Annotation of html5/spec-author-view/the-button-element.html, revision 1.138
1.55 mike 1: <!DOCTYPE html><!-- when publishing, change bits marked ZZZ --><html class="split chapter" lang="en-US-x-Hixie"><head><meta content="text/html; charset=UTF-8" http-equiv="Content-Type"><title>4.10.8 The button element — HTML5 (Edition for Web Authors)</title><link href="whatwg.css" rel="stylesheet"><style type="text/css">
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1.23 mike 46: dl.domintro { color: green; margin: 2em 0 2em 2em; padding: 0.5em 1em; border: none; background: #DDFFDD; }
1.1 mike 47: hr + dl.domintro, div.impl + dl.domintro { margin-top: 2.5em; margin-bottom: 1.5em; }
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1.1 mike 117:
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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;
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178:
1.1 mike 179: #configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
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183: #configUI input[type=button] { display: block; margin: auto; }
1.121 mike 184:
1.1 mike 185: </style><style type="text/css">
186:
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1.136 mike 193: .matrix, .matrix td { border: hidden; text-align: right; }
1.1 mike 194: .matrix { margin-left: 2em; }
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1.9 mike 226: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
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229:
1.11 mike 230: .details-example img { vertical-align: top; }
231:
1.26 mike 232: #named-character-references-table {
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243:
1.35 mike 244: .glyph.control { color: red; }
245:
1.38 mike 246: @font-face {
247: font-family: 'Essays1743';
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250: @font-face {
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265: }
266:
1.25 mike 267: </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 268: function getCookie(name) {
269: var params = location.search.substr(1).split("&");
270: for (var index = 0; index < params.length; index++) {
271: if (params[index] == name)
272: return "1";
273: var data = params[index].split("=");
274: if (data[0] == name)
275: return unescape(data[1]);
276: }
277: var cookies = document.cookie.split("; ");
278: for (var index = 0; index < cookies.length; index++) {
279: var data = cookies[index].split("=");
280: if (data[0] == name)
281: return unescape(data[1]);
282: }
283: return null;
284: }
285: function load(script) {
286: var e = document.createElement('script');
287: e.setAttribute('src', 'http://www.whatwg.org/specs/web-apps/current-work/' + script + '?' + encodeURIComponent(location) + '&' + encodeURIComponent(document.referrer));
288: document.body.appendChild(e);
289: }
290: function init() {
291: if (location.search == '?slow-browser')
292: return;
293: var configUI = document.createElement('div');
294: configUI.id = 'configUI';
295: document.body.appendChild(configUI);
296: // load('reviewer.js'); // would need cross-site XHR
297: if (document.getElementById('head'))
298: load('toc.js');
299:
300: // load('updater.js'); // would need cross-site XHR
1.11 mike 301: load('dfn.js'); // doesn't support split-out specs, but, oh well.
1.9 mike 302: // load('status.js'); // would need cross-site XHR
303: if (getCookie('profile') == '1')
304: document.getElementsByTagName('h2')[0].textContent += '; load: ' + (new Date() - loadTimer) + 'ms';
305: fixBrokenLink();
306: }
1.54 mike 307: </script><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><link href="style.css" rel="stylesheet"><script src="link-fixup.js"></script><link href="common-input-element-attributes.html" rel="prev" title="4.10.7.2 Common input element attributes">
1.48 mike 308: <link href="Overview.html#contents" rel="index" title="Table of contents">
309: <link href="association-of-controls-and-forms.html" rel="next" title="4.10.18 Association of controls and forms">
310: <body onload="fixBrokenLink(); init()"><div class="head" id="head">
1.9 mike 311: <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 312:
1.138 ! mike 313: <h1>HTML5 (Edition for Web Authors)<span class="rcsrevision"> revision 1.4209</span></h1>
1.9 mike 314: </div><div>
1.48 mike 315: <a href="common-input-element-attributes.html">← 4.10.7.2 Common input element attributes</a> –
316: <a href="Overview.html#contents">Table of contents</a> –
317: <a href="association-of-controls-and-forms.html">4.10.18 Association of controls and forms →</a>
318: <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><a href="the-button-element.html#the-select-element"><span class="secno">4.10.9 </span>The <code>select</code> element</a><li><a href="the-button-element.html#the-datalist-element"><span class="secno">4.10.10 </span>The <code>datalist</code> element</a><li><a href="the-button-element.html#the-optgroup-element"><span class="secno">4.10.11 </span>The <code>optgroup</code> element</a><li><a href="the-button-element.html#the-option-element"><span class="secno">4.10.12 </span>The <code>option</code> element</a><li><a href="the-button-element.html#the-textarea-element"><span class="secno">4.10.13 </span>The <code>textarea</code> element</a><li><a href="the-button-element.html#the-keygen-element"><span class="secno">4.10.14 </span>The <code>keygen</code> element</a><li><a href="the-button-element.html#the-output-element"><span class="secno">4.10.15 </span>The <code>output</code> element</a><li><a href="the-button-element.html#the-progress-element"><span class="secno">4.10.16 </span>The <code>progress</code> element</a><li><a href="the-button-element.html#the-meter-element"><span class="secno">4.10.17 </span>The <code>meter</code> element</a></ol></ol></ol></div>
1.9 mike 319:
1.48 mike 320: <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><dl class="element"><dt>Categories</dt>
1.9 mike 321: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
322: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
323: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
324: <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>
325: <dt>Contexts in which this element may be used:</dt>
326: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
327: <dt>Content model:</dt>
328: <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>
329: <dt>Content attributes:</dt>
330: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
331: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
332: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
333: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
334: <dd><code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code></dd>
335: <dd><code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code></dd>
336: <dd><code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code></dd>
337: <dd><code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code></dd>
338: <dd><code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code></dd>
339: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
340: <dd><code title="attr-button-type"><a href="#attr-button-type">type</a></code></dd>
341: <dd><code title="attr-button-value"><a href="#attr-button-value">value</a></code></dd>
342: <dt>DOM interface:</dt>
343: <dd>
344: <pre class="idl">interface <dfn id="htmlbuttonelement">HTMLButtonElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 345: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
346: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
347: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
348: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formaction" title='Read about this "formAction" reference in the full HTML5 spec.'>formAction</a>;
349: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formenctype" title='Read about this "formEnctype" reference in the full HTML5 spec.'>formEnctype</a>;
350: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formmethod" title='Read about this "formMethod" reference in the full HTML5 spec.'>formMethod</a>;
351: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formnovalidate" title='Read about this "formNoValidate" reference in the full HTML5 spec.'>formNoValidate</a>;
352: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formtarget" title='Read about this "formTarget" reference in the full HTML5 spec.'>formTarget</a>;
353: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
354: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-button-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
355: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-button-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
356:
357: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
358: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
359: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
360: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
361: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.9 mike 362:
1.48 mike 363: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 364: };</pre>
365: </dd>
1.48 mike 366: </dl><p>The <code><a href="#the-button-element">button</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a
367: button. <p>The element is a <a href="forms.html#concept-button" title="concept-button">button</a>.<p>The <dfn id="attr-button-type" title="attr-button-type"><code>type</code></dfn>
1.9 mike 368: attribute controls the behavior of the button when it is activated.
369: It is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following table
1.48 mike 370: lists the keywords and states for the attribute — the keywords
1.9 mike 371: in the left column map to the states in the cell in the second
1.48 mike 372: column on the same row as the keyword.<table><thead><tr><th> Keyword
373: <th> State
374: <th> Brief description
375: <tbody><tr><td><dfn id="attr-button-type-submit" title="attr-button-type-submit"><code>submit</code></dfn>
376: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
377: <td>Submits the form.
