Annotation of html5/spec-author-view/the-button-element.html, revision 1.14
1.1 mike 1: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
2: <!DOCTYPE html>
1.5 mike 3: <!-- when publishing, change bits marked ZZZ --><html lang="en-US-x-Hixie" class="split chapter"><head><title>4.10.6 The button element — HTML5 (Author Edition)</title><script src="link-fixup.js"></script><link href="whatwg.css" rel="stylesheet"><style type="text/css">
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59: dl.triple dd:after { content: '\A'; white-space: pre; }
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62: a .diff-new { border-bottom: 1px blue solid; }
63:
64: h2 { page-break-before: always; }
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169:
1.14 ! mike 170: body.dfnEnabled dfn { cursor: pointer; }
! 171: .dfnPanel {
! 172: display: inline;
! 173: position: absolute;
! 174: z-index: 10;
! 175: height: auto;
! 176: width: auto;
! 177: padding: 0.5em 0.75em;
! 178: font: small sans-serif, Droid Sans Fallback;
! 179: background: #DDDDDD;
! 180: color: black;
! 181: border: outset 0.2em;
! 182: }
! 183: .dfnPanel * { margin: 0; padding: 0; font: inherit; text-indent: 0; }
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! 186: .dfnPanel * + p { margin-top: 0.25em; }
! 187: .dfnPanel li { list-style-position: inside; }
! 188:
1.1 mike 189: #configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
190: #configUI p { margin: 0.5em 0; padding: 0.3em; background: #EEEEEE; color: black; border: inset thin; }
191: #configUI p label { display: block; }
192: #configUI #updateUI, #configUI .loginUI { text-align: center; }
193: #configUI input[type=button] { display: block; margin: auto; }
194: </style><style type="text/css">
195:
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199: .applies td { text-align: center; }
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225:
226: .apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
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229: .apple-table-examples tbody th:first-child { border-left: none; width: 100%; }
230: .apple-table-examples thead th:first-child ~ th { font-size: smaller; font-weight: bolder; border-bottom: solid 2px; text-align: center; }
231: .apple-table-examples tbody th::after, .apple-table-examples tfoot th::after { content: leader(". ") }
232: .apple-table-examples tbody th, .apple-table-examples tfoot th { font: inherit; text-align: left; }
233: .apple-table-examples td { text-align: right; vertical-align: top; }
234: .apple-table-examples.e1 tbody tr:last-child td { border-bottom: solid 1px; }
1.9 mike 235: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
236: .apple-table-examples.e2 th[scope=row] { padding-left: 1em; }
237: .apple-table-examples sup { line-height: 0; }
238:
1.11 mike 239: .details-example img { vertical-align: top; }
240:
241: </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" id="author" rel="alternate stylesheet" title="Author documentation only"><link href="data:text/css,.impl%20%7B%20background:%20%23FFEEEE;%20%7D" id="highlight" rel="alternate stylesheet" title="Highlight implementation requirements"><script type="text/javascript">
1.9 mike 242: function getCookie(name) {
243: var params = location.search.substr(1).split("&");
244: for (var index = 0; index < params.length; index++) {
245: if (params[index] == name)
246: return "1";
247: var data = params[index].split("=");
248: if (data[0] == name)
249: return unescape(data[1]);
250: }
251: var cookies = document.cookie.split("; ");
252: for (var index = 0; index < cookies.length; index++) {
253: var data = cookies[index].split("=");
254: if (data[0] == name)
255: return unescape(data[1]);
256: }
257: return null;
258: }
259: function load(script) {
260: var e = document.createElement('script');
261: e.setAttribute('src', 'http://www.whatwg.org/specs/web-apps/current-work/' + script + '?' + encodeURIComponent(location) + '&' + encodeURIComponent(document.referrer));
262: document.body.appendChild(e);
263: }
264: function init() {
265: if (location.search == '?slow-browser')
266: return;
267: var configUI = document.createElement('div');
268: configUI.id = 'configUI';
269: document.body.appendChild(configUI);
270: // load('reviewer.js'); // would need cross-site XHR
271: if (document.getElementById('head'))
272: load('toc.js');
273:
274: // load('updater.js'); // would need cross-site XHR
1.11 mike 275: load('dfn.js'); // doesn't support split-out specs, but, oh well.
1.9 mike 276: // load('status.js'); // would need cross-site XHR
277: if (getCookie('profile') == '1')
278: document.getElementsByTagName('h2')[0].textContent += '; load: ' + (new Date() - loadTimer) + 'ms';
279: fixBrokenLink();
280: }
281: </script><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><link href="common-input-element-attributes.html" title="4.10.5.2 Common input element attributes" rel="prev">
282: <link href="Overview.html#contents" title="Table of contents" rel="index">
1.11 mike 283: <link href="association-of-controls-and-forms.html" title="4.10.16 Association of controls and forms" rel="next">
1.9 mike 284: </head><body onload="fixBrokenLink(); init()"><div class="head" id="head">
285: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
286: <h1>HTML5 (Author Edition)</h1>
287: </div><div>
288: <a href="common-input-element-attributes.html">← 4.10.5.2 Common input element attributes</a> –
289: <a href="Overview.html#contents">Table of contents</a> –
1.11 mike 290: <a href="association-of-controls-and-forms.html">4.10.16 Association of controls and forms →</a>
291: <ol class="toc"><li><ol><li><ol><li><a href="the-button-element.html#the-button-element"><span class="secno">4.10.6 </span>The <code>button</code> element</a></li><li><a href="the-button-element.html#the-select-element"><span class="secno">4.10.7 </span>The <code>select</code> element</a></li><li><a href="the-button-element.html#the-datalist-element"><span class="secno">4.10.8 </span>The <code>datalist</code> element</a></li><li><a href="the-button-element.html#the-optgroup-element"><span class="secno">4.10.9 </span>The <code>optgroup</code> element</a></li><li><a href="the-button-element.html#the-option-element"><span class="secno">4.10.10 </span>The <code>option</code> element</a></li><li><a href="the-button-element.html#the-textarea-element"><span class="secno">4.10.11 </span>The <code>textarea</code> element</a></li><li><a href="the-button-element.html#the-keygen-element"><span class="secno">4.10.12 </span>The <code>keygen</code> element</a></li><li><a href="the-button-element.html#the-output-element"><span class="secno">4.10.13 </span>The <code>output</code> element</a></li><li><a href="the-button-element.html#the-progress-element"><span class="secno">4.10.14 </span>The <code>progress</code> element</a></li><li><a href="the-button-element.html#the-meter-element"><span class="secno">4.10.15 </span>The <code>meter</code> element</a></li></ol></li></ol></li></ol></div>
1.9 mike 292:
293: <h4 id="the-button-element"><span class="secno">4.10.6 </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>
294: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
295: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
296: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
297: <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>
298: <dt>Contexts in which this element may be used:</dt>
299: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
300: <dt>Content model:</dt>
301: <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>
302: <dt>Content attributes:</dt>
303: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
304: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
305: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
306: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
307: <dd><code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code></dd>
308: <dd><code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code></dd>
309: <dd><code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code></dd>
310: <dd><code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code></dd>
311: <dd><code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code></dd>
312: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
313: <dd><code title="attr-button-type"><a href="#attr-button-type">type</a></code></dd>
314: <dd><code title="attr-button-value"><a href="#attr-button-value">value</a></code></dd>
315: <dt>DOM interface:</dt>
316: <dd>
317: <pre class="idl">interface <dfn id="htmlbuttonelement">HTMLButtonElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
318: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
319: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
320: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
321: attribute DOMString <a href="#dom-fs-formaction" title="dom-fs-formAction">formAction</a>;
322: attribute DOMString <a href="#dom-fs-formenctype" title="dom-fs-formEnctype">formEnctype</a>;
323: attribute DOMString <a href="#dom-fs-formmethod" title="dom-fs-formMethod">formMethod</a>;
324: attribute DOMString <a href="#dom-fs-formnovalidate" title="dom-fs-formNoValidate">formNoValidate</a>;
325: attribute DOMString <a href="#dom-fs-formtarget" title="dom-fs-formTarget">formTarget</a>;
326: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
327: attribute DOMString <a href="#dom-button-type" title="dom-button-type">type</a>;
328: attribute DOMString <a href="#dom-button-value" title="dom-button-value">value</a>;
329:
330: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
331: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
332: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
333: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
334: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
335:
336: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
337: };</pre>
338: </dd>
339: </dl><p>The <code><a href="#the-button-element">button</a></code> element <a href="#represents">represents</a> a
340: 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>
341: attribute controls the behavior of the button when it is activated.
