>Content model:</dt>
802: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
803: <dt>Content attributes:</dt>
804: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
805: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
806: <dd><code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code></dd>
807: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
808: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
809: <dd><code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength">maxlength</a></code></dd>
810: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
811: <dd><code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code></dd>
812: <dd><code title="attr-textarea-readonly"><a href="#attr-textarea-readonly">readonly</a></code></dd>
813: <dd><code title="attr-textarea-required"><a href="#attr-textarea-required">required</a></code></dd>
814: <dd><code title="attr-textarea-rows"><a href="#attr-textarea-rows">rows</a></code></dd>
815: <dd><code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code></dd>
816: <dt>DOM interface:</dt>
817: <dd>
818: <pre class="idl">interface <dfn id="htmltextareaelement">HTMLTextAreaElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
819: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
820: attribute unsigned long <a href="#dom-textarea-cols" title="dom-textarea-cols">cols</a>;
821: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
822: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
823: attribute long <a href="#dom-textarea-maxlength" title="dom-textarea-maxLength">maxLength</a>;
824: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
825: attribute DOMString <a href="#dom-textarea-placeholder" title="dom-textarea-placeholder">placeholder</a>;
826: attribute boolean <a href="#dom-textarea-readonly" title="dom-textarea-readOnly">readOnly</a>;
827: attribute boolean <a href="#dom-textarea-required" title="dom-textarea-required">required</a>;
828: attribute unsigned long <a href="#dom-textarea-rows" title="dom-textarea-rows">rows</a>;
829: attribute DOMString <a href="#dom-textarea-wrap" title="dom-textarea-wrap">wrap</a>;
830:
831: readonly attribute DOMString <a href="#dom-textarea-type" title="dom-textarea-type">type</a>;
832: attribute DOMString <a href="#dom-textarea-defaultvalue" title="dom-textarea-defaultValue">defaultValue</a>;
833: attribute DOMString <a href="#dom-textarea-value" title="dom-textarea-value">value</a>;
834: readonly attribute unsigned long <a href="#dom-textarea-textlength" title="dom-textarea-textLength">textLength</a>;
835:
836: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
837: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
838: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
839: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
840: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
841:
1.19 mike 842: readonly attribute <a href="#nodelist">NodeList</a> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
1.9 mike 843:
844: void <a href="#dom-textarea-input-select" title="dom-textarea/input-select">select</a>();
845: attribute unsigned long <a href="#dom-textarea-input-selectionstart" title="dom-textarea/input-selectionStart">selectionStart</a>;
846: attribute unsigned long <a href="#dom-textarea-input-selectionend" title="dom-textarea/input-selectionEnd">selectionEnd</a>;
847: void <a href="#dom-textarea-input-setselectionrange" title="dom-textarea/input-setSelectionRange">setSelectionRange</a>(in unsigned long start, in unsigned long end);
848: };</pre>
849: </dd>
850: </dl><p>The <code><a href="#the-textarea-element">textarea</a></code> element <a href="#represents">represents</a> a
851: multiline plain text edit control. The contents of the control represent the
852: control's default value.</p><p>The <dfn id="attr-textarea-readonly" title="attr-textarea-readonly"><code>readonly</code></dfn> attribute
853: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a> used to control whether the text
854: can be edited by the user or not.</p><p>The <dfn id="attr-textarea-cols" title="attr-textarea-cols"><code>cols</code></dfn>
855: attribute specifies the expected maximum number of characters per
856: line. If the <code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code> attribute
857: is specified, its value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative
858: integer</a> greater than zero. </p><p>The <dfn id="attr-textarea-rows" title="attr-textarea-rows"><code>rows</code></dfn>
859: attribute specifies the number of lines to show. If the <code title="attr-textarea-rows"><a href="#attr-textarea-rows">rows</a></code> attribute is specified, its
860: value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a> greater than