378: <tr><td><dfn id="attr-button-type-reset" title="attr-button-type-reset"><code>reset</code></dfn>
379: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-reset-state" title='Read about this "Reset Button" reference in the full HTML5 spec.'>Reset Button</a>
380: <td>Resets the form.
381: <tr><td><dfn id="attr-button-type-button" title="attr-button-type-button"><code>button</code></dfn>
382: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-button-state" title='Read about this "Button" reference in the full HTML5 spec.'>Button</a>
383: <td>Does nothing.
384: </table><p>The <i>missing value default</i> is the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
385: state.<p>If the <code title="attr-button-type"><a href="#attr-button-type">type</a></code> attribute is in
386: the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
387: state, the element is specifically a <a href="forms.html#concept-submit-button" title="concept-submit-button">submit button</a>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
1.9 mike 388: explicitly associate the <code><a href="#the-button-element">button</a></code> element with its
389: <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>
390: 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
391: the control non-interactive and to prevent its value from being
392: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
393: 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
1.48 mike 394: <a href="association-of-controls-and-forms.html#attributes-for-form-submission">attributes for form submission</a>.<p class="note">The <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code> attribute can
1.9 mike 395: be used to make submit buttons that do not trigger the constraint
1.48 mike 396: validation.<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
1.15 mike 397: if the element's <code title="attr-button-type"><a href="#attr-button-type">type</a></code>
1.48 mike 398: attribute is not in the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
399: state.<p>The <dfn id="attr-button-value" title="attr-button-value"><code>value</code></dfn>
1.9 mike 400: attribute gives the element's value for the purposes of form
1.48 mike 401: submission. The element's <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#concept-fe-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a> is the value of the element's
1.10 mike 402: <code title="attr-button-value"><a href="#attr-button-value">value</a></code> attribute, if there is
1.48 mike 403: one, or the empty string otherwise.<p class="note">A button (and its value) is only included in the
1.9 mike 404: form submission if the button itself was used to initiate the form
1.48 mike 405: submission.<div class="example">
1.9 mike 406:
407: <p>The following button is labeled "Show hint" and pops up a dialog
408: box when activated:</p>
409:
410: <pre><button type=button
411: onclick="alert('This 15-20 minute piece was composed by George Gershwin.')">
412: Show hint
413: </button></pre>
414:
1.48 mike 415: </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><dl class="element"><dt>Categories</dt>
1.9 mike 416: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
417: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
418: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
419: <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>
420: <dt>Contexts in which this element may be used:</dt>
421: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
422: <dt>Content model:</dt>
423: <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>
424: <dt>Content attributes:</dt>
425: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
426: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
427: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
428: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
429: <dd><code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code></dd>
430: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
1.138 ! mike 431: <dd><code title="attr-select-required"><a href="#attr-select-required">required</a></code></dd>
1.9 mike 432: <dd><code title="attr-select-size"><a href="#attr-select-size">size</a></code></dd>
433: <dt>DOM interface:</dt>
434: <dd>
435: <pre class="idl">interface <dfn id="htmlselectelement">HTMLSelectElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 436: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
437: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
438: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
439: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-multiple" title='Read about this "multiple" reference in the full HTML5 spec.'>multiple</a>;
440: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
1.138 ! mike 441: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/.html#dom-select-required" title='Read about this "required" reference in the full HTML5 spec.'>required</a>;
1.48 mike 442: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-size" title='Read about this "size" reference in the full HTML5 spec.'>size</a>;
443:
444: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
445:
446: readonly attribute <a href="urls.html#htmloptionscollection">HTMLOptionsCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a>;
447: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-length" title='Read about this "length" reference in the full HTML5 spec.'>length</a>;
448: caller getter any <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-item" title='Read about this "item" reference in the full HTML5 spec.'>item</a>(in unsigned long index);
449: caller getter any <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-nameditem" title='Read about this "namedItem" reference in the full HTML5 spec.'>namedItem</a>(in DOMString name);
450: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-add" title='Read about this "add" reference in the full HTML5 spec.'>add</a>(in <a href="elements.html#htmlelement">HTMLElement</a> element, in optional <a href="elements.html#htmlelement">HTMLElement</a> before);
451: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-add" title='Read about this "add" reference in the full HTML5 spec.'>add</a>(in <a href="elements.html#htmlelement">HTMLElement</a> element, in long before);
452: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-remove" title='Read about this "remove" reference in the full HTML5 spec.'>remove</a>(in long index);
453:
454: readonly attribute <a href="urls.html#htmlcollection">HTMLCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedoptions" title='Read about this "selectedOptions" reference in the full HTML5 spec.'>selectedOptions</a>;
455: attribute long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedindex" title='Read about this "selectedIndex" reference in the full HTML5 spec.'>selectedIndex</a>;
456: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
457:
458: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
459: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
460: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
461: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
462: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.9 mike 463:
1.48 mike 464: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 465: };</pre>
466: </dd>
467: </dl><!-- Proposals for v2:
468: * <select value=""> as an alternative to <option selected>
469: http://developers.slashdot.org/comments.pl?sid=426306&cid=22142072
1.11 mike 470: <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 471: src="/js/flightcity.js"></SCRIPT></select> which is the kind of thing that could be much simpler with <select value="PEK">
472: --><p>The <code><a href="#the-select-element">select</a></code> element represents a control for
1.48 mike 473: selecting amongst a set of options.<p>The <dfn id="attr-select-multiple" title="attr-select-multiple"><code>multiple</code></dfn>
1.9 mike 474: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. If the attribute is
475: present, then the <code><a href="#the-select-element">select</a></code> element
1.48 mike 476: <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a control for selecting zero or more options
1.9 mike 477: from the <a href="#concept-select-option-list" title="concept-select-option-list">list of
478: options</a>. If the attribute is absent, then the
1.48 mike 479: <code><a href="#the-select-element">select</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a control for
1.138 ! mike 480: selecting a single option from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.<p>The <dfn id="attr-select-size" title="attr-select-size"><code>size</code></dfn>
1.9 mike 481: 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
482: have a value that is a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a>
483: greater than zero. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is present,
484: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
485: default value is 4. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is absent,
486: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
1.138 ! mike 487: default value is 1.<p>The <dfn id="concept-select-option-list" title="concept-select-option-list">list of options</dfn>
! 488: for a <code><a href="#the-select-element">select</a></code> element consists of all the
! 489: <code><a href="#the-option-element">option</a></code> element children of the <code><a href="#the-select-element">select</a></code>
! 490: element, and all the <code><a href="#the-option-element">option</a></code> element children of all the
! 491: <code><a href="#the-optgroup-element">optgroup</a></code> element children of the <code><a href="#the-select-element">select</a></code>
! 492: element, in <a href="infrastructure.html#tree-order">tree order</a>.<p>The <dfn id="attr-select-required" title="attr-select-required"><code>required</code></dfn>
! 493: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. When specified, the
! 494: user will be required to select a value before submitting the
! 495: form.<p>If a <code><a href="#the-select-element">select</a></code> element has a <code title="attr-select-required"><a href="#attr-select-required">required</a></code> attribute specified,