342: It is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following table
343: lists the keywords and states for the attribute — the keywords
344: in the left column map to the states in the cell in the second
345: column on the same row as the keyword.</p><table><thead><tr><th> Keyword
346: </th><th> State
347: </th><th> Brief description
348: </th></tr></thead><tbody><tr><td><dfn id="attr-button-type-submit" title="attr-button-type-submit"><code>submit</code></dfn>
349: </td><td><a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
350: </td><td>Submits the form.
351: </td></tr><tr><td><dfn id="attr-button-type-reset" title="attr-button-type-reset"><code>reset</code></dfn>
352: </td><td><a href="#attr-button-type-reset-state" title="attr-button-type-reset-state">Reset Button</a>
353: </td><td>Resets the form.
354: </td></tr><tr><td><dfn id="attr-button-type-button" title="attr-button-type-button"><code>button</code></dfn>
355: </td><td><a href="#attr-button-type-button-state" title="attr-button-type-button-state">Button</a>
356: </td><td>Does nothing.
357: </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>
358: state.</p><p>If the <code title="attr-button-type"><a href="#attr-button-type">type</a></code> attribute is in
359: the <a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
360: 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
361: explicitly associate the <code><a href="#the-button-element">button</a></code> element with its
362: <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>
363: 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
364: the control non-interactive and to prevent its value from being
365: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
366: 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
367: <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
368: be used to make submit buttons that do not trigger the constraint
369: validation.</p><p>The <dfn id="attr-button-value" title="attr-button-value"><code>value</code></dfn>
370: attribute gives the element's value for the purposes of form
1.10 mike 371: submission. The element's <a href="#concept-fe-value" title="concept-fe-value">value</a> is the value of the element's
372: <code title="attr-button-value"><a href="#attr-button-value">value</a></code> attribute, if there is
373: one, or the empty string otherwise.</p><p class="note">A button (and its value) is only included in the
1.9 mike 374: form submission if the button itself was used to initiate the form
375: submission.</p><div class="example">
376:
377: <p>The following button is labeled "Show hint" and pops up a dialog
378: box when activated:</p>
379:
380: <pre><button type=button
381: onclick="alert('This 15-20 minute piece was composed by George Gershwin.')">
382: Show hint
383: </button></pre>
384:
385: </div><h4 id="the-select-element"><span class="secno">4.10.7 </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>
386: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
387: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
388: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
389: <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>
390: <dt>Contexts in which this element may be used:</dt>
391: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
392: <dt>Content model:</dt>
393: <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>
394: <dt>Content attributes:</dt>
395: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
396: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
397: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
398: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
399: <dd><code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code></dd>
400: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
401: <dd><code title="attr-select-size"><a href="#attr-select-size">size</a></code></dd>
402: <dt>DOM interface:</dt>
403: <dd>
404: <pre class="idl">interface <dfn id="htmlselectelement">HTMLSelectElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
405: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
406: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
407: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
408: attribute boolean <a href="#dom-select-multiple" title="dom-select-multiple">multiple</a>;
409: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
410: attribute unsigned long <a href="#dom-select-size" title="dom-select-size">size</a>;
411:
412: readonly attribute DOMString <a href="#dom-select-type" title="dom-select-type">type</a>;
413:
414: readonly attribute <a href="urls.html#htmloptionscollection">HTMLOptionsCollection</a> <a href="#dom-select-options" title="dom-select-options">options</a>;
415: attribute unsigned long <a href="#dom-select-length" title="dom-select-length">length</a>;
416: caller getter any <a href="#dom-select-item" title="dom-select-item">item</a>(in unsigned long index);
417: caller getter any <a href="#dom-select-nameditem" title="dom-select-namedItem">namedItem</a>(in DOMString name);
418: 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);
419: void <a href="#dom-select-add" title="dom-select-add">add</a>(in <a href="elements.html#htmlelement">HTMLElement</a> element, in long before);
420: void <a href="#dom-select-remove" title="dom-select-remove">remove</a>(in long index);
421:
422: readonly attribute <a href="urls.html#htmlcollection">HTMLCollection</a> <a href="#dom-select-selectedoptions" title="dom-select-selectedOptions">selectedOptions</a>;
423: attribute long <a href="#dom-select-selectedindex" title="dom-select-selectedIndex">selectedIndex</a>;
424: attribute DOMString <a href="#dom-select-value" title="dom-select-value">value</a>;
425:
426: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
427: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
428: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
429: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
430: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
431:
432: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
433: };</pre>
434: </dd>
435: </dl><!-- Proposals for v2:
436: * <select value=""> as an alternative to <option selected>
437: http://developers.slashdot.org/comments.pl?sid=426306&cid=22142072
1.11 mike 438: <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 439: src="/js/flightcity.js"></SCRIPT></select> which is the kind of thing that could be much simpler with <select value="PEK">
440: * a way to make the <select> not have a default value at all (ack
441: 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
442: * once we can have no default, a way to require="" a value.