861: zero. </p><p>The <dfn id="attr-textarea-wrap" title="attr-textarea-wrap"><code>wrap</code></dfn>
862: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a> with two keywords
863: and states: the <dfn id="attr-textarea-wrap-soft" title="attr-textarea-wrap-soft"><code>soft</code></dfn> keyword
864: which maps to the <dfn id="attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</dfn> state, and the
865: <dfn id="attr-textarea-wrap-hard" title="attr-textarea-wrap-hard"><code>hard</code></dfn> keyword
866: which maps to the <dfn id="attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</dfn> state. The
867: <i>missing value default</i> is the <a href="#attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</a> state.</p><p>If the element's <code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code>
868: attribute is in the <a href="#attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</a> state, the <code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code> attribute must be
869: specified.</p><!-- attr-textarea-wrap-off (attr-textarea-wrap-off-state): not
870: conforming; turns off the rendering of wrapping but otherwise acts
871: like 'soft' --><p>The <dfn id="attr-textarea-maxlength" title="attr-textarea-maxlength"><code>maxlength</code></dfn>
872: attribute is a <a href="association-of-controls-and-forms.html#attr-fe-maxlength" title="attr-fe-maxlength">form control <code title="">maxlength</code> attribute</a> controlled by the
873: <code><a href="#the-textarea-element">textarea</a></code> element's <a href="#concept-textarea-dirty" title="concept-textarea-dirty">dirty value flag</a>.</p><p>If the <code><a href="#the-textarea-element">textarea</a></code> element has a <a href="association-of-controls-and-forms.html#maximum-allowed-value-length">maximum allowed
874: value length</a>, then the element's children must be such that
875: the <a href="#code-point-length">code-point length</a> of the value of the element's
1.19 mike 876: <code><a href="#textcontent">textContent</a></code> IDL attribute is equal to or less than the
1.9 mike 877: element's <a href="association-of-controls-and-forms.html#maximum-allowed-value-length">maximum allowed value length</a>.</p><p>The <dfn id="attr-textarea-required" title="attr-textarea-required"><code>required</code></dfn> attribute
878: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. When specified, the user will
879: 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>
880: attribute represents a hint (a word or short phrase) intended to aid
881: the user with data entry. A hint could be a sample value or a brief
882: description of the expected format. The attribute, if specified,
883: must have a value that contains no U+000A LINE FEED (LF) or U+000D
884: CARRIAGE RETURN (CR) characters.</p><p class="note">For a longer hint or other advisory text, the <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute is more appropriate.</p><p>The <code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code>
885: attribute should not be used as an alternative to a
886: <code><a href="forms.html#the-label-element">label</a></code>.</p><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
887: explicitly associate the <code><a href="#the-textarea-element">textarea</a></code> element with its
888: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
889: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
890: the control non-interactive and to prevent its value from being
891: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
892: attribute controls focus.</p><dl class="domintro"><dt><var title="">textarea</var> . <code title="attr-textarea-type">type</code></dt>
893:
894: <dd>
895:
896: <p>Returns the string "<code title="">textarea</code>".</p>
897:
898: </dd>
899:
900: <dt><var title="">textarea</var> . <code title="attr-textarea-value">value</code></dt>
901:
902: <dd>
903:
904: <p>Returns the current value of the element.</p>
905:
906: <p>Can be set, to change the value.</p>
907:
908: </dd>
909:
910: </dl><div class="example">
911:
912: <p>Here is an example of a <code><a href="#the-textarea-element">textarea</a></code> being used for
913: unrestricted free-form text input in a form:</p>
914:
915: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments></textarea></p></pre>
916:
1.30 mike 917: </div><h4 id="the-keygen-element"><span class="secno">4.10.14 </span>The <dfn><code>keygen</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
1.9 mike 918: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
919: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
920: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
