Annotation of html5/spec-author-view/the-button-element.html, revision 1.130
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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1.34 mike 27: table thead, table tbody { border-bottom: solid; }
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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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157:
1.14 mike 158: body.dfnEnabled dfn { cursor: pointer; }
159: .dfnPanel {
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176:
1.1 mike 177: #configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
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181: #configUI input[type=button] { display: block; margin: auto; }
1.121 mike 182:
1.1 mike 183: </style><style type="text/css">
184:
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1.9 mike 224: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
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227:
1.11 mike 228: .details-example img { vertical-align: top; }
229:
1.26 mike 230: #named-character-references-table {
231: font-size: 0.6em;
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241:
1.35 mike 242: .glyph.control { color: red; }
243:
1.38 mike 244: @font-face {
245: font-family: 'Essays1743';
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248: @font-face {
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263: }
264:
1.25 mike 265: </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 266: function getCookie(name) {
267: var params = location.search.substr(1).split("&");
268: for (var index = 0; index < params.length; index++) {
269: if (params[index] == name)
270: return "1";
271: var data = params[index].split("=");
272: if (data[0] == name)
273: return unescape(data[1]);
274: }
275: var cookies = document.cookie.split("; ");
276: for (var index = 0; index < cookies.length; index++) {
277: var data = cookies[index].split("=");
278: if (data[0] == name)
279: return unescape(data[1]);
280: }
281: return null;
282: }
283: function load(script) {
284: var e = document.createElement('script');
285: e.setAttribute('src', 'http://www.whatwg.org/specs/web-apps/current-work/' + script + '?' + encodeURIComponent(location) + '&' + encodeURIComponent(document.referrer));
286: document.body.appendChild(e);
287: }
288: function init() {
289: if (location.search == '?slow-browser')
290: return;
291: var configUI = document.createElement('div');
292: configUI.id = 'configUI';
293: document.body.appendChild(configUI);
294: // load('reviewer.js'); // would need cross-site XHR
295: if (document.getElementById('head'))
296: load('toc.js');
297:
298: // load('updater.js'); // would need cross-site XHR
1.11 mike 299: load('dfn.js'); // doesn't support split-out specs, but, oh well.
1.9 mike 300: // load('status.js'); // would need cross-site XHR
301: if (getCookie('profile') == '1')
302: document.getElementsByTagName('h2')[0].textContent += '; load: ' + (new Date() - loadTimer) + 'ms';
303: fixBrokenLink();
304: }
1.54 mike 305: </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 306: <link href="Overview.html#contents" rel="index" title="Table of contents">
307: <link href="association-of-controls-and-forms.html" rel="next" title="4.10.18 Association of controls and forms">
308: <body onload="fixBrokenLink(); init()"><div class="head" id="head">
1.9 mike 309: <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 310:
1.130 ! mike 311: <h1>HTML5 (Edition for Web Authors)<span class="rcsrevision"> revision 1.4199</span></h1>
1.9 mike 312: </div><div>
1.48 mike 313: <a href="common-input-element-attributes.html">← 4.10.7.2 Common input element attributes</a> –
314: <a href="Overview.html#contents">Table of contents</a> –
315: <a href="association-of-controls-and-forms.html">4.10.18 Association of controls and forms →</a>
316: <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 317:
1.48 mike 318: <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 319: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
320: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
321: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
322: <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>
323: <dt>Contexts in which this element may be used:</dt>
324: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
325: <dt>Content model:</dt>
326: <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>
327: <dt>Content attributes:</dt>
328: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
329: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
330: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
331: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
332: <dd><code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code></dd>
333: <dd><code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code></dd>
334: <dd><code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code></dd>
335: <dd><code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code></dd>
336: <dd><code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code></dd>
337: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
338: <dd><code title="attr-button-type"><a href="#attr-button-type">type</a></code></dd>
339: <dd><code title="attr-button-value"><a href="#attr-button-value">value</a></code></dd>
340: <dt>DOM interface:</dt>
341: <dd>
342: <pre class="idl">interface <dfn id="htmlbuttonelement">HTMLButtonElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 343: 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>;
344: 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>;
345: 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>;
346: 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>;
347: 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>;
348: 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>;
349: 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>;
350: 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>;
351: 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>;
352: 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>;
353: 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>;
354:
355: 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>;
356: 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>;
357: 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>;
358: 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>();
359: 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 360:
1.48 mike 361: 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 362: };</pre>
363: </dd>
1.48 mike 364: </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
365: 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 366: attribute controls the behavior of the button when it is activated.