! 496: does not have a <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
! 497: attribute specified, and has a <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-select-size" title='Read about this "display size" reference in the full HTML5 spec.'>display size</a> of 1; and if the
! 498: <a href="#concept-option-value" title="concept-option-value">value</a> of the first
! 499: <code><a href="#the-option-element">option</a></code> element in the <code><a href="#the-select-element">select</a></code> element's
! 500: <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> (if
! 501: any) is the empty string, and that <code><a href="#the-option-element">option</a></code> is not <a href="#concept-option-disabled" title="concept-option-disabled">disabled</a>, and, finally, that
! 502: <code><a href="#the-option-element">option</a></code> element's parent node is the <code><a href="#the-select-element">select</a></code>
! 503: element (and not an <code><a href="#the-optgroup-element">optgroup</a></code> element), then that
! 504: <code><a href="#the-option-element">option</a></code> is the <code><a href="#the-select-element">select</a></code> element's
! 505: <dfn id="placeholder-label-option">placeholder label option</dfn>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
1.9 mike 506: explicitly associate the <code><a href="#the-select-element">select</a></code> element with its
507: <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>
508: 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
509: the control non-interactive and to prevent its value from being
510: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
1.48 mike 511: attribute controls focus.<dl class="domintro"><dt><var title="">select</var> . <code title="dom-select-type"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a></code></dt>
1.9 mike 512:
513: <dd>
514:
515: <p>Returns "<code title="">select-multiple</code>" if the element
516: has a <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
517: attribute, and "<code title="">select-one</code>"
518: otherwise.</p>
519:
520: </dd>
521:
1.48 mike 522: <dt><var title="">select</var> . <code title="dom-select-options"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a></code></dt>
1.9 mike 523:
524: <dd>
525:
526: <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>
527:
528: </dd>
529:
1.48 mike 530: <dt><var title="">select</var> . <code title="dom-select-length"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-length" title='Read about this "length" reference in the full HTML5 spec.'>length</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 531: <dd>
532: <p>Returns the number of elements in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
533: <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>
534: <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>
535: </dd>
536:
1.48 mike 537: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-item" title='Read about this "item" reference in the full HTML5 spec.'>item</a></code>(<var title="">index</var>)</dt>
1.9 mike 538: <dt><var title="">select</var>[<var title="">index</var>]</dt>
539: <dt><var title="">select</var>(<var title="">index</var>)</dt>
540: <dd>
541: <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>
542: <p>Returns null if <var title="">index</var> is out of range.</p>
543: </dd>
544:
1.48 mike 545: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-item" title='Read about this "namedItem" reference in the full HTML5 spec.'>namedItem</a></code>(<var title="">name</var>)</dt>
1.9 mike 546: <dt><var title="">select</var>[<var title="">name</var>]</dt>
547: <dt><var title="">select</var>(<var title="">name</var>)</dt>
548: <dd>
1.28 mike 549: <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>
1.48 mike 550: <p>If there are multiple matching items, then a <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a></code> object containing all those elements is returned.</p>
1.9 mike 551: <p>Returns null if no element with that ID could be found.</p>
552: </dd>
553:
1.48 mike 554: <dt><var title="">select</var> . <code title="dom-select-add"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-add" title='Read about this "add" reference in the full HTML5 spec.'>add</a></code>(<var title="">element</var> [, <var title="">before</var> ])</dt>
1.9 mike 555: <dd>
556: <p>Inserts <var title="">element</var> before the node given by <var title="">before</var>.</p>
557: <p>The <var title="">before</var> argument can be a number, in
558: which case <var title="">element</var> is inserted before the item
559: with that number, or an element from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>, in
560: which case <var title="">element</var> is inserted before that
561: element.</p>
562: <p>If <var title="">before</var> is omitted, null, or a number out
563: of range, then <var title="">element</var> will be added at the
564: end of the list.</p>
565: <p>This method will throw a <code><a href="urls.html#hierarchy_request_err">HIERARCHY_REQUEST_ERR</a></code>
566: exception if <var title="">element</var> is an ancestor of the
567: 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
568: <code><a href="#the-optgroup-element">optgroup</a></code> element, then the method does nothing.</p>
569: </dd>
570:
1.48 mike 571: <dt><var title="">select</var> . <code title="dom-select-selectedOptions"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedoptions" title='Read about this "selectedOptions" reference in the full HTML5 spec.'>selectedOptions</a></code></dt>
1.9 mike 572:
573: <dd>
574:
575: <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
576: selected.</p>
577:
578: </dd>
579:
1.48 mike 580: <dt><var title="">select</var> . <code title="dom-select-selectedIndex"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedindex" title='Read about this "selectedIndex" reference in the full HTML5 spec.'>selectedIndex</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 581:
582: <dd>
583:
584: <p>Returns the index of the first selected item, if any, or
1.48 mike 585: −1 if there is no selected item.</p>
1.9 mike 586:
587: <p>Can be set, to change the selection.</p>
588:
589: </dd>
590:
1.48 mike 591: <dt><var title="">select</var> . <code title="dom-select-value"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 592:
593: <dd>
594:
1.48 mike 595: <p>Returns the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#concept-fe-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a> of the
1.9 mike 596: first selected item, if any, or the empty string if there is no
597: selected item.</p>
598:
599: <p>Can be set, to change the selection.</p>
600:
601: </dd>
602:
603: </dl><div class="example">
604:
605: <p>The following example shows how a <code><a href="#the-select-element">select</a></code> element
606: can be used to offer the user with a set of options from which the
607: user can select a single option. The default option is
608: preselected.</p>
609:
610: <pre><p>
611: <label for="unittype">Select unit type:</label>
612: <select id="unittype" name="unittype">
613: <option value="1"> Miner </option>
614: <option value="2"> Puffer </option>
615: <option value="3" selected> Snipey </option>
616: <option value="4"> Max </option>
617: <option value="5"> Firebot </option>
618: </select>
619: </p></pre>
620:
621: </div><div class="example">
622:
623: <p>Here, the user is offered a set of options from which he can
624: select any number. By default, all five options are selected.</p>
625:
626: <pre><p>
627: <label for="allowedunits">Select unit types to enable on this map:</label>
628: <select id="allowedunits" name="allowedunits" multiple>
629: <option value="1" selected> Miner </option>
630: <option value="2" selected> Puffer </option>
631: <option value="3" selected> Snipey </option>
632: <option value="4" selected> Max </option>
633: <option value="5" selected> Firebot </option>
634: </select>
635: </p></pre>
636:
1.48 mike 637: </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><dl class="element"><dt>Categories</dt>
1.9 mike 638: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
639: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
640: <dt>Contexts in which this element may be used:</dt>
641: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
642: <dt>Content model:</dt>
643: <dd>Either: <a href="content-models.html#phrasing-content">phrasing content</a>.</dd>
644: <dd>Or: Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
645: <dt>Content attributes:</dt>
646: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
647: <dt>DOM interface:</dt>
648: <dd>
649: <pre class="idl">interface <dfn id="htmldatalistelement">HTMLDataListElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 650: readonly attribute <a href="urls.html#htmlcollection">HTMLCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-datalist-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a>;
1.9 mike 651: };</pre>
652: </dd>
653: </dl><p>The <code><a href="#the-datalist-element">datalist</a></code> element represents a set of
654: <code><a href="#the-option-element">option</a></code> elements that represent predefined options for
655: other controls. The contents of the element represents fallback
656: content for legacy user agents, intermixed with <code><a href="#the-option-element">option</a></code>
657: elements that represent the predefined options. In the rendering,
1.48 mike 658: the <code><a href="#the-datalist-element">datalist</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a>
659: nothing.<p>The <code><a href="#the-datalist-element">datalist</a></code> element is hooked up to an
1.9 mike 660: <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
661: <code><a href="the-input-element.html#the-input-element">input</a></code> element. <!-- v2DATAGRID The
662: <code>datalist</code> element can also be used with a
663: <code>datagrid</code> element, as the source of autocompletion hints
664: for <code title="datagrid-type-editable">editable</code>
1.48 mike 665: cells. --><p>Each <code><a href="#the-option-element">option</a></code> element that is a descendant of the
1.9 mike 666: <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
667: 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>.