921: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</a>, <a href="forms.html#category-submit" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" title="category-reset">resettable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
922: <dt>Contexts in which this element may be used:</dt>
923: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
924: <dt>Content model:</dt>
925: <dd>Empty.</dd>
926: <dt>Content attributes:</dt>
927: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
928: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
929: <dd><code title="attr-keygen-challenge"><a href="#attr-keygen-challenge">challenge</a></code></dd>
930: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
931: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
932: <dd><code title="attr-keygen-keytype"><a href="#attr-keygen-keytype">keytype</a></code></dd>
933: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
934: <dt>DOM interface:</dt>
935: <dd>
936: <pre class="idl">interface <dfn id="htmlkeygenelement">HTMLKeygenElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
937: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
938: attribute DOMString <a href="#dom-keygen-challenge" title="dom-keygen-challenge">challenge</a>;
939: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
940: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
941: attribute DOMString <a href="#dom-keygen-keytype" title="dom-keygen-keytype">keytype</a>;
942: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
943:
944: readonly attribute DOMString <a href="#dom-keygen-type" title="dom-keygen-type">type</a>;
945:
946: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
947: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
948: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
949: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
950: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
951:
1.19 mike 952: readonly attribute <a href="#nodelist">NodeList</a> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
1.9 mike 953: };</pre>
954: </dd>
955: </dl><p>The <code><a href="#the-keygen-element">keygen</a></code> element <a href="#represents">represents</a> a key
956: pair generator control. When the control's form is submitted, the
957: private key is stored in the local keystore, and the public key is
958: packaged and sent to the server.</p><p>The <dfn id="attr-keygen-challenge" title="attr-keygen-challenge"><code>challenge</code></dfn> attribute
959: may be specified. Its value will be packaged with the submitted
960: key.</p><p>The <dfn id="attr-keygen-keytype" title="attr-keygen-keytype"><code>keytype</code></dfn>
961: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following
962: table lists the keywords and states for the attribute — the
963: keywords in the left column map to the states listed in the cell in
964: the second column on the same row as the keyword. User agents are
1.26 mike 965: not required to support these values, and must only recognize values
1.9 mike 966: whose corresponding algorithms they support.</p><table><thead><tr><th> Keyword </th><th> State
967: </th></tr></thead><tbody><tr><td> <code title="">rsa</code>
968: </td><td> <i title="">RSA</i>
969: <!-- v2 (see below)
970: <tr>
971: <td> <code title="">ec</code>
972: <td> <i title="">EC</i>
973: -->
974: </td></tr></tbody></table><p>The <i>invalid value default</i> state is the <i title="">unknown</i> state. The <i>missing value default</i> state
975: is the <i title="">RSA</i> state, if it is supported, or the <i title="">unknown</i> state otherwise.</p><p class="note">This specification does not specify what key types
976: user agents are to support — it is possible for a user agent
977: to not support any key types at all.</p><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
978: explicitly associate the <code><a href="#the-keygen-element">keygen</a></code> element with its
979: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
980: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
981: the control non-interactive and to prevent its value from being
982: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
983: attribute controls focus.</p><dl class="domintro"><dt><var title="">keygen</var> . <code title="attr-keygen-type">type</code></dt>
984:
985: <dd>
986:
987: <p>Returns the string "<code title="">keygen</code>".</p>
988:
989: </dd>
990:
991: </dl><p class="note">This specification does not specify how the private
992: key generated is to be used. It is expected that after receiving the
993: <code><a href="#signedpublickeyandchallenge">SignedPublicKeyAndChallenge</a></code> (SPKAC) structure, the
994: server will generate a client certificate and offer it back to the