367: It is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following table
1.48 mike 368: lists the keywords and states for the attribute — the keywords
1.9 mike 369: in the left column map to the states in the cell in the second
1.48 mike 370: column on the same row as the keyword.<table><thead><tr><th> Keyword
371: <th> State
372: <th> Brief description
373: <tbody><tr><td><dfn id="attr-button-type-submit" title="attr-button-type-submit"><code>submit</code></dfn>
374: <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>
375: <td>Submits the form.
376: <tr><td><dfn id="attr-button-type-reset" title="attr-button-type-reset"><code>reset</code></dfn>
377: <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>
378: <td>Resets the form.
379: <tr><td><dfn id="attr-button-type-button" title="attr-button-type-button"><code>button</code></dfn>
380: <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>
381: <td>Does nothing.
382: </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>
383: state.<p>If the <code title="attr-button-type"><a href="#attr-button-type">type</a></code> attribute is in
384: 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, 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 386: explicitly associate the <code><a href="#the-button-element">button</a></code> element with its
387: <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>
388: 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
389: the control non-interactive and to prevent its value from being
390: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
391: 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 392: <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 393: be used to make submit buttons that do not trigger the constraint
1.48 mike 394: 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 395: if the element's <code title="attr-button-type"><a href="#attr-button-type">type</a></code>
1.48 mike 396: 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>
397: state.<p>The <dfn id="attr-button-value" title="attr-button-value"><code>value</code></dfn>
1.9 mike 398: attribute gives the element's value for the purposes of form
1.48 mike 399: 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 400: <code title="attr-button-value"><a href="#attr-button-value">value</a></code> attribute, if there is
1.48 mike 401: one, or the empty string otherwise.<p class="note">A button (and its value) is only included in the
1.9 mike 402: form submission if the button itself was used to initiate the form
1.48 mike 403: submission.<div class="example">
1.9 mike 404:
405: <p>The following button is labeled "Show hint" and pops up a dialog
406: box when activated:</p>
407:
408: <pre><button type=button
409: onclick="alert('This 15-20 minute piece was composed by George Gershwin.')">
410: Show hint
411: </button></pre>
412:
1.48 mike 413: </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 414: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
415: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
416: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
417: <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>
418: <dt>Contexts in which this element may be used:</dt>
419: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
420: <dt>Content model:</dt>
421: <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>
422: <dt>Content attributes:</dt>
423: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
424: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
425: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
426: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
427: <dd><code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code></dd>
428: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
429: <dd><code title="attr-select-size"><a href="#attr-select-size">size</a></code></dd>
430: <dt>DOM interface:</dt>
431: <dd>
432: <pre class="idl">interface <dfn id="htmlselectelement">HTMLSelectElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 433: 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>;
434: 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>;
435: 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>;
436: 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>;
437: 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>;
438: 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>;
439:
440: 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>;
441:
442: 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>;
443: 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>;
444: 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);
445: 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);
446: 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);
447: 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);
448: 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);
449:
450: 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>;
451: 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>;
452: 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>;
453:
454: 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>;
455: 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>;
456: 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>;
457: 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>();
458: 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 459:
1.48 mike 460: 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 461: };</pre>
462: </dd>
463: </dl><!-- Proposals for v2:
464: * <select value=""> as an alternative to <option selected>
465: http://developers.slashdot.org/comments.pl?sid=426306&cid=22142072
1.11 mike 466: <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 467: src="/js/flightcity.js"></SCRIPT></select> which is the kind of thing that could be much simpler with <select value="PEK">
468: * a way to make the <select> not have a default value at all (ack
469: or to have a "placeholer" like value that doesn't count as a value being selected but shows a prompt until a value is selected
470: * once we can have no default, a way to require="" a value.