668:
1.48 mike 669: <dl class="domintro"><dt><var title="">datalist</var> . <code title="dom-datalist-options"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-datalist-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a></code></dt>
1.9 mike 670:
671: <dd>
672: <p>Returns an <code><a href="urls.html#htmlcollection">HTMLCollection</a></code> of the <code>options</code> elements of the table.</p>
673: </dd>
674:
1.48 mike 675: </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><dl class="element"><dt>Categories</dt>
1.9 mike 676: <dd>None.</dd>
677: <dt>Contexts in which this element may be used:</dt>
678: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
679: <dt>Content model:</dt>
680: <dd>Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
681: <dt>Content attributes:</dt>
682: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
683: <dd><code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled">disabled</a></code></dd>
684: <dd><code title="attr-optgroup-label"><a href="#attr-optgroup-label">label</a></code></dd>
685: <dt>DOM interface:</dt>
686: <dd>
687: <pre class="idl">interface <dfn id="htmloptgroupelement">HTMLOptGroupElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 688: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-optgroup-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
689: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-optgroup-label" title='Read about this "label" reference in the full HTML5 spec.'>label</a>;
1.9 mike 690: };</pre>
691: </dd>
1.48 mike 692: </dl><!-- v2: make optgroups selectable if they have a value. --><p>The <code><a href="#the-optgroup-element">optgroup</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a group of
693: <code><a href="#the-option-element">option</a></code> elements with a common label.<p>The element's group of <code><a href="#the-option-element">option</a></code> elements consists of
1.9 mike 694: the <code><a href="#the-option-element">option</a></code> elements that are children of the
1.48 mike 695: <code><a href="#the-optgroup-element">optgroup</a></code> element.<p>The <dfn id="attr-optgroup-disabled" title="attr-optgroup-disabled"><code>disabled</code></dfn> attribute
1.9 mike 696: 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
1.48 mike 697: <code><a href="#the-option-element">option</a></code> elements together.<p>The <dfn id="attr-optgroup-label" title="attr-optgroup-label"><code>label</code></dfn>
1.9 mike 698: attribute must be specified. Its value gives the name of the group,
1.48 mike 699: for the purposes of the user interface. <div class="example">
1.9 mike 700:
701: <p>The following snippet shows how a set of lessons from three
702: courses could be offered in a <code><a href="#the-select-element">select</a></code> drop-down
703: widget:</p>
704:
705: <pre><form action="courseselector.dll" method="get">
706: <p>Which course would you like to watch today?
707: <p><label>Course:
708: <select name="c">
709: <optgroup label="8.01 Physics I: Classical Mechanics">
710: <option value="8.01.1">Lecture 01: Powers of Ten
711: <option value="8.01.2">Lecture 02: 1D Kinematics
712: <option value="8.01.3">Lecture 03: Vectors
713: <optgroup label="8.02 Electricity and Magnestism">
714: <option value="8.02.1">Lecture 01: What holds our world together?
715: <option value="8.02.2">Lecture 02: Electric Field
716: <option value="8.02.3">Lecture 03: Electric Flux
717: <optgroup label="8.03 Physics III: Vibrations and Waves">
718: <option value="8.03.1">Lecture 01: Periodic Phenomenon
719: <option value="8.03.2">Lecture 02: Beats
720: <option value="8.03.3">Lecture 03: Forced Oscillations with Damping
721: </select>
722: </label>
1.55 mike 723: <p><input type=submit value="▶ Play">
1.9 mike 724: </form></pre>
725:
1.48 mike 726: </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><dl class="element"><dt>Categories</dt>
1.9 mike 727: <dd>None.</dd>
728: <dt>Contexts in which this element may be used:</dt>
729: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
730: <dd>As a child of a <code><a href="#the-datalist-element">datalist</a></code> element.</dd>
731: <dd>As a child of an <code><a href="#the-optgroup-element">optgroup</a></code> element.</dd>
732: <dt>Content model:</dt>
733: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
734: <dt>Content attributes:</dt>
735: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
736: <dd><code title="attr-option-disabled"><a href="#attr-option-disabled">disabled</a></code></dd>
737: <dd><code title="attr-option-label"><a href="#attr-option-label">label</a></code></dd>
738: <dd><code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code></dd>
739: <dd><code title="attr-option-value"><a href="#attr-option-value">value</a></code></dd>
740: <dt>DOM interface:</dt>
741: <dd>
1.48 mike 742: <pre class="idl">[NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(),
743: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-t" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text),
744: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-tv" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text, in DOMString value),
745: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-tvd" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected),
746: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-tvds" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected, in boolean selected)]
1.9 mike 747: interface <dfn id="htmloptionelement">HTMLOptionElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 748: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
749: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
750: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-label" title='Read about this "label" reference in the full HTML5 spec.'>label</a>;
751: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-defaultselected" title='Read about this "defaultSelected" reference in the full HTML5 spec.'>defaultSelected</a>;
752: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-selected" title='Read about this "selected" reference in the full HTML5 spec.'>selected</a>;
753: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1.9 mike 754:
1.48 mike 755: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-text" title='Read about this "text" reference in the full HTML5 spec.'>text</a>;
756: readonly attribute long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-index" title='Read about this "index" reference in the full HTML5 spec.'>index</a>;
1.9 mike 757: };</pre>
758: </dd>
1.48 mike 759: </dl><p>The <code><a href="#the-option-element">option</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> an option
1.9 mike 760: in a <code><a href="#the-select-element">select</a></code> element or as part of a list of suggestions
1.138 ! mike 761: in a <code><a href="#the-datalist-element">datalist</a></code> element.<p>In certain circumstances described in the definition of the
! 762: <code><a href="#the-select-element">select</a></code> element, an <code><a href="#the-option-element">option</a></code> element can be a
! 763: <code><a href="#the-select-element">select</a></code> element's <a href="#placeholder-label-option">placeholder label option</a>.