995: user for download; this certificate, once downloaded and stored in
996: the key store along with the private key, can then be used to
997: authenticate to services that use SSL and certificate
998: authentication.</p><!-- how does the UA know which private key is associated with a
999: certificate it gets back after the server has taken the public key
1000: created by <keygen> and turned it into a client cert? --><div class="example">
1001:
1002: <p>To generate a key pair, add the private key to the user's key
1003: store, and submit the public key to the server, markup such as the
1004: following can be used:</p>
1005:
1.22 mike 1006: <pre><form action="processkey.cgi" method="post" enctype="multipart/form-data">
1.9 mike 1007: <p><keygen name="key"></p>
1008: <p><input type=submit value="Submit key..."></p>
1009: </form></pre>
1010:
1011: <p>The server will then receive a form submission with a packaged
1012: RSA public key as the value of "<code title="">key</code>". This
1013: can then be used for various purposes, such as generating a client
1014: certificate, as mentioned above.</p>
1015:
1.30 mike 1016: </div><h4 id="the-output-element"><span class="secno">4.10.15 </span>The <dfn><code>output</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
1.9 mike 1017: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1018: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1.11 mike 1019: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</a>, and <a href="forms.html#category-reset" title="category-reset">resettable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
1.9 mike 1020: <dt>Contexts in which this element may be used:</dt>
1021: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1022: <dt>Content model:</dt>
1023: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1024: <dt>Content attributes:</dt>
1025: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1026: <dd><code title="attr-output-for"><a href="#attr-output-for">for</a></code></dd>
1027: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1028: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
1029: <dt>DOM interface:</dt>
1030: <dd>
1031: <pre class="idl">interface <dfn id="htmloutputelement">HTMLOutputElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.12 mike 1032: [PutForwards=<a href="#dom-domsettabletokenlist-value" title="dom-DOMSettableTokenList-value">value</a>] readonly attribute <a href="urls.html#domsettabletokenlist">DOMSettableTokenList</a> <span title="dom-output-wrap">htmlFor</span>;
1.9 mike 1033: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
1034: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
1035:
1036: readonly attribute DOMString <a href="#dom-output-type" title="dom-output-type">type</a>;
1037: attribute DOMString <a href="#dom-output-defaultvalue" title="dom-output-defaultValue">defaultValue</a>;
1038: attribute DOMString <a href="#dom-output-value" title="dom-output-value">value</a>;
1039:
1040: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
1041: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
1042: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
1043: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
1044: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
1.11 mike 1045:
1.19 mike 1046: readonly attribute <a href="#nodelist">NodeList</a> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
1.9 mike 1047: };</pre>
1048: </dd>
1049: </dl><p>The <code><a href="#the-output-element">output</a></code> element <a href="#represents">represents</a> the result of a
1050: calculation.</p><p>The <dfn id="attr-output-for" title="attr-output-for"><code>for</code></dfn> content
1051: attribute allows an explicit relationship to be made between the
1052: result of a calculation and the elements that represent the values
1053: that went into the calculation or that otherwise influenced the
1054: calculation. The <code title="attr-output-for"><a href="#attr-output-for">for</a></code> attribute,
1055: if specified, must contain a string consisting of an <a href="common-microsyntaxes.html#unordered-set-of-unique-space-separated-tokens">unordered
1056: set of unique space-separated tokens</a>, each of which must have
1057: the value of an ID of an element in the same
1.19 mike 1058: <code><a href="#document">Document</a></code>.</p><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
1.9 mike 1059: explicitly associate the <code><a href="#the-output-element">output</a></code> element with its
1060: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
1061: attribute represents the element's name.</p><dl class="domintro"><dt><var title="">output</var> . <code title="dom-output-value"><a href="#dom-output-value">value</a></code> [ = <var title="">value</var> ]</dt>