443: ack Weston Ruter: http://weston.ruter.net/projects/test-cases/html-select-element/
444: q.v. http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2008-November/017583.html
445: --><p>The <code><a href="#the-select-element">select</a></code> element represents a control for
446: selecting amongst a set of options.</p><p>The <dfn id="attr-select-multiple" title="attr-select-multiple"><code>multiple</code></dfn>
447: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. If the attribute is
448: present, then the <code><a href="#the-select-element">select</a></code> element
449: <a href="#represents">represents</a> a control for selecting zero or more options
450: from the <a href="#concept-select-option-list" title="concept-select-option-list">list of
451: options</a>. If the attribute is absent, then the
452: <code><a href="#the-select-element">select</a></code> element <a href="#represents">represents</a> a control for
453: 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>
454: for a <code><a href="#the-select-element">select</a></code> element consists of all the
455: <code><a href="#the-option-element">option</a></code> element children of the <code><a href="#the-select-element">select</a></code>
456: element, and all the <code><a href="#the-option-element">option</a></code> element children of all the
457: <code><a href="#the-optgroup-element">optgroup</a></code> element children of the <code><a href="#the-select-element">select</a></code>
458: 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>
459: 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
460: have a value that is a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a>
461: greater than zero. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is present,
462: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
463: default value is 4. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is absent,
464: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
465: 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
466: explicitly associate the <code><a href="#the-select-element">select</a></code> element with its
467: <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>
468: 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
469: the control non-interactive and to prevent its value from being
470: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
471: 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>
472:
473: <dd>
474:
475: <p>Returns "<code title="">select-multiple</code>" if the element
476: has a <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
477: attribute, and "<code title="">select-one</code>"
478: otherwise.</p>
479:
480: </dd>
481:
482: <dt><var title="">select</var> . <code title="dom-select-options"><a href="#dom-select-options">options</a></code></dt>
483:
484: <dd>
485:
486: <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>
487:
488: </dd>
489:
490: <dt><var title="">select</var> . <code title="dom-select-length"><a href="#dom-select-length">length</a></code> [ = <var title="">value</var> ]</dt>
491: <dd>
492: <p>Returns the number of elements in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
493: <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>
494: <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>
495: </dd>
496:
497: <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>
498: <dt><var title="">select</var>[<var title="">index</var>]</dt>
499: <dt><var title="">select</var>(<var title="">index</var>)</dt>
500: <dd>
501: <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>
502: <p>Returns null if <var title="">index</var> is out of range.</p>
503: </dd>
504:
505: <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>
506: <dt><var title="">select</var>[<var title="">name</var>]</dt>
507: <dt><var title="">select</var>(<var title="">name</var>)</dt>
508: <dd>
509: <p>Returns the item with ID or <code title="attr-option-name">name</code> <var title="">name</var> from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
510: <p>If there are multiple matching items, then a <code>NodeList</code> object containing all those elements is returned.</p>
511: <p>Returns null if no element with that ID could be found.</p>
512: </dd>
513:
514: <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>
515: <dd>
516: <p>Inserts <var title="">element</var> before the node given by <var title="">before</var>.</p>
517: <p>The <var title="">before</var> argument can be a number, in
518: which case <var title="">element</var> is inserted before the item
519: with that number, or an element from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>, in
520: which case <var title="">element</var> is inserted before that
521: element.</p>
522: <p>If <var title="">before</var> is omitted, null, or a number out
523: of range, then <var title="">element</var> will be added at the
524: end of the list.</p>
525: <p>This method will throw a <code><a href="urls.html#hierarchy_request_err">HIERARCHY_REQUEST_ERR</a></code>
526: exception if <var title="">element</var> is an ancestor of the
527: 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
528: <code><a href="#the-optgroup-element">optgroup</a></code> element, then the method does nothing.</p>
529: </dd>
530:
531: <dt><var title="">select</var> . <code title="dom-select-selectedOptions"><a href="#dom-select-selectedoptions">selectedOptions</a></code></dt>
532:
533: <dd>
534:
535: <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
536: selected.</p>
537:
538: </dd>
539:
540: <dt><var title="">select</var> . <code title="dom-select-selectedIndex"><a href="#dom-select-selectedindex">selectedIndex</a></code> [ = <var title="">value</var> ]</dt>
541:
542: <dd>
543:
544: <p>Returns the index of the first selected item, if any, or
545: −1 if there is no selected item.</p>
546:
547: <p>Can be set, to change the selection.</p>
548:
549: </dd>
550:
551: <dt><var title="">select</var> . <code title="dom-select-value"><a href="#dom-select-value">value</a></code> [ = <var title="">value</var> ]</dt>
552:
553: <dd>
554:
555: <p>Returns the <a href="#concept-fe-value" title="concept-fe-value">value</a> of the
556: first selected item, if any, or the empty string if there is no
557: selected item.</p>
558:
559: <p>Can be set, to change the selection.</p>
560:
561: </dd>
562:
563: </dl><div class="example">
564:
565: <p>The following example shows how a <code><a href="#the-select-element">select</a></code> element
566: can be used to offer the user with a set of options from which the
567: user can select a single option. The default option is
568: preselected.</p>
569:
570: <pre><p>
571: <label for="unittype">Select unit type:</label>
572: <select id="unittype" name="unittype">
573: <option value="1"> Miner </option>
574: <option value="2"> Puffer </option>
575: <option value="3" selected> Snipey </option>
576: <option value="4"> Max </option>
577: <option value="5"> Firebot </option>
578: </select>
579: </p></pre>
580:
581: </div><div class="example">
582:
583: <p>Here, the user is offered a set of options from which he can
584: select any number. By default, all five options are selected.</p>
585:
586: <pre><p>
587: <label for="allowedunits">Select unit types to enable on this map:</label>
588: <select id="allowedunits" name="allowedunits" multiple>
589: <option value="1" selected> Miner </option>
590: <option value="2" selected> Puffer </option>
591: <option value="3" selected> Snipey </option>
592: <option value="4" selected> Max </option>
593: <option value="5" selected> Firebot </option>
594: </select>
595: </p></pre>
596:
597: </div><h4 id="the-datalist-element"><span class="secno">4.10.8 </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>
598: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
599: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
600: <dt>Contexts in which this element may be used:</dt>
601: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
602: <dt>Content model:</dt>
603: <dd>Either: <a href="content-models.html#phrasing-content">phrasing content</a>.</dd>
604: <dd>Or: Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
605: <dt>Content attributes:</dt>
606: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
607: <dt>DOM interface:</dt>
608: <dd>
609: <pre class="idl">interface <dfn id="htmldatalistelement">HTMLDataListElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
610: readonly attribute <a href="urls.html#htmlcollection">HTMLCollection</a> <a href="#dom-datalist-options" title="dom-datalist-options">options</a>;
611: };</pre>
612: </dd>
613: </dl><p>The <code><a href="#the-datalist-element">datalist</a></code> element represents a set of
614: <code><a href="#the-option-element">option</a></code> elements that represent predefined options for
615: other controls. The contents of the element represents fallback
616: content for legacy user agents, intermixed with <code><a href="#the-option-element">option</a></code>
617: elements that represent the predefined options. In the rendering,
618: the <code><a href="#the-datalist-element">datalist</a></code> element <a href="#represents">represents</a>
619: nothing.</p><p>The <code><a href="#the-datalist-element">datalist</a></code> element is hooked up to an
620: <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
621: <code><a href="the-input-element.html#the-input-element">input</a></code> element. <!-- v2DATAGRID The
622: <code>datalist</code> element can also be used with a
623: <code>datagrid</code> element, as the source of autocompletion hints
624: for <code title="datagrid-type-editable">editable</code>
625: cells. --></p><p>Each <code><a href="#the-option-element">option</a></code> element that is a descendant of the
626: <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
627: 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>.