! 764: A <a href="#placeholder-label-option">placeholder label option</a> does not represent an actual
! 765: option, but instead represents a label for the <code><a href="#the-select-element">select</a></code>
! 766: control.<p>The <dfn id="attr-option-disabled" title="attr-option-disabled"><code>disabled</code></dfn>
1.9 mike 767: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. An
768: <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
769: 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
1.48 mike 770: present.<p>The <dfn id="attr-option-label" title="attr-option-label"><code>label</code></dfn>
1.9 mike 771: 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>
772: element is the value of the <code title="attr-option-label"><a href="#attr-option-label">label</a></code> attribute, if there is one,
1.48 mike 773: or the <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> of the element, if there isn't.<p>The <dfn id="attr-option-value" title="attr-option-value"><code>value</code></dfn>
1.9 mike 774: 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>
775: element is the value of the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute, if there is one,
1.48 mike 776: or the <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> of the element, if there isn't.<p>The <dfn id="attr-option-selected" title="attr-option-selected"><code>selected</code></dfn>
777: attribute represents the default <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-option-selectedness" title='Read about this "selectedness" reference in the full HTML5 spec.'>selectedness</a> of the
778: element.<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
1.33 mike 779: specified must not have more than one descendant <code><a href="#the-option-element">option</a></code>
780: element with its <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code>
1.48 mike 781: attribute set.<dl class="domintro"><dt><var title="">option</var> . <code title="dom-option-selected"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-selected" title='Read about this "selected" reference in the full HTML5 spec.'>selected</a></code></dt>
1.9 mike 782:
783: <dd>
784:
785: <p>Returns true if the element is selected, and false otherwise.</p>
786:
787: </dd>
788:
1.48 mike 789: <dt><var title="">option</var> . <code title="dom-option-index"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-index" title='Read about this "index" reference in the full HTML5 spec.'>index</a></code></dt>
1.9 mike 790:
791: <dd>
792:
793: <p>Returns the index of the element in its <code><a href="#the-select-element">select</a></code>
1.48 mike 794: element's <code title="dom-select-options"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a></code>
1.9 mike 795: list.</p>
796:
797: </dd>
798:
1.48 mike 799: <dt><var title="">option</var> . <code title="dom-option-form"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a></code></dt>
1.9 mike 800:
801: <dd>
802:
803: <p>Returns the element's <code><a href="forms.html#the-form-element">form</a></code> element, if any, or
804: null otherwise.</p>
805:
806: </dd>
807:
1.48 mike 808: <dt><var title="">option</var> . <code title="dom-option-text"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-text" title='Read about this "text" reference in the full HTML5 spec.'>text</a></code></dt>
1.11 mike 809:
810: <dd>
811:
1.48 mike 812: <p>Same as <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code>.</p>
1.11 mike 813:
814: </dd>
815:
1.48 mike 816: <dt><var title="">option</var> = new <code title="dom-option"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a></code>( [ <var title="">text</var> [, <var title="">value</var> [, <var title="">defaultSelected</var> [, <var title="">selected</var> ] ] ] ] )</dt>
1.9 mike 817:
818: <dd>
819:
820: <p>Returns a new <code><a href="#the-option-element">option</a></code> element.</p>
821:
822: <p>The <var title="">text</var> argument sets the contents of the element.</p>
823: <p>The <var title="">value</var> argument sets the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute.</p>
824: <p>The <var title="">defaultSelected</var> argument sets the <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute.</p>
825: <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>
826:
827: </dd>
828:
1.48 mike 829: </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><dl class="element"><dt>Categories</dt>
1.9 mike 830: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
831: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
832: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
833: <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>
834: <dt>Contexts in which this element may be used:</dt>
835: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
836: <dt>Content model:</dt>
837: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
838: <dt>Content attributes:</dt>
839: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
840: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
841: <dd><code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code></dd>
842: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
843: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
844: <dd><code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength">maxlength</a></code></dd>
845: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
846: <dd><code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code></dd>
847: <dd><code title="attr-textarea-readonly"><a href="#attr-textarea-readonly">readonly</a></code></dd>
848: <dd><code title="attr-textarea-required"><a href="#attr-textarea-required">required</a></code></dd>
849: <dd><code title="attr-textarea-rows"><a href="#attr-textarea-rows">rows</a></code></dd>
850: <dd><code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code></dd>
851: <dt>DOM interface:</dt>
852: <dd>
853: <pre class="idl">interface <dfn id="htmltextareaelement">HTMLTextAreaElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 854: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
855: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-cols" title='Read about this "cols" reference in the full HTML5 spec.'>cols</a>;
856: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
857: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
858: attribute long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-maxlength" title='Read about this "maxLength" reference in the full HTML5 spec.'>maxLength</a>;
859: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
860: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-placeholder" title='Read about this "placeholder" reference in the full HTML5 spec.'>placeholder</a>;
861: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-readonly" title='Read about this "readOnly" reference in the full HTML5 spec.'>readOnly</a>;
862: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-required" title='Read about this "required" reference in the full HTML5 spec.'>required</a>;
863: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-rows" title='Read about this "rows" reference in the full HTML5 spec.'>rows</a>;
864: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-wrap" title='Read about this "wrap" reference in the full HTML5 spec.'>wrap</a>;
865:
866: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
867: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-defaultvalue" title='Read about this "defaultValue" reference in the full HTML5 spec.'>defaultValue</a>;
868: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
869: readonly attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-textlength" title='Read about this "textLength" reference in the full HTML5 spec.'>textLength</a>;
870:
871: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
872: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
873: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
874: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
875: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
876:
877: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
878:
879: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-select" title='Read about this "select" reference in the full HTML5 spec.'>select</a>();
880: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-selectionstart" title='Read about this "selectionStart" reference in the full HTML5 spec.'>selectionStart</a>;
881: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-selectionend" title='Read about this "selectionEnd" reference in the full HTML5 spec.'>selectionEnd</a>;
882: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-setselectionrange" title='Read about this "setSelectionRange" reference in the full HTML5 spec.'>setSelectionRange</a>(in unsigned long start, in unsigned long end);
1.9 mike 883: };</pre>
884: </dd>
1.48 mike 885: </dl><p>The <code><a href="#the-textarea-element">textarea</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a
1.9 mike 886: multiline plain text edit control. The contents of the control represent the
1.48 mike 887: control's default value.<p>The <dfn id="attr-textarea-readonly" title="attr-textarea-readonly"><code>readonly</code></dfn> attribute
1.9 mike 888: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a> used to control whether the text
1.48 mike 889: can be edited by the user or not.<p>The <dfn id="attr-textarea-cols" title="attr-textarea-cols"><code>cols</code></dfn>
1.9 mike 890: attribute specifies the expected maximum number of characters per
891: line. If the <code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code> attribute
892: is specified, its value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative
1.48 mike 893: integer</a> greater than zero. <p>The <dfn id="attr-textarea-rows" title="attr-textarea-rows"><code>rows</code></dfn>
1.9 mike 894: 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
895: value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a> greater than
1.48 mike 896: zero. <p>The <dfn id="attr-textarea-wrap" title="attr-textarea-wrap"><code>wrap</code></dfn>
1.9 mike 897: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a> with two keywords
898: and states: the <dfn id="attr-textarea-wrap-soft" title="attr-textarea-wrap-soft"><code>soft</code></dfn> keyword
899: which maps to the <dfn id="attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</dfn> state, and the