1062:
1063: <dd>
1064:
1065: <p>Returns the element's current value.</p>
1066:
1067: <p>Can be set, to change the value.</p>
1068:
1069: </dd>
1070:
1071: <dt><var title="">output</var> . <code title="dom-output-defaultValue"><a href="#dom-output-defaultvalue">defaultValue</a></code> [ = <var title="">value</var> ]</dt>
1072:
1073: <dd>
1074:
1075: <p>Returns the element's current default value.</p>
1076:
1077: <p>Can be set, to change the default value.</p>
1078:
1079: </dd>
1080:
1081: <dt><var title="">output</var> . <code title="dom-output-type"><a href="#dom-output-type">type</a></code></dt>
1082:
1083: <dd>
1084:
1085: <p>Returns the string "<code title="">output</code>".</p>
1086:
1087: </dd>
1088:
1089: </dl><div class="example">
1090:
1091: <p>A simple calculator could use <code><a href="#the-output-element">output</a></code> for its
1092: display of calculated results:</p>
1093:
1094: <pre><form onsubmit="return false">
1095: <input name=a type=number step=any> +
1096: <input name=b type=number step=any> =
1.32 mike 1097: <output onforminput="value = a.valueAsNumber + b.valueAsNumber"></output>
1.9 mike 1098: </form></pre>
1099:
1.30 mike 1100: </div><h4 id="the-progress-element"><span class="secno">4.10.16 </span>The <dfn><code>progress</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments. </i><span><a href="http://www.w3.org/html/wg/tracker/issues/96">ISSUE-96</a> (progress) blocks progress to Last Call</span></p><dl class="element"><dt>Categories</dt>
1.11 mike 1101: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1102: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1103: <dd><a href="forms.html#category-label" title="category-label">Labelable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
1104: <dt>Contexts in which this element may be used:</dt>
1105: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1106: <dt>Content model:</dt>
1107: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>, but there must be no <code><a href="#the-progress-element">progress</a></code> element descendants.</dd>
1108: <dt>Content attributes:</dt>
1109: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1110: <dd><code title="attr-progress-value"><a href="#attr-progress-value">value</a></code></dd>
1111: <dd><code title="attr-progress-max"><a href="#attr-progress-max">max</a></code></dd>
1112: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1113: <dt>DOM interface:</dt>
1114: <dd>
1115: <pre class="idl">interface <dfn id="htmlprogresselement">HTMLProgressElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1116: attribute float <a href="#dom-progress-value" title="dom-progress-value">value</a>;
1117: attribute float <a href="#dom-progress-max" title="dom-progress-max">max</a>;
1118: readonly attribute float <a href="#dom-progress-position" title="dom-progress-position">position</a>;
1119: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
1.19 mike 1120: readonly attribute <a href="#nodelist">NodeList</a> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
1.11 mike 1121: };</pre>
1122: </dd>
1123: </dl><p>The <code><a href="#the-progress-element">progress</a></code> element <a href="#represents">represents</a> the
1124: completion progress of a task. The progress is either indeterminate,
1125: indicating that progress is being made but that it is not clear how
1126: much more work remains to be done before the task is complete
1127: (e.g. because the task is waiting for a remote host to respond), or
1128: the progress is a number in the range zero to a maximum, giving the
1129: fraction of work that has so far been completed.</p><p>There are two attributes that determine the current task
1130: completion represented by the element.</p><p>The <dfn id="attr-progress-value" title="attr-progress-value"><code>value</code></dfn>
1131: attribute specifies how much of the task has been completed, and the
1132: <dfn id="attr-progress-max" title="attr-progress-max"><code>max</code></dfn> attribute
1133: specifies how much work the task requires in total. The units are
1134: arbitrary and not specified.</p><p>Authors are encouraged to also include the current value and the
1135: maximum value inline as text inside the element, so that the
1136: progress is made available to users of legacy user agents.</p><div class="example">
1137: <p>Here is a snippet of a Web application that shows the progress
1138: of some automated task:</p>
1139: <pre><section>
1140: <h2>Task Progress</h2>
1141: <p>Progress: <progress id="p" max=100><span>0</span>%</progress></p>
1142: <script>
1143: var progressBar = document.getElementById('p');
1144: function updateProgress(newValue) {
1145: progressBar.value = newValue;