628:
629: </p><dl class="domintro"><dt><var title="">datalist</var> . <code title="dom-datalist-options"><a href="#dom-datalist-options">options</a></code></dt>
630:
631: <dd>
632: <p>Returns an <code><a href="urls.html#htmlcollection">HTMLCollection</a></code> of the <code>options</code> elements of the table.</p>
633: </dd>
634:
635: </dl><h4 id="the-optgroup-element"><span class="secno">4.10.9 </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>
636: <dd>None.</dd>
637: <dt>Contexts in which this element may be used:</dt>
638: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
639: <dt>Content model:</dt>
640: <dd>Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
641: <dt>Content attributes:</dt>
642: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
643: <dd><code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled">disabled</a></code></dd>
644: <dd><code title="attr-optgroup-label"><a href="#attr-optgroup-label">label</a></code></dd>
645: <dt>DOM interface:</dt>
646: <dd>
647: <pre class="idl">interface <dfn id="htmloptgroupelement">HTMLOptGroupElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
648: attribute boolean <a href="#dom-optgroup-disabled" title="dom-optgroup-disabled">disabled</a>;
649: attribute DOMString <a href="#dom-optgroup-label" title="dom-optgroup-label">label</a>;
650: };</pre>
651: </dd>
652: </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
653: <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
654: the <code><a href="#the-option-element">option</a></code> elements that are children of the
655: <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
656: 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
657: <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>
658: attribute must be specified. Its value gives the name of the group,
659: for the purposes of the user interface. </p><div class="example">
660:
661: <p>The following snippet shows how a set of lessons from three
662: courses could be offered in a <code><a href="#the-select-element">select</a></code> drop-down
663: widget:</p>
664:
665: <pre><form action="courseselector.dll" method="get">
666: <p>Which course would you like to watch today?
667: <p><label>Course:
668: <select name="c">
669: <optgroup label="8.01 Physics I: Classical Mechanics">
670: <option value="8.01.1">Lecture 01: Powers of Ten
671: <option value="8.01.2">Lecture 02: 1D Kinematics
672: <option value="8.01.3">Lecture 03: Vectors
673: <optgroup label="8.02 Electricity and Magnestism">
674: <option value="8.02.1">Lecture 01: What holds our world together?
675: <option value="8.02.2">Lecture 02: Electric Field
676: <option value="8.02.3">Lecture 03: Electric Flux
677: <optgroup label="8.03 Physics III: Vibrations and Waves">
678: <option value="8.03.1">Lecture 01: Periodic Phenomenon
679: <option value="8.03.2">Lecture 02: Beats
680: <option value="8.03.3">Lecture 03: Forced Oscillations with Damping
681: </select>
682: </label>
683: <p><input type=submit value="▶ Play">
684: </form></pre>
685:
686: </div><h4 id="the-option-element"><span class="secno">4.10.10 </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>
687: <dd>None.</dd>
688: <dt>Contexts in which this element may be used:</dt>
689: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
690: <dd>As a child of a <code><a href="#the-datalist-element">datalist</a></code> element.</dd>
691: <dd>As a child of an <code><a href="#the-optgroup-element">optgroup</a></code> element.</dd>
692: <dt>Content model:</dt>
693: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
694: <dt>Content attributes:</dt>
695: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
696: <dd><code title="attr-option-disabled"><a href="#attr-option-disabled">disabled</a></code></dd>
697: <dd><code title="attr-option-label"><a href="#attr-option-label">label</a></code></dd>
698: <dd><code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code></dd>
699: <dd><code title="attr-option-value"><a href="#attr-option-value">value</a></code></dd>
700: <dt>DOM interface:</dt>
701: <dd>
702: <pre class="idl">[NamedConstructor=<a href="#dom-option" title="dom-option">Option</a>(),
703: NamedConstructor=<a href="#dom-option-t" title="dom-option-t">Option</a>(in DOMString text),
704: NamedConstructor=<a href="#dom-option-tv" title="dom-option-tv">Option</a>(in DOMString text, in DOMString value),
705: NamedConstructor=<a href="#dom-option-tvd" title="dom-option-tvd">Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected),
706: NamedConstructor=<a href="#dom-option-tvds" title="dom-option-tvds">Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected, in boolean selected)]
707: interface <dfn id="htmloptionelement">HTMLOptionElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
708: attribute boolean <a href="#dom-option-disabled" title="dom-option-disabled">disabled</a>;
709: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-option-form" title="dom-option-form">form</a>;
710: attribute DOMString <a href="#dom-option-label" title="dom-option-label">label</a>;
711: attribute boolean <a href="#dom-option-defaultselected" title="dom-option-defaultSelected">defaultSelected</a>;
712: attribute boolean <a href="#dom-option-selected" title="dom-option-selected">selected</a>;
713: attribute DOMString <a href="#dom-option-value" title="dom-option-value">value</a>;
714:
715: attribute DOMString <a href="#dom-option-text" title="dom-option-text">text</a>;
716: readonly attribute long <a href="#dom-option-index" title="dom-option-index">index</a>;
717: };</pre>
718: </dd>
719: </dl><p>The <code><a href="#the-option-element">option</a></code> element <a href="#represents">represents</a> an option
720: in a <code><a href="#the-select-element">select</a></code> element or as part of a list of suggestions
721: 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>
722: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. An
723: <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
724: 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
725: present.</p><p>The <dfn id="attr-option-label" title="attr-option-label"><code>label</code></dfn>
726: 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>
727: element is the value of the <code title="attr-option-label"><a href="#attr-option-label">label</a></code> attribute, if there is one,
728: or the <code>textContent</code> of the element, if there isn't.</p><p>The <dfn id="attr-option-value" title="attr-option-value"><code>value</code></dfn>
729: 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>
730: element is the value of the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute, if there is one,
731: or the <code>textContent</code> of the element, if there isn't.</p><p>The <dfn id="attr-option-selected" title="attr-option-selected"><code>selected</code></dfn>
732: attribute represents the default <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of the
733: element.</p><dl class="domintro"><dt><var title="">option</var> . <code title="dom-option-selected"><a href="#dom-option-selected">selected</a></code></dt>
734:
735: <dd>
736:
737: <p>Returns true if the element is selected, and false otherwise.</p>
738:
739: </dd>
740:
741: <dt><var title="">option</var> . <code title="dom-option-index"><a href="#dom-option-index">index</a></code></dt>
742:
743: <dd>
744:
745: <p>Returns the index of the element in its <code><a href="#the-select-element">select</a></code>
746: element's <code title="dom-select-options"><a href="#dom-select-options">options</a></code>
747: list.</p>
748:
749: </dd>
750:
751: <dt><var title="">option</var> . <code title="dom-option-form"><a href="#dom-option-form">form</a></code></dt>
752:
753: <dd>
754:
755: <p>Returns the element's <code><a href="forms.html#the-form-element">form</a></code> element, if any, or
756: null otherwise.</p>
757:
758: </dd>
759:
1.11 mike 760: <dt><var title="">option</var> . <code title="dom-option-text"><a href="#dom-option-text">text</a></code></dt>
761:
762: <dd>
763:
764: <p>Same as <code>textContent</code>.</p>
765:
766: </dd>
767:
1.9 mike 768: <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>
769:
770: <dd>
771:
772: <p>Returns a new <code><a href="#the-option-element">option</a></code> element.</p>
773:
774: <p>The <var title="">text</var> argument sets the contents of the element.</p>
775: <p>The <var title="">value</var> argument sets the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute.</p>
776: <p>The <var title="">defaultSelected</var> argument sets the <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute.</p>
777: <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>
778:
779: </dd>
780:
781: </dl><h4 id="the-textarea-element"><span class="secno">4.10.11 </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>
782: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
783: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
784: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
785: <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>
786: <dt>Contexts in which this element may be used:</dt>
787: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
788: <dt>Content model:</dt>
789: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
790: <dt>Content attributes:</dt>
791: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
792: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
793: <dd><code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code></dd>
794: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
795: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
796: <dd><code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength">maxlength</a></code></dd>
797: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
798: <dd><code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code></dd>
799: <dd><code title="attr-textarea-readonly"><a href="#attr-textarea-readonly">readonly</a></code></dd>
800: <dd><code title="attr-textarea-required"><a href="#attr-textarea-required">required</a></code></dd>
801: <dd><code title="attr-textarea-rows"><a href="#attr-textarea-rows">rows</a></code></dd>
802: <dd><code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code></dd>
803: <dt>DOM interface:</dt>
804: <dd>
805: <pre class="idl">interface <dfn id="htmltextareaelement">HTMLTextAreaElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
806: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
807: attribute unsigned long <a href="#dom-textarea-cols" title="dom-textarea-cols">cols</a>;
808: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
809: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
810: attribute long <a href="#dom-textarea-maxlength" title="dom-textarea-maxLength">maxLength</a>;
811: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
812: attribute DOMString <a href="#dom-textarea-placeholder" title="dom-textarea-placeholder">placeholder</a>;
813: attribute boolean <a href="#dom-textarea-readonly" title="dom-textarea-readOnly">readOnly</a>;
814: attribute boolean <a href="#dom-textarea-required" title="dom-textarea-required">required</a>;
815: attribute unsigned long <a href="#dom-textarea-rows" title="dom-textarea-rows">rows</a>;
816: attribute DOMString <a href="#dom-textarea-wrap" title="dom-textarea-wrap">wrap</a>;
817:
818: readonly attribute DOMString <a href="#dom-textarea-type" title="dom-textarea-type">type</a>;
819: attribute DOMString <a href="#dom-textarea-defaultvalue" title="dom-textarea-defaultValue">defaultValue</a>;
820: attribute DOMString <a href="#dom-textarea-value" title="dom-textarea-value">value</a>;
821: readonly attribute unsigned long <a href="#dom-textarea-textlength" title="dom-textarea-textLength">textLength</a>;
822:
823: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
824: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
825: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
826: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
827: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
828:
829: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
830:
831: void <a href="#dom-textarea-input-select" title="dom-textarea/input-select">select</a>();
832: attribute unsigned long <a href="#dom-textarea-input-selectionstart" title="dom-textarea/input-selectionStart">selectionStart</a>;
833: attribute unsigned long <a href="#dom-textarea-input-selectionend" title="dom-textarea/input-selectionEnd">selectionEnd</a>;
834: void <a href="#dom-textarea-input-setselectionrange" title="dom-textarea/input-setSelectionRange">setSelectionRange</a>(in unsigned long start, in unsigned long end);
835: };</pre>
836: </dd>
837: </dl><p>The <code><a href="#the-textarea-element">textarea</a></code> element <a href="#represents">represents</a> a
838: multiline plain text edit control. The contents of the control represent the
839: control's default value.</p><p>The <dfn id="attr-textarea-readonly" title="attr-textarea-readonly"><code>readonly</code></dfn> attribute
840: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a> used to control whether the text
841: can be edited by the user or not.</p><p>The <dfn id="attr-textarea-cols" title="attr-textarea-cols"><code>cols</code></dfn>
842: attribute specifies the expected maximum number of characters per
843: line. If the <code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code> attribute
844: is specified, its value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative
845: integer</a> greater than zero. </p><p>The <dfn id="attr-textarea-rows" title="attr-textarea-rows"><code>rows</code></dfn>
846: 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
847: value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a> greater than
848: zero. </p><p>The <dfn id="attr-textarea-wrap" title="attr-textarea-wrap"><code>wrap</code></dfn>
849: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a> with two keywords
850: and states: the <dfn id="attr-textarea-wrap-soft" title="attr-textarea-wrap-soft"><code>soft</code></dfn> keyword
851: which maps to the <dfn id="attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</dfn> state, and the
852: <dfn id="attr-textarea-wrap-hard" title="attr-textarea-wrap-hard"><code>hard</code></dfn> keyword
853: which maps to the <dfn id="attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</dfn> state. The
854: <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>
855: 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
856: specified.</p><!-- attr-textarea-wrap-off (attr-textarea-wrap-off-state): not
857: conforming; turns off the rendering of wrapping but otherwise acts
858: like 'soft' --><p>The <dfn id="attr-textarea-maxlength" title="attr-textarea-maxlength"><code>maxlength</code></dfn>
859: 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
860: <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
861: value length</a>, then the element's children must be such that
862: the <a href="#code-point-length">code-point length</a> of the value of the element's
863: <code>textContent</code> IDL attribute is equal to or less than the
864: 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
865: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. When specified, the user will
866: 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>
867: attribute represents a hint (a word or short phrase) intended to aid
868: the user with data entry. A hint could be a sample value or a brief
869: description of the expected format. The attribute, if specified,
870: must have a value that contains no U+000A LINE FEED (LF) or U+000D
871: 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>
872: attribute should not be used as an alternative to a
873: <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
874: explicitly associate the <code><a href="#the-textarea-element">textarea</a></code> element with its
875: <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>
876: 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
877: the control non-interactive and to prevent its value from being
878: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
879: attribute controls focus.</p><dl class="domintro"><dt><var title="">textarea</var> . <code title="attr-textarea-type">type</code></dt>
880:
881: <dd>
882:
883: <p>Returns the string "<code title="">textarea</code>".</p>
884:
885: </dd>
886:
887: <dt><var title="">textarea</var> . <code title="attr-textarea-value">value</code></dt>
888:
889: <dd>
890:
891: <p>Returns the current value of the element.</p>
892:
893: <p>Can be set, to change the value.</p>
894:
895: </dd>