900: <dfn id="attr-textarea-wrap-hard" title="attr-textarea-wrap-hard"><code>hard</code></dfn> keyword
901: which maps to the <dfn id="attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</dfn> state. The
1.48 mike 902: <i>missing value default</i> is the <a href="#attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</a> state.<p>If the element's <code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code>
1.9 mike 903: 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
904: specified.</p><!-- attr-textarea-wrap-off (attr-textarea-wrap-off-state): not
905: conforming; turns off the rendering of wrapping but otherwise acts
906: like 'soft' --><p>The <dfn id="attr-textarea-maxlength" title="attr-textarea-maxlength"><code>maxlength</code></dfn>
907: 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
1.48 mike 908: <code><a href="#the-textarea-element">textarea</a></code> element's <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-textarea-dirty" title='Read about this "dirty value flag" reference in the full HTML5 spec.'>dirty value flag</a>.<p>If the <code><a href="#the-textarea-element">textarea</a></code> element has a <a href="association-of-controls-and-forms.html#maximum-allowed-value-length">maximum allowed
1.9 mike 909: value length</a>, then the element's children must be such that
1.48 mike 910: the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/common-microsyntaxes.html#code-point-length" title='Read about this "code-point length" reference in the full HTML5 spec.'>code-point length</a> of the value of the element's
911: <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> IDL attribute is equal to or less than the
912: element's <a href="association-of-controls-and-forms.html#maximum-allowed-value-length">maximum allowed value length</a>.<p>The <dfn id="attr-textarea-required" title="attr-textarea-required"><code>required</code></dfn> attribute
1.9 mike 913: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. When specified, the user will
914: 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>
915: attribute represents a hint (a word or short phrase) intended to aid
916: the user with data entry. A hint could be a sample value or a brief
917: description of the expected format. The attribute, if specified,
918: must have a value that contains no U+000A LINE FEED (LF) or U+000D
1.48 mike 919: CARRIAGE RETURN (CR) characters.<p class="note">For a longer hint or other advisory text, the <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute is more appropriate.<p>The <code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code>
1.9 mike 920: attribute should not be used as an alternative to a
1.48 mike 921: <code><a href="forms.html#the-label-element">label</a></code>.<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 922: explicitly associate the <code><a href="#the-textarea-element">textarea</a></code> element with its
923: <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>
924: 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
925: the control non-interactive and to prevent its value from being
926: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
1.48 mike 927: attribute controls focus.<dl class="domintro"><dt><var title="">textarea</var> . <code title="attr-textarea-type">type</code></dt>
1.9 mike 928:
929: <dd>
930:
931: <p>Returns the string "<code title="">textarea</code>".</p>
932:
933: </dd>
934:
935: <dt><var title="">textarea</var> . <code title="attr-textarea-value">value</code></dt>
936:
937: <dd>
938:
939: <p>Returns the current value of the element.</p>
940:
941: <p>Can be set, to change the value.</p>
942:
943: </dd>
944:
945: </dl><div class="example">
946:
947: <p>Here is an example of a <code><a href="#the-textarea-element">textarea</a></code> being used for
948: unrestricted free-form text input in a form:</p>
949:
950: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments></textarea></p></pre>
951:
1.48 mike 952: </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><dl class="element"><dt>Categories</dt>
1.9 mike 953: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
954: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
955: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
956: <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>
957: <dt>Contexts in which this element may be used:</dt>
958: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
959: <dt>Content model:</dt>
960: <dd>Empty.</dd>
961: <dt>Content attributes:</dt>
962: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
963: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
964: <dd><code title="attr-keygen-challenge"><a href="#attr-keygen-challenge">challenge</a></code></dd>
965: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
966: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
967: <dd><code title="attr-keygen-keytype"><a href="#attr-keygen-keytype">keytype</a></code></dd>
968: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
969: <dt>DOM interface:</dt>
970: <dd>
971: <pre class="idl">interface <dfn id="htmlkeygenelement">HTMLKeygenElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 972: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
973: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-keygen-challenge" title='Read about this "challenge" reference in the full HTML5 spec.'>challenge</a>;
974: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
975: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
976: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-keygen-keytype" title='Read about this "keytype" reference in the full HTML5 spec.'>keytype</a>;
977: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
978:
979: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-keygen-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
980:
981: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
982: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
983: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
984: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
985: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.9 mike 986:
1.48 mike 987: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 988: };</pre>
989: </dd>
1.48 mike 990: </dl><p>The <code><a href="#the-keygen-element">keygen</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a key
1.9 mike 991: pair generator control. When the control's form is submitted, the
992: private key is stored in the local keystore, and the public key is
1.48 mike 993: packaged and sent to the server.<p>The <dfn id="attr-keygen-challenge" title="attr-keygen-challenge"><code>challenge</code></dfn> attribute
1.9 mike 994: may be specified. Its value will be packaged with the submitted
1.48 mike 995: key.<p>The <dfn id="attr-keygen-keytype" title="attr-keygen-keytype"><code>keytype</code></dfn>
1.9 mike 996: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following
1.48 mike 997: table lists the keywords and states for the attribute — the
1.9 mike 998: keywords in the left column map to the states listed in the cell in
999: the second column on the same row as the keyword. User agents are
1.26 mike 1000: not required to support these values, and must only recognize values
1.48 mike 1001: whose corresponding algorithms they support.<table><thead><tr><th> Keyword <th> State
1002: <tbody><tr><td> <code title="">rsa</code>
1003: <td> <i title="">RSA</i>
1.9 mike 1004: <!-- v2 (see below)
1005: <tr>
1006: <td> <code title="">ec</code>
1007: <td> <i title="">EC</i>
1008: -->
1.48 mike 1009: </table><p>The <i>invalid value default</i> state is the <i title="">unknown</i> state. The <i>missing value default</i> state
1010: is the <i title="">RSA</i> state, if it is supported, or the <i title="">unknown</i> state otherwise.<p class="note">This specification does not specify what key types
1011: user agents are to support — it is possible for a user agent
1012: to not support any key types at all.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
1.9 mike 1013: explicitly associate the <code><a href="#the-keygen-element">keygen</a></code> element with its
1014: <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>
1015: 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
1016: the control non-interactive and to prevent its value from being
1017: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
1.48 mike 1018: attribute controls focus.<dl class="domintro"><dt><var title="">keygen</var> . <code title="attr-keygen-type">type</code></dt>
1.9 mike 1019:
1020: <dd>
1021:
1022: <p>Returns the string "<code title="">keygen</code>".</p>
1023:
1024: </dd>
1025:
1026: </dl><p class="note">This specification does not specify how the private
1027: key generated is to be used. It is expected that after receiving the
1.48 mike 1028: <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#signedpublickeyandchallenge" title='Read about this "SignedPublicKeyAndChallenge" reference in the full HTML5 spec.'>SignedPublicKeyAndChallenge</a></code> (SPKAC) structure, the
1.9 mike 1029: server will generate a client certificate and offer it back to the
1030: user for download; this certificate, once downloaded and stored in
1031: the key store along with the private key, can then be used to
1.88 mike 1032: authenticate to services that use TLS and certificate
1.9 mike 1033: authentication.</p><!-- how does the UA know which private key is associated with a
1034: certificate it gets back after the server has taken the public key
1035: created by <keygen> and turned it into a client cert? --><div class="example">
1036:
1037: <p>To generate a key pair, add the private key to the user's key
1038: store, and submit the public key to the server, markup such as the
1039: following can be used:</p>
1040:
1.22 mike 1041: <pre><form action="processkey.cgi" method="post" enctype="multipart/form-data">
1.9 mike 1042: <p><keygen name="key"></p>
1043: <p><input type=submit value="Submit key..."></p>
1044: </form></pre>
1045:
1046: <p>The server will then receive a form submission with a packaged
1047: RSA public key as the value of "<code title="">key</code>". This
1048: can then be used for various purposes, such as generating a client
1049: certificate, as mentioned above.</p>
1050:
1.48 mike 1051: </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><dl class="element"><dt>Categories</dt>