1146: progressBar.getElementsByTagName('span')[0].textContent = newValue;
1147: }
1148: </script>
1149: </section></pre>
1150: <p>(The <code>updateProgress()</code> method in this example would
1151: be called by some other code on the page to update the actual
1152: progress bar as the task progressed.)</p>
1153: </div><p>The <code title="attr-progress-value"><a href="#attr-progress-value">value</a></code> and <code title="attr-progress-max"><a href="#attr-progress-max">max</a></code> attributes, when present, must
1154: have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" title="valid floating point number">valid
1155: floating point numbers</a>. The <code title="attr-progress-value"><a href="#attr-progress-value">value</a></code> attribute, if present, must
1156: have a value equal to or greater than zero, and less than or equal
1157: to the value of the <code title="attr-progress-max"><a href="#attr-progress-max">max</a></code>
1158: attribute, if present, or 1.0, otherwise. The <code title="attr-progress-max"><a href="#attr-progress-max">max</a></code> attribute, if present, must
1159: have a value greater than zero.</p><p class="note">The <code><a href="#the-progress-element">progress</a></code> element is the wrong
1160: element to use for something that is just a gauge, as opposed to
1161: task progress. For instance, indicating disk space usage using
1162: <code><a href="#the-progress-element">progress</a></code> would be inappropriate. Instead, the
1163: <code><a href="#the-meter-element">meter</a></code> element is available for such use cases.</p><dl class="domintro"><dt><var title="">progress</var> . <code title="dom-progress-position"><a href="#dom-progress-position">position</a></code></dt>
1164:
1165: <dd>
1166:
1167: <p>For a determinate progress bar (one with known current and
1168: maximum values), returns the result of dividing the current value
1169: by the maximum value.</p>
1170:
1171: <p>For an indeterminate progress bar, returns −1.</p>
1172:
1.30 mike 1173: </dd></dl><h4 id="the-meter-element"><span class="secno">4.10.17 </span>The <dfn><code>meter</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments. </i><span><a href="http://www.w3.org/html/wg/tracker/issues/97">ISSUE-97</a> (meter) blocks progress to Last Call</span></p><!-- Keep this after <progress> and NOT close to <time> --><dl class="element"><dt>Categories</dt>
1.11 mike 1174: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1175: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1176: <dd><a href="forms.html#category-label" title="category-label">Labelable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
1177: <dt>Contexts in which this element may be used:</dt>
1178: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1179: <dt>Content model:</dt>
1180: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>, but there must be no <code><a href="#the-meter-element">meter</a></code> element descendants.</dd>
1181: <dt>Content attributes:</dt>
1182: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1183: <dd><code title="attr-meter-value"><a href="#attr-meter-value">value</a></code></dd>
1184: <dd><code title="attr-meter-min"><a href="#attr-meter-min">min</a></code></dd>
1185: <dd><code title="attr-meter-max"><a href="#attr-meter-max">max</a></code></dd>
1186: <dd><code title="attr-meter-low"><a href="#attr-meter-low">low</a></code></dd>
1187: <dd><code title="attr-meter-high"><a href="#attr-meter-high">high</a></code></dd>
1188: <dd><code title="attr-meter-optimum"><a href="#attr-meter-optimum">optimum</a></code></dd>
1189: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1190: <dt>DOM interface:</dt>
1191: <dd>
1192: <pre class="idl">interface <dfn id="htmlmeterelement">HTMLMeterElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1193: attribute float <a href="#dom-meter-value" title="dom-meter-value">value</a>;
1194: attribute float <a href="#dom-meter-min" title="dom-meter-min">min</a>;
1195: attribute float <a href="#dom-meter-max" title="dom-meter-max">max</a>;
1196: attribute float <a href="#dom-meter-low" title="dom-meter-low">low</a>;
1197: attribute float <a href="#dom-meter-high" title="dom-meter-high">high</a>;
1198: attribute float <a href="#dom-meter-optimum" title="dom-meter-optimum">optimum</a>;
1199: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
1.19 mike 1200: readonly attribute <a href="#nodelist">NodeList</a> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
1.11 mike 1201: };</pre>
1202: </dd>
1203: </dl><p>The <code><a href="#the-meter-element">meter</a></code> element <a href="#represents">represents</a> a scalar
1204: measurement within a known range, or a fractional value; for example