896:
897: </dl><div class="example">
898:
899: <p>Here is an example of a <code><a href="#the-textarea-element">textarea</a></code> being used for
900: unrestricted free-form text input in a form:</p>
901:
902: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments></textarea></p></pre>
903:
904: </div><h4 id="the-keygen-element"><span class="secno">4.10.12 </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>
905: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
906: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
907: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
908: <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>
909: <dt>Contexts in which this element may be used:</dt>
910: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
911: <dt>Content model:</dt>
912: <dd>Empty.</dd>
913: <dt>Content attributes:</dt>
914: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
915: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
916: <dd><code title="attr-keygen-challenge"><a href="#attr-keygen-challenge">challenge</a></code></dd>
917: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
918: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
919: <dd><code title="attr-keygen-keytype"><a href="#attr-keygen-keytype">keytype</a></code></dd>
920: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
921: <dt>DOM interface:</dt>
922: <dd>
923: <pre class="idl">interface <dfn id="htmlkeygenelement">HTMLKeygenElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
924: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
925: attribute DOMString <a href="#dom-keygen-challenge" title="dom-keygen-challenge">challenge</a>;
926: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
927: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
928: attribute DOMString <a href="#dom-keygen-keytype" title="dom-keygen-keytype">keytype</a>;
929: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
930:
931: readonly attribute DOMString <a href="#dom-keygen-type" title="dom-keygen-type">type</a>;
932:
933: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
934: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
935: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
936: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
937: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
938:
939: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
940: };</pre>
941: </dd>
942: </dl><p>The <code><a href="#the-keygen-element">keygen</a></code> element <a href="#represents">represents</a> a key
943: pair generator control. When the control's form is submitted, the
944: private key is stored in the local keystore, and the public key is
945: packaged and sent to the server.</p><p>The <dfn id="attr-keygen-challenge" title="attr-keygen-challenge"><code>challenge</code></dfn> attribute
946: may be specified. Its value will be packaged with the submitted
947: key.</p><p>The <dfn id="attr-keygen-keytype" title="attr-keygen-keytype"><code>keytype</code></dfn>
948: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following
949: table lists the keywords and states for the attribute — the
950: keywords in the left column map to the states listed in the cell in
951: the second column on the same row as the keyword. User agents are
952: not required to support these values, and must only recognise values
953: whose corresponding algorithms they support.</p><table><thead><tr><th> Keyword </th><th> State
954: </th></tr></thead><tbody><tr><td> <code title="">rsa</code>
955: </td><td> <i title="">RSA</i>
956: <!-- v2 (see below)
957: <tr>
958: <td> <code title="">ec</code>
959: <td> <i title="">EC</i>
960: -->
961: </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
962: 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
963: user agents are to support — it is possible for a user agent
964: 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
965: explicitly associate the <code><a href="#the-keygen-element">keygen</a></code> element with its
966: <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>
967: 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
968: the control non-interactive and to prevent its value from being
969: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
970: attribute controls focus.</p><dl class="domintro"><dt><var title="">keygen</var> . <code title="attr-keygen-type">type</code></dt>
971:
972: <dd>
973:
974: <p>Returns the string "<code title="">keygen</code>".</p>
975:
976: </dd>
977:
978: </dl><p class="note">This specification does not specify how the private
979: key generated is to be used. It is expected that after receiving the
980: <code><a href="#signedpublickeyandchallenge">SignedPublicKeyAndChallenge</a></code> (SPKAC) structure, the
981: server will generate a client certificate and offer it back to the
982: user for download; this certificate, once downloaded and stored in
983: the key store along with the private key, can then be used to
984: authenticate to services that use SSL and certificate
985: authentication.</p><!-- how does the UA know which private key is associated with a
986: certificate it gets back after the server has taken the public key
987: created by <keygen> and turned it into a client cert? --><div class="example">
988:
989: <p>To generate a key pair, add the private key to the user's key
990: store, and submit the public key to the server, markup such as the
991: following can be used:</p>
992:
993: <pre><form action="processkey.cgi" method="post" enctype="multipart/formdata">
994: <p><keygen name="key"></p>
995: <p><input type=submit value="Submit key..."></p>
996: </form></pre>
997:
998: <p>The server will then receive a form submission with a packaged
999: RSA public key as the value of "<code title="">key</code>". This
1000: can then be used for various purposes, such as generating a client
1001: certificate, as mentioned above.</p>
1002:
1003: </div><h4 id="the-output-element"><span class="secno">4.10.13 </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>
1004: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1005: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1.11 mike 1006: <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 1007: <dt>Contexts in which this element may be used:</dt>
1008: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1009: <dt>Content model:</dt>
1010: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1011: <dt>Content attributes:</dt>
1012: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1013: <dd><code title="attr-output-for"><a href="#attr-output-for">for</a></code></dd>
1014: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1015: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
1016: <dt>DOM interface:</dt>
1017: <dd>
1018: <pre class="idl">interface <dfn id="htmloutputelement">HTMLOutputElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.12 mike 1019: [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 1020: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
1021: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
1022:
1023: readonly attribute DOMString <a href="#dom-output-type" title="dom-output-type">type</a>;
1024: attribute DOMString <a href="#dom-output-defaultvalue" title="dom-output-defaultValue">defaultValue</a>;
1025: attribute DOMString <a href="#dom-output-value" title="dom-output-value">value</a>;
1026:
1027: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
1028: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
1029: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
1030: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
1031: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
1.11 mike 1032:
1033: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
1.9 mike 1034: };</pre>
1035: </dd>
1036: </dl><p>The <code><a href="#the-output-element">output</a></code> element <a href="#represents">represents</a> the result of a
1037: calculation.</p><p>The <dfn id="attr-output-for" title="attr-output-for"><code>for</code></dfn> content
1038: attribute allows an explicit relationship to be made between the
1039: result of a calculation and the elements that represent the values
1040: that went into the calculation or that otherwise influenced the