1.9 mike 1052: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1053: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1.11 mike 1054: <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 1055: <dt>Contexts in which this element may be used:</dt>
1056: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1057: <dt>Content model:</dt>
1058: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1059: <dt>Content attributes:</dt>
1060: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1061: <dd><code title="attr-output-for"><a href="#attr-output-for">for</a></code></dd>
1062: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1063: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
1064: <dt>DOM interface:</dt>
1065: <dd>
1066: <pre class="idl">interface <dfn id="htmloutputelement">HTMLOutputElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 1067: [PutForwards=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/common-dom-interfaces.html#dom-domsettabletokenlist-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>] readonly attribute <a href="urls.html#domsettabletokenlist">DOMSettableTokenList</a> <span title="dom-output-wrap">htmlFor</span>;
1068: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1069: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
1070:
1071: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
1072: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-defaultvalue" title='Read about this "defaultValue" reference in the full HTML5 spec.'>defaultValue</a>;
1073: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1074:
1075: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
1076: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
1077: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
1078: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
1079: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.11 mike 1080:
1.48 mike 1081: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 1082: };</pre>
1083: </dd>
1.48 mike 1084: </dl><p>The <code><a href="#the-output-element">output</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> the result of a
1085: calculation.<p>The <dfn id="attr-output-for" title="attr-output-for"><code>for</code></dfn> content
1.9 mike 1086: attribute allows an explicit relationship to be made between the
1087: result of a calculation and the elements that represent the values
1088: that went into the calculation or that otherwise influenced the
1089: calculation. The <code title="attr-output-for"><a href="#attr-output-for">for</a></code> attribute,
1090: if specified, must contain a string consisting of an <a href="common-microsyntaxes.html#unordered-set-of-unique-space-separated-tokens">unordered
1091: set of unique space-separated tokens</a>, each of which must have
1092: the value of an ID of an element in the same
1.48 mike 1093: <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#document" title='Read about this "Document" reference in the full HTML5 spec.'>Document</a></code>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
1.9 mike 1094: explicitly associate the <code><a href="#the-output-element">output</a></code> element with its
1095: <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>
1.48 mike 1096: attribute represents the element's name.<dl class="domintro"><dt><var title="">output</var> . <code title="dom-output-value"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 1097:
1098: <dd>
1099:
1100: <p>Returns the element's current value.</p>
1101:
1102: <p>Can be set, to change the value.</p>
1103:
1104: </dd>
1105:
1.48 mike 1106: <dt><var title="">output</var> . <code title="dom-output-defaultValue"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-defaultvalue" title='Read about this "defaultValue" reference in the full HTML5 spec.'>defaultValue</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 1107:
1108: <dd>
1109:
1110: <p>Returns the element's current default value.</p>
1111:
1112: <p>Can be set, to change the default value.</p>
1113:
1114: </dd>
1115:
1.48 mike 1116: <dt><var title="">output</var> . <code title="dom-output-type"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a></code></dt>
1.9 mike 1117:
1118: <dd>
1119:
1120: <p>Returns the string "<code title="">output</code>".</p>
1121:
1122: </dd>
1123:
1124: </dl><div class="example">
1125:
1126: <p>A simple calculator could use <code><a href="#the-output-element">output</a></code> for its
1127: display of calculated results:</p>
1128:
1129: <pre><form onsubmit="return false">
1130: <input name=a type=number step=any> +
1131: <input name=b type=number step=any> =
1.32 mike 1132: <output onforminput="value = a.valueAsNumber + b.valueAsNumber"></output>
1.9 mike 1133: </form></pre>
1134:
1.48 mike 1135: </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><dl class="element"><dt>Categories</dt>
1.11 mike 1136: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1137: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1138: <dd><a href="forms.html#category-label" title="category-label">Labelable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
1139: <dt>Contexts in which this element may be used:</dt>
1140: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1141: <dt>Content model:</dt>
1142: <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>
1143: <dt>Content attributes:</dt>
1144: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1145: <dd><code title="attr-progress-value"><a href="#attr-progress-value">value</a></code></dd>
1146: <dd><code title="attr-progress-max"><a href="#attr-progress-max">max</a></code></dd>
1147: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1148: <dt>DOM interface:</dt>
1149: <dd>
1150: <pre class="idl">interface <dfn id="htmlprogresselement">HTMLProgressElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 1151: attribute float <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1152: attribute float <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-max" title='Read about this "max" reference in the full HTML5 spec.'>max</a>;
1153: readonly attribute float <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-position" title='Read about this "position" reference in the full HTML5 spec.'>position</a>;
1154: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1155: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.11 mike 1156: };</pre>
1157: </dd>
1.48 mike 1158: </dl><p>The <code><a href="#the-progress-element">progress</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> the
1.11 mike 1159: completion progress of a task. The progress is either indeterminate,
1160: indicating that progress is being made but that it is not clear how
1161: much more work remains to be done before the task is complete
1162: (e.g. because the task is waiting for a remote host to respond), or
1163: the progress is a number in the range zero to a maximum, giving the
1.48 mike 1164: fraction of work that has so far been completed.<p>There are two attributes that determine the current task
1165: completion represented by the element.<p>The <dfn id="attr-progress-value" title="attr-progress-value"><code>value</code></dfn>
1.11 mike 1166: attribute specifies how much of the task has been completed, and the
1167: <dfn id="attr-progress-max" title="attr-progress-max"><code>max</code></dfn> attribute
1168: specifies how much work the task requires in total. The units are
1.48 mike 1169: arbitrary and not specified.<p>Authors are encouraged to also include the current value and the
1.11 mike 1170: maximum value inline as text inside the element, so that the
1.48 mike 1171: progress is made available to users of legacy user agents.<div class="example">
1.11 mike 1172: <p>Here is a snippet of a Web application that shows the progress
1173: of some automated task:</p>
1174: <pre><section>
1175: <h2>Task Progress</h2>
1176: <p>Progress: <progress id="p" max=100><span>0</span>%</progress></p>
1177: <script>
1178: var progressBar = document.getElementById('p');
1179: function updateProgress(newValue) {
1180: progressBar.value = newValue;
1181: progressBar.getElementsByTagName('span')[0].textContent = newValue;
1182: }
1183: </script>
1184: </section></pre>
1185: <p>(The <code>updateProgress()</code> method in this example would
1186: be called by some other code on the page to update the actual
1187: progress bar as the task progressed.)</p>
1188: </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
1189: have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" title="valid floating point number">valid
1190: floating point numbers</a>. The <code title="attr-progress-value"><a href="#attr-progress-value">value</a></code> attribute, if present, must
1191: have a value equal to or greater than zero, and less than or equal
1192: to the value of the <code title="attr-progress-max"><a href="#attr-progress-max">max</a></code>
1193: 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
1.48 mike 1194: have a value greater than zero.<p class="note">The <code><a href="#the-progress-element">progress</a></code> element is the wrong
1.11 mike 1195: element to use for something that is just a gauge, as opposed to
1196: task progress. For instance, indicating disk space usage using
1197: <code><a href="#the-progress-element">progress</a></code> would be inappropriate. Instead, the
1.48 mike 1198: <code><a href="#the-meter-element">meter</a></code> element is available for such use cases.<dl class="domintro"><dt><var title="">progress</var> . <code title="dom-progress-position"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-position" title='Read about this "position" reference in the full HTML5 spec.'>position</a></code></dt>
1.11 mike 1199:
1200: <dd>
1201:
1202: <p>For a determinate progress bar (one with known current and
1203: maximum values), returns the result of dividing the current value
1204: by the maximum value.</p>
1205:
1.48 mike 1206: <p>For an indeterminate progress bar, returns −1.</p>
1.11 mike 1207:
1.48 mike 1208: </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 1209: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1210: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1211: <dd><a href="forms.html#category-label" title="category-label">Labelable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
1212: <dt>Contexts in which this element may be used:</dt>
1213: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1214: <dt>Content model:</dt>
1215: <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>