1205: disk usage, the relevance of a query result, or the fraction of a
1206: voting population to have selected a particular candidate.</p><p>This is also known as a gauge.</p><p class="note">The <code><a href="#the-meter-element">meter</a></code> element should not be used to
1207: indicate progress (as in a progress bar). For that role, HTML
1208: provides a separate <code><a href="#the-progress-element">progress</a></code> element.</p><p class="note">The <code><a href="#the-meter-element">meter</a></code> element also does not
1209: represent a scalar value of arbitrary range — for example, it
1210: would be wrong to use this to report a weight, or height, unless
1211: there is a known maximum value.</p><p>There are six attributes that determine the semantics of the
1212: gauge represented by the element.</p><p>The <dfn id="attr-meter-min" title="attr-meter-min"><code>min</code></dfn> attribute
1213: specifies the lower bound of the range, and the <dfn id="attr-meter-max" title="attr-meter-max"><code>max</code></dfn> attribute specifies
1214: the upper bound. The <dfn id="attr-meter-value" title="attr-meter-value"><code>value</code></dfn> attribute
1215: specifies the value to have the gauge indicate as the "measured"
1216: value.</p><p>The other three attributes can be used to segment the gauge's
1217: range into "low", "medium", and "high" parts, and to indicate which
1218: part of the gauge is the "optimum" part. The <dfn id="attr-meter-low" title="attr-meter-low"><code>low</code></dfn> attribute specifies
1219: 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
1220: 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
1221: gives the position that is "optimum"; if that is higher than the
1222: "high" value then this indicates that the higher the value, the
1223: better; if it's lower than the "low" mark then it indicates that
1224: lower values are better, and naturally if it is in between then it
1.17 mike 1225: indicates that neither high nor low values are good.</p><p> The <code title="attr-meter-value"><a href="#attr-meter-value">value</a></code> attribute must be
1.11 mike 1226: specified. The <code title="attr-meter-value"><a href="#attr-meter-value">value</a></code>, <code title="attr-meter-min"><a href="#attr-meter-min">min</a></code>, <code title="attr-meter-low"><a href="#attr-meter-low">low</a></code>, <code title="attr-meter-high"><a href="#attr-meter-high">high</a></code>, <code title="attr-meter-max"><a href="#attr-meter-max">max</a></code>, and <code title="attr-meter-optimum"><a href="#attr-meter-optimum">optimum</a></code> attributes, when present,
1227: must have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" title="valid floating point
1228: number">valid floating point numbers</a>.</p><p>In addition, the attributes' values are further constrained:</p><p>Let <var title="">value</var> be the <code title="attr-meter-value"><a href="#attr-meter-value">value</a></code> attribute's number.</p><p>If the <code title="attr-meter-min"><a href="#attr-meter-min">min</a></code> attribute
1229: attribute is specified, then let <var title="">minimum</var> be that
1230: attribute's value; otherwise, let it be zero.</p><p>If the <code title="attr-meter-max"><a href="#attr-meter-max">max</a></code> attribute
1231: attribute is specified, then let <var title="">maximum</var> be that
1232: attribute's value; otherwise, let it be 1.0.</p><p>The following inequalities must hold, as applicable:</p><ul class="brief"><li><var title="">minimum</var> ≤ <var title="">value</var> ≤ <var title="">maximum</var></li>
1233: <li><var title="">minimum</var> ≤ <code title="attr-meter-low"><a href="#attr-meter-low">low</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-low"><a href="#attr-meter-low">low</a></code> is specified)</li>
1234: <li><var title="">minimum</var> ≤ <code title="attr-meter-high"><a href="#attr-meter-high">high</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-high"><a href="#attr-meter-high">high</a></code> is specified)</li>
1235: <li><var title="">minimum</var> ≤ <code title="attr-meter-optimum"><a href="#attr-meter-optimum">optimum</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-optimum"><a href="#attr-meter-optimum">optimum</a></code> is specified)</li>
1.21 mike 1236: <li><code title="attr-meter-low"><a href="#attr-meter-low">low</a></code> ≤ <code title="attr-meter-high"><a href="#attr-meter-high">high</a></code> (if both <code title="attr-meter-low"><a href="#attr-meter-low">low</a></code> and <code title="attr-meter-high"><a href="#attr-meter-high">high</a></code> are specified)</li>
1237: </ul><p class="note">If no minimum or maximum is specified, then the
1.11 mike 1238: range is assumed to be 0..1, and the value thus has to be within