1041: calculation. The <code title="attr-output-for"><a href="#attr-output-for">for</a></code> attribute,
1042: if specified, must contain a string consisting of an <a href="common-microsyntaxes.html#unordered-set-of-unique-space-separated-tokens">unordered
1043: set of unique space-separated tokens</a>, each of which must have
1044: the value of an ID of an element in the same
1045: <code>Document</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
1046: explicitly associate the <code><a href="#the-output-element">output</a></code> element with its
1047: <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>
1048: 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>
1049:
1050: <dd>
1051:
1052: <p>Returns the element's current value.</p>
1053:
1054: <p>Can be set, to change the value.</p>
1055:
1056: </dd>
1057:
1058: <dt><var title="">output</var> . <code title="dom-output-defaultValue"><a href="#dom-output-defaultvalue">defaultValue</a></code> [ = <var title="">value</var> ]</dt>
1059:
1060: <dd>
1061:
1062: <p>Returns the element's current default value.</p>
1063:
1064: <p>Can be set, to change the default value.</p>
1065:
1066: </dd>
1067:
1068: <dt><var title="">output</var> . <code title="dom-output-type"><a href="#dom-output-type">type</a></code></dt>
1069:
1070: <dd>
1071:
1072: <p>Returns the string "<code title="">output</code>".</p>
1073:
1074: </dd>
1075:
1076: </dl><div class="example">
1077:
1078: <p>A simple calculator could use <code><a href="#the-output-element">output</a></code> for its
1079: display of calculated results:</p>
1080:
1081: <pre><form onsubmit="return false">
1082: <input name=a type=number step=any> +
1083: <input name=b type=number step=any> =
1084: <output onforminput="value = a.value + b.value"></output>
1085: </form></pre>
1086:
1.11 mike 1087: </div><h4 id="the-progress-element"><span class="secno">4.10.14 </span>The <dfn><code>progress</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
1088: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1089: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1090: <dd><a href="forms.html#category-label" title="category-label">Labelable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
1091: <dt>Contexts in which this element may be used:</dt>
1092: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1093: <dt>Content model:</dt>
1094: <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>
1095: <dt>Content attributes:</dt>
1096: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1097: <dd><code title="attr-progress-value"><a href="#attr-progress-value">value</a></code></dd>
1098: <dd><code title="attr-progress-max"><a href="#attr-progress-max">max</a></code></dd>
1099: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1100: <dt>DOM interface:</dt>
1101: <dd>
1102: <pre class="idl">interface <dfn id="htmlprogresselement">HTMLProgressElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1103: attribute float <a href="#dom-progress-value" title="dom-progress-value">value</a>;
1104: attribute float <a href="#dom-progress-max" title="dom-progress-max">max</a>;
1105: readonly attribute float <a href="#dom-progress-position" title="dom-progress-position">position</a>;
1106: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
1107: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
1108: };</pre>
1109: </dd>
1110: </dl><p>The <code><a href="#the-progress-element">progress</a></code> element <a href="#represents">represents</a> the
1111: completion progress of a task. The progress is either indeterminate,
1112: indicating that progress is being made but that it is not clear how
1113: much more work remains to be done before the task is complete
1114: (e.g. because the task is waiting for a remote host to respond), or
1115: the progress is a number in the range zero to a maximum, giving the
1116: fraction of work that has so far been completed.</p><p>There are two attributes that determine the current task
1117: completion represented by the element.</p><p>The <dfn id="attr-progress-value" title="attr-progress-value"><code>value</code></dfn>
1118: attribute specifies how much of the task has been completed, and the
1119: <dfn id="attr-progress-max" title="attr-progress-max"><code>max</code></dfn> attribute
1120: specifies how much work the task requires in total. The units are
1121: arbitrary and not specified.</p><p>Authors are encouraged to also include the current value and the
1122: maximum value inline as text inside the element, so that the
1123: progress is made available to users of legacy user agents.</p><div class="example">
1124: <p>Here is a snippet of a Web application that shows the progress
1125: of some automated task:</p>
1126: <pre><section>
1127: <h2>Task Progress</h2>
1128: <p>Progress: <progress id="p" max=100><span>0</span>%</progress></p>
1129: <script>
1130: var progressBar = document.getElementById('p');
1131: function updateProgress(newValue) {
1132: progressBar.value = newValue;
1133: progressBar.getElementsByTagName('span')[0].textContent = newValue;
1134: }
1135: </script>
1136: </section></pre>
1137: <p>(The <code>updateProgress()</code> method in this example would
1138: be called by some other code on the page to update the actual
1139: progress bar as the task progressed.)</p>
1140: </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
1141: have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" title="valid floating point number">valid
1142: floating point numbers</a>. The <code title="attr-progress-value"><a href="#attr-progress-value">value</a></code> attribute, if present, must
1143: have a value equal to or greater than zero, and less than or equal
1144: to the value of the <code title="attr-progress-max"><a href="#attr-progress-max">max</a></code>
1145: 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
1146: have a value greater than zero.</p><p class="note">The <code><a href="#the-progress-element">progress</a></code> element is the wrong
1147: element to use for something that is just a gauge, as opposed to
1148: task progress. For instance, indicating disk space usage using
1149: <code><a href="#the-progress-element">progress</a></code> would be inappropriate. Instead, the
1150: <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>
1151:
1152: <dd>
1153:
1154: <p>For a determinate progress bar (one with known current and
1155: maximum values), returns the result of dividing the current value
1156: by the maximum value.</p>
1157:
1158: <p>For an indeterminate progress bar, returns −1.</p>
1159:
1160: </dd></dl><h4 id="the-meter-element"><span class="secno">4.10.15 </span>The <dfn><code>meter</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><!-- Keep this after <progress> and NOT close to <time> --><dl class="element"><dt>Categories</dt>
1161: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1162: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1163: <dd><a href="forms.html#category-label" title="category-label">Labelable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
1164: <dt>Contexts in which this element may be used:</dt>
1165: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1166: <dt>Content model:</dt>
1167: <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>
1168: <dt>Content attributes:</dt>
1169: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1170: <dd><code title="attr-meter-value"><a href="#attr-meter-value">value</a></code></dd>
1171: <dd><code title="attr-meter-min"><a href="#attr-meter-min">min</a></code></dd>
1172: <dd><code title="attr-meter-max"><a href="#attr-meter-max">max</a></code></dd>
1173: <dd><code title="attr-meter-low"><a href="#attr-meter-low">low</a></code></dd>
1174: <dd><code title="attr-meter-high"><a href="#attr-meter-high">high</a></code></dd>
1175: <dd><code title="attr-meter-optimum"><a href="#attr-meter-optimum">optimum</a></code></dd>
1176: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1177: <dt>DOM interface:</dt>
1178: <dd>
1179: <pre class="idl">interface <dfn id="htmlmeterelement">HTMLMeterElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1180: attribute float <a href="#dom-meter-value" title="dom-meter-value">value</a>;
1181: attribute float <a href="#dom-meter-min" title="dom-meter-min">min</a>;
1182: attribute float <a href="#dom-meter-max" title="dom-meter-max">max</a>;