1216: <dt>Content attributes:</dt>
1217: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1218: <dd><code title="attr-meter-value"><a href="#attr-meter-value">value</a></code></dd>
1219: <dd><code title="attr-meter-min"><a href="#attr-meter-min">min</a></code></dd>
1220: <dd><code title="attr-meter-max"><a href="#attr-meter-max">max</a></code></dd>
1221: <dd><code title="attr-meter-low"><a href="#attr-meter-low">low</a></code></dd>
1222: <dd><code title="attr-meter-high"><a href="#attr-meter-high">high</a></code></dd>
1223: <dd><code title="attr-meter-optimum"><a href="#attr-meter-optimum">optimum</a></code></dd>
1224: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1225: <dt>DOM interface:</dt>
1226: <dd>
1227: <pre class="idl">interface <dfn id="htmlmeterelement">HTMLMeterElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 1228: attribute float <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1229: attribute float <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-min" title='Read about this "min" reference in the full HTML5 spec.'>min</a>;
1230: attribute float <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-max" title='Read about this "max" reference in the full HTML5 spec.'>max</a>;
1231: attribute float <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-low" title='Read about this "low" reference in the full HTML5 spec.'>low</a>;
1232: attribute float <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-high" title='Read about this "high" reference in the full HTML5 spec.'>high</a>;
1233: attribute float <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-optimum" title='Read about this "optimum" reference in the full HTML5 spec.'>optimum</a>;
1234: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1235: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.11 mike 1236: };</pre>
1237: </dd>
1.48 mike 1238: </dl><p>The <code><a href="#the-meter-element">meter</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a scalar
1.11 mike 1239: measurement within a known range, or a fractional value; for example
1240: disk usage, the relevance of a query result, or the fraction of a
1.48 mike 1241: voting population to have selected a particular candidate.<p>This is also known as a gauge.<p class="note">The <code><a href="#the-meter-element">meter</a></code> element should not be used to
1.11 mike 1242: indicate progress (as in a progress bar). For that role, HTML
1.48 mike 1243: provides a separate <code><a href="#the-progress-element">progress</a></code> element.<p class="note">The <code><a href="#the-meter-element">meter</a></code> element also does not
1244: represent a scalar value of arbitrary range — for example, it
1.11 mike 1245: would be wrong to use this to report a weight, or height, unless
1.48 mike 1246: there is a known maximum value.<p>There are six attributes that determine the semantics of the
1247: gauge represented by the element.<p>The <dfn id="attr-meter-min" title="attr-meter-min"><code>min</code></dfn> attribute
1.11 mike 1248: specifies the lower bound of the range, and the <dfn id="attr-meter-max" title="attr-meter-max"><code>max</code></dfn> attribute specifies
1249: the upper bound. The <dfn id="attr-meter-value" title="attr-meter-value"><code>value</code></dfn> attribute
1250: specifies the value to have the gauge indicate as the "measured"
1.48 mike 1251: value.<p>The other three attributes can be used to segment the gauge's
1.11 mike 1252: range into "low", "medium", and "high" parts, and to indicate which
1253: part of the gauge is the "optimum" part. The <dfn id="attr-meter-low" title="attr-meter-low"><code>low</code></dfn> attribute specifies
1254: 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
1255: 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
1256: gives the position that is "optimum"; if that is higher than the
1257: "high" value then this indicates that the higher the value, the
1258: better; if it's lower than the "low" mark then it indicates that
1259: lower values are better, and naturally if it is in between then it
1.48 mike 1260: indicates that neither high nor low values are good.<p> The <code title="attr-meter-value"><a href="#attr-meter-value">value</a></code> attribute must be
1.11 mike 1261: 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,
1262: must have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" title="valid floating point
1.48 mike 1263: number">valid floating point numbers</a>.<p>In addition, the attributes' values are further constrained:<p>Let <var title="">value</var> be the <code title="attr-meter-value"><a href="#attr-meter-value">value</a></code> attribute's number.<p>If the <code title="attr-meter-min"><a href="#attr-meter-min">min</a></code> attribute
1.11 mike 1264: attribute is specified, then let <var title="">minimum</var> be that
1.48 mike 1265: attribute's value; otherwise, let it be zero.<p>If the <code title="attr-meter-max"><a href="#attr-meter-max">max</a></code> attribute
1.11 mike 1266: attribute is specified, then let <var title="">maximum</var> be that
1.48 mike 1267: attribute's value; otherwise, let it be 1.0.<p>The following inequalities must hold, as applicable:<ul class="brief"><li><var title="">minimum</var> ≤ <var title="">value</var> ≤ <var title="">maximum</var></li>
1268: <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>
1269: <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>
1270: <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>
1271: <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>
1.21 mike 1272: </ul><p class="note">If no minimum or maximum is specified, then the
1.11 mike 1273: range is assumed to be 0..1, and the value thus has to be within
1.48 mike 1274: that range.<p>Authors are encouraged to include a textual representation of the
1.11 mike 1275: gauge's state in the element's contents, for users of user agents
1.48 mike 1276: that do not support the <code><a href="#the-meter-element">meter</a></code> element.<div class="example">
1.11 mike 1277:
1278: <p>The following examples show three gauges that would all be
1279: three-quarters full:</p>
1280:
1281: <pre>Storage space usage: <meter value=6 max=8>6 blocks used (out of 8 total)</meter>
1282: Voter turnout: <meter value=0.75><img alt="75%" src="graph75.png"></meter>
1283: Tickets sold: <meter min="0" max="100" value="75"></meter></pre>
1284:
1285: <p>The following example is incorrect use of the element, because
1286: it doesn't give a range (and since the default maximum is 1, both
1287: of the gauges would end up looking maxed out):</p>
1288:
1289: <pre class="bad"><p>The grapefruit pie had a radius of <meter value=12>12cm</meter>
1290: and a height of <meter value=2>2cm</meter>.</p> <!-- <strong>BAD!</strong> --></pre>
1291:
1292: <p>Instead, one would either not include the meter element, or use
1293: the meter element with a defined range to give the dimensions in
1294: context compared to other pies:</p>
1295:
1296: <pre><p>The grapefruit pie had a radius of 12cm and a height of
1297: 2cm.</p>
1298: <dl>
1299: <dt>Radius: <dd> <meter min=0 max=20 value=12>12cm</meter>
1300: <dt>Height: <dd> <meter min=0 max=10 value=2>2cm</meter>
1301: </dl></pre>
1302:
1303: </div><p>There is no explicit way to specify units in the
1304: <code><a href="#the-meter-element">meter</a></code> element, but the units may be specified in the
1.48 mike 1305: <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute in free-form text.<div class="example">
1.11 mike 1306:
1307: <p>The example above could be extended to mention the units:</p>
1308:
1309: <pre><dl>
1310: <dt>Radius: <dd> <meter min=0 max=20 value=12 title="centimeters">12cm</meter>
1311: <dt>Height: <dd> <meter min=0 max=10 value=2 title="centimeters">2cm</meter>
1312: </dl></pre>
1313:
1314: </div><div class="example">
1315: <p>The following markup:</p>
1316: <pre><h3>Suggested groups</h3>
1317: <menu type="toolbar">
1318: <a href="?cmd=hsg" onclick="hideSuggestedGroups()">Hide suggested groups</a>
1319: </menu>
1320: <ul>
1321: <li>
1322: <p><a href="/group/comp.infosystems.www.authoring.stylesheets/view">comp.infosystems.www.authoring.stylesheets</a> -
1323: <a href="/group/comp.infosystems.www.authoring.stylesheets/subscribe">join</a></p>
1324: <p>Group description: <strong>Layout/presentation on the WWW.</strong></p>
1325: <p><strong><meter value="0.5">Moderate activity,</meter></strong> Usenet, 618 subscribers</p>
1326: </li>
1327: <li>
1328: <p><a href="/group/netscape.public.mozilla.xpinstall/view">netscape.public.mozilla.xpinstall</a> -
1329: <a href="/group/netscape.public.mozilla.xpinstall/subscribe">join</a></p>
1330: <p>Group description: <strong>Mozilla XPInstall discussion.</strong></p>
1331: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 22 subscribers</p>
1332: </li>
1333: <li>
1334: <p><a href="/group/mozilla.dev.general/view">mozilla.dev.general</a> -
1335: <a href="/group/mozilla.dev.general/subscribe">join</a></p>
1336: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 66 subscribers</p>
1337: </li>
1338: </ul></pre>
1339: <p>Might be rendered as follows:</p>
1.48 mike 1340: <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 1341: </div><p>User agents combine the value of
1342: the <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute and the other
1.11 mike 1343: attributes to provide context-sensitive help or inline text
1.48 mike 1344: detailing the actual values.<div class="example">
1.11 mike 1345: <p>For example, the following snippet:</p>
1346: <pre><meter min=0 max=60 value=23.2 title=seconds></meter></pre>
1347: <p>...might cause the user agent to display a gauge with a tooltip
1348: saying "Value: 23.2 out of 60." on one line and "seconds" on a
1349: second line.</p>
1350: </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
1351: explicitly associate the <code><a href="#the-meter-element">meter</a></code> element with its
1.48 mike 1352: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>.<div class="example">
1.11 mike 1353:
1354: <p>The following example shows how a gauge could fall back to
1355: localized or pretty-printed text.</p>
1356:
1.48 mike 1357: <pre><p>Disk usage: <meter min=0 value=170261928 max=233257824>170 261 928 bytes used
1358: out of 233 257 824 bytes available</meter></p></pre>
1.11 mike 1359:
1.48 mike 1360: </div>
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