1239: that range.</p><p>Authors are encouraged to include a textual representation of the
1240: gauge's state in the element's contents, for users of user agents
1241: that do not support the <code><a href="#the-meter-element">meter</a></code> element.</p><div class="example">
1242:
1243: <p>The following examples show three gauges that would all be
1244: three-quarters full:</p>
1245:
1246: <pre>Storage space usage: <meter value=6 max=8>6 blocks used (out of 8 total)</meter>
1247: Voter turnout: <meter value=0.75><img alt="75%" src="graph75.png"></meter>
1248: Tickets sold: <meter min="0" max="100" value="75"></meter></pre>
1249:
1250: <p>The following example is incorrect use of the element, because
1251: it doesn't give a range (and since the default maximum is 1, both
1252: of the gauges would end up looking maxed out):</p>
1253:
1254: <pre class="bad"><p>The grapefruit pie had a radius of <meter value=12>12cm</meter>
1255: and a height of <meter value=2>2cm</meter>.</p> <!-- <strong>BAD!</strong> --></pre>
1256:
1257: <p>Instead, one would either not include the meter element, or use
1258: the meter element with a defined range to give the dimensions in
1259: context compared to other pies:</p>
1260:
1261: <pre><p>The grapefruit pie had a radius of 12cm and a height of
1262: 2cm.</p>
1263: <dl>
1264: <dt>Radius: <dd> <meter min=0 max=20 value=12>12cm</meter>
1265: <dt>Height: <dd> <meter min=0 max=10 value=2>2cm</meter>
1266: </dl></pre>
1267:
1268: </div><p>There is no explicit way to specify units in the
1269: <code><a href="#the-meter-element">meter</a></code> element, but the units may be specified in the
1270: <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute in free-form text.</p><div class="example">
1271:
1272: <p>The example above could be extended to mention the units:</p>
1273:
1274: <pre><dl>
1275: <dt>Radius: <dd> <meter min=0 max=20 value=12 title="centimeters">12cm</meter>
1276: <dt>Height: <dd> <meter min=0 max=10 value=2 title="centimeters">2cm</meter>
1277: </dl></pre>
1278:
1279: </div><div class="example">
1280: <p>The following markup:</p>
1281: <pre><h3>Suggested groups</h3>
1282: <menu type="toolbar">
1283: <a href="?cmd=hsg" onclick="hideSuggestedGroups()">Hide suggested groups</a>
1284: </menu>
1285: <ul>
1286: <li>
1287: <p><a href="/group/comp.infosystems.www.authoring.stylesheets/view">comp.infosystems.www.authoring.stylesheets</a> -
1288: <a href="/group/comp.infosystems.www.authoring.stylesheets/subscribe">join</a></p>
1289: <p>Group description: <strong>Layout/presentation on the WWW.</strong></p>
1290: <p><strong><meter value="0.5">Moderate activity,</meter></strong> Usenet, 618 subscribers</p>
1291: </li>
1292: <li>
1293: <p><a href="/group/netscape.public.mozilla.xpinstall/view">netscape.public.mozilla.xpinstall</a> -
1294: <a href="/group/netscape.public.mozilla.xpinstall/subscribe">join</a></p>
1295: <p>Group description: <strong>Mozilla XPInstall discussion.</strong></p>
1296: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 22 subscribers</p>
1297: </li>
1298: <li>
1299: <p><a href="/group/mozilla.dev.general/view">mozilla.dev.general</a> -
1300: <a href="/group/mozilla.dev.general/subscribe">join</a></p>
1301: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 66 subscribers</p>
1302: </li>
1303: </ul></pre>
1304: <p>Might be rendered as follows:</p>
1305: <p><img alt="With the <meter> elements rendered as inline green bars of varying lengths." src="http://dev.w3.org/html5/spec/images/sample-meter.png"></p>
1.13 mike 1306: </div><p>User agents combine the value of
1307: the <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute and the other
1.11 mike 1308: attributes to provide context-sensitive help or inline text
1309: detailing the actual values.</p><div class="example">
1310: <p>For example, the following snippet:</p>
1311: <pre><meter min=0 max=60 value=23.2 title=seconds></meter></pre>
1312: <p>...might cause the user agent to display a gauge with a tooltip
1313: saying "Value: 23.2 out of 60." on one line and "seconds" on a
1314: second line.</p>
1315: </div><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
1316: explicitly associate the <code><a href="#the-meter-element">meter</a></code> element with its
1.27 mike 1317: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>.</p><div class="example">
1.11 mike 1318:
1319: <p>The following example shows how a gauge could fall back to
1320: localized or pretty-printed text.</p>
1321:
1322: <pre><p>Disk usage: <meter min=0 value=170261928 max=233257824>170 261 928 bytes used
1323: out of 233 257 824 bytes available</meter></p></pre>
1324:
1.9 mike 1325: </div></body></html>
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