1183: attribute float <a href="#dom-meter-low" title="dom-meter-low">low</a>;
1184: attribute float <a href="#dom-meter-high" title="dom-meter-high">high</a>;
1185: attribute float <a href="#dom-meter-optimum" title="dom-meter-optimum">optimum</a>;
1186: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
1187: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
1188: };</pre>
1189: </dd>
1190: </dl><p>The <code><a href="#the-meter-element">meter</a></code> element <a href="#represents">represents</a> a scalar
1191: measurement within a known range, or a fractional value; for example
1192: disk usage, the relevance of a query result, or the fraction of a
1193: 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
1194: indicate progress (as in a progress bar). For that role, HTML
1195: 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
1196: represent a scalar value of arbitrary range — for example, it
1197: would be wrong to use this to report a weight, or height, unless
1198: there is a known maximum value.</p><p>There are six attributes that determine the semantics of the
1199: gauge represented by the element.</p><p>The <dfn id="attr-meter-min" title="attr-meter-min"><code>min</code></dfn> attribute
1200: specifies the lower bound of the range, and the <dfn id="attr-meter-max" title="attr-meter-max"><code>max</code></dfn> attribute specifies
1201: the upper bound. The <dfn id="attr-meter-value" title="attr-meter-value"><code>value</code></dfn> attribute
1202: specifies the value to have the gauge indicate as the "measured"
1203: value.</p><p>The other three attributes can be used to segment the gauge's
1204: range into "low", "medium", and "high" parts, and to indicate which
1205: part of the gauge is the "optimum" part. The <dfn id="attr-meter-low" title="attr-meter-low"><code>low</code></dfn> attribute specifies
1206: 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
1207: 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
1208: gives the position that is "optimum"; if that is higher than the
1209: "high" value then this indicates that the higher the value, the
1210: better; if it's lower than the "low" mark then it indicates that
1211: lower values are better, and naturally if it is in between then it
1.13 mike 1212: 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 1213: 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,
1214: must have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" title="valid floating point
1215: 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
1216: attribute is specified, then let <var title="">minimum</var> be that
1217: 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
1218: attribute is specified, then let <var title="">maximum</var> be that
1219: 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>
1220: <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>
1221: <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>
1222: <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>
1223: </ul><p>If both the <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> attributes are specified, then
1224: the <code title="attr-meter-low"><a href="#attr-meter-low">low</a></code> attribute's value must
1225: be less than or equal to the value of the <code title="attr-meter-high"><a href="#attr-meter-high">high</a></code> attribute.</p><p class="note">If no minimum or maximum is specified, then the
1226: range is assumed to be 0..1, and the value thus has to be within
1227: that range.</p><p>Authors are encouraged to include a textual representation of the
1228: gauge's state in the element's contents, for users of user agents
1229: that do not support the <code><a href="#the-meter-element">meter</a></code> element.</p><div class="example">
1230:
1231: <p>The following examples show three gauges that would all be
1232: three-quarters full:</p>
1233:
1234: <pre>Storage space usage: <meter value=6 max=8>6 blocks used (out of 8 total)</meter>
1235: Voter turnout: <meter value=0.75><img alt="75%" src="graph75.png"></meter>
1236: Tickets sold: <meter min="0" max="100" value="75"></meter></pre>
1237:
1238: <p>The following example is incorrect use of the element, because
1239: it doesn't give a range (and since the default maximum is 1, both
1240: of the gauges would end up looking maxed out):</p>
1241:
1242: <pre class="bad"><p>The grapefruit pie had a radius of <meter value=12>12cm</meter>
1243: and a height of <meter value=2>2cm</meter>.</p> <!-- <strong>BAD!</strong> --></pre>
1244:
1245: <p>Instead, one would either not include the meter element, or use
1246: the meter element with a defined range to give the dimensions in
1247: context compared to other pies:</p>
1248:
1249: <pre><p>The grapefruit pie had a radius of 12cm and a height of
1250: 2cm.</p>
1251: <dl>
1252: <dt>Radius: <dd> <meter min=0 max=20 value=12>12cm</meter>
1253: <dt>Height: <dd> <meter min=0 max=10 value=2>2cm</meter>
1254: </dl></pre>
1255:
1256: </div><p>There is no explicit way to specify units in the
1257: <code><a href="#the-meter-element">meter</a></code> element, but the units may be specified in the
1258: <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute in free-form text.</p><div class="example">
1259:
1260: <p>The example above could be extended to mention the units:</p>
1261:
1262: <pre><dl>
1263: <dt>Radius: <dd> <meter min=0 max=20 value=12 title="centimeters">12cm</meter>
1264: <dt>Height: <dd> <meter min=0 max=10 value=2 title="centimeters">2cm</meter>
1265: </dl></pre>
1266:
1267: </div><div class="example">
1268: <p>The following markup:</p>
1269: <pre><h3>Suggested groups</h3>
1270: <menu type="toolbar">
1271: <a href="?cmd=hsg" onclick="hideSuggestedGroups()">Hide suggested groups</a>
1272: </menu>
1273: <ul>
1274: <li>
1275: <p><a href="/group/comp.infosystems.www.authoring.stylesheets/view">comp.infosystems.www.authoring.stylesheets</a> -
1276: <a href="/group/comp.infosystems.www.authoring.stylesheets/subscribe">join</a></p>
1277: <p>Group description: <strong>Layout/presentation on the WWW.</strong></p>
1278: <p><strong><meter value="0.5">Moderate activity,</meter></strong> Usenet, 618 subscribers</p>
1279: </li>
1280: <li>
1281: <p><a href="/group/netscape.public.mozilla.xpinstall/view">netscape.public.mozilla.xpinstall</a> -
1282: <a href="/group/netscape.public.mozilla.xpinstall/subscribe">join</a></p>
1283: <p>Group description: <strong>Mozilla XPInstall discussion.</strong></p>
1284: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 22 subscribers</p>
1285: </li>
1286: <li>
1287: <p><a href="/group/mozilla.dev.general/view">mozilla.dev.general</a> -
1288: <a href="/group/mozilla.dev.general/subscribe">join</a></p>
1289: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 66 subscribers</p>
1290: </li>
1291: </ul></pre>
1292: <p>Might be rendered as follows:</p>
1293: <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 1294: </div><p>User agents combine the value of
1295: the <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute and the other
1.11 mike 1296: attributes to provide context-sensitive help or inline text
1297: detailing the actual values.</p><div class="example">
1298: <p>For example, the following snippet:</p>
1299: <pre><meter min=0 max=60 value=23.2 title=seconds></meter></pre>
1300: <p>...might cause the user agent to display a gauge with a tooltip
1301: saying "Value: 23.2 out of 60." on one line and "seconds" on a
1302: second line.</p>
1303: </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
1304: explicitly associate the <code><a href="#the-meter-element">meter</a></code> element with its
1305: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>.</p><p><strong>Constraint validation</strong>: <code><a href="#the-meter-element">meter</a></code>
1306: elements are always <a href="#barred-from-constraint-validation">barred from constraint
1307: validation</a>.</p><div class="example">
1308:
1309: <p>The following example shows how a gauge could fall back to
1310: localized or pretty-printed text.</p>
1311:
1312: <pre><p>Disk usage: <meter min=0 value=170261928 max=233257824>170 261 928 bytes used
1313: out of 233 257 824 bytes available</meter></p></pre>
1314:
1.9 mike 1315: </div></body></html>
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