471: ack Weston Ruter: http://weston.ruter.net/projects/test-cases/html-select-element/
472: q.v. http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2008-November/017583.html
473: --><p>The <code><a href="#the-select-element">select</a></code> element represents a control for
1.48 mike 474: selecting amongst a set of options.<p>The <dfn id="attr-select-multiple" title="attr-select-multiple"><code>multiple</code></dfn>
1.9 mike 475: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. If the attribute is
476: present, then the <code><a href="#the-select-element">select</a></code> element
1.48 mike 477: <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 478: from the <a href="#concept-select-option-list" title="concept-select-option-list">list of
479: options</a>. If the attribute is absent, then the
1.48 mike 480: <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
481: 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="concept-select-option-list" title="concept-select-option-list">list of options</dfn>
1.9 mike 482: for a <code><a href="#the-select-element">select</a></code> element consists of all the
483: <code><a href="#the-option-element">option</a></code> element children of the <code><a href="#the-select-element">select</a></code>
484: element, and all the <code><a href="#the-option-element">option</a></code> element children of all the
485: <code><a href="#the-optgroup-element">optgroup</a></code> element children of the <code><a href="#the-select-element">select</a></code>
1.48 mike 486: element, in <a href="infrastructure.html#tree-order">tree order</a>.<p>The <dfn id="attr-select-size" title="attr-select-size"><code>size</code></dfn>
1.9 mike 487: 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
488: have a value that is a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a>
489: greater than zero. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is present,
490: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
491: default value is 4. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is absent,
492: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
1.48 mike 493: default value is 1.<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 494: explicitly associate the <code><a href="#the-select-element">select</a></code> element with its
495: <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>
496: 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
497: the control non-interactive and to prevent its value from being
498: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
1.48 mike 499: 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 500:
501: <dd>
502:
503: <p>Returns "<code title="">select-multiple</code>" if the element
504: has a <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
505: attribute, and "<code title="">select-one</code>"
506: otherwise.</p>
507:
508: </dd>
509:
1.48 mike 510: <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 511:
512: <dd>
513:
514: <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>
515:
516: </dd>
517:
1.48 mike 518: <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 519: <dd>
520: <p>Returns the number of elements in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
521: <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>
522: <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>
523: </dd>
524:
1.48 mike 525: <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 526: <dt><var title="">select</var>[<var title="">index</var>]</dt>
527: <dt><var title="">select</var>(<var title="">index</var>)</dt>
528: <dd>
529: <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>
530: <p>Returns null if <var title="">index</var> is out of range.</p>
531: </dd>
532:
1.48 mike 533: <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 534: <dt><var title="">select</var>[<var title="">name</var>]</dt>
535: <dt><var title="">select</var>(<var title="">name</var>)</dt>
536: <dd>
1.28 mike 537: <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 538: <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 539: <p>Returns null if no element with that ID could be found.</p>
540: </dd>
541:
1.48 mike 542: <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 543: <dd>
544: <p>Inserts <var title="">element</var> before the node given by <var title="">before</var>.</p>
545: <p>The <var title="">before</var> argument can be a number, in
546: which case <var title="">element</var> is inserted before the item
547: with that number, or an element from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>, in
548: which case <var title="">element</var> is inserted before that
549: element.</p>
550: <p>If <var title="">before</var> is omitted, null, or a number out
551: of range, then <var title="">element</var> will be added at the
552: end of the list.</p>
553: <p>This method will throw a <code><a href="urls.html#hierarchy_request_err">HIERARCHY_REQUEST_ERR</a></code>
554: exception if <var title="">element</var> is an ancestor of the
555: 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
556: <code><a href="#the-optgroup-element">optgroup</a></code> element, then the method does nothing.</p>
557: </dd>
558:
1.48 mike 559: <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 560:
561: <dd>
562:
563: <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
564: selected.</p>
565:
566: </dd>
567:
1.48 mike 568: <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 569:
570: <dd>
571:
572: <p>Returns the index of the first selected item, if any, or
1.48 mike 573: −1 if there is no selected item.</p>
1.9 mike 574:
575: <p>Can be set, to change the selection.</p>
576:
577: </dd>
578:
1.48 mike 579: <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 580:
581: <dd>
582:
1.48 mike 583: <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 584: first selected item, if any, or the empty string if there is no
585: selected item.</p>
586:
587: <p>Can be set, to change the selection.</p>
588:
589: </dd>
590:
591: </dl><div class="example">
592:
593: <p>The following example shows how a <code><a href="#the-select-element">select</a></code> element
594: can be used to offer the user with a set of options from which the
595: user can select a single option. The default option is
596: preselected.</p>
597:
598: <pre><p>
599: <label for="unittype">Select unit type:</label>
600: <select id="unittype" name="unittype">
601: <option value="1"> Miner </option>
602: <option value="2"> Puffer </option>
603: <option value="3" selected> Snipey </option>
604: <option value="4"> Max </option>
605: <option value="5"> Firebot </option>
606: </select>
607: </p></pre>
608:
609: </div><div class="example">
610:
611: <p>Here, the user is offered a set of options from which he can
612: select any number. By default, all five options are selected.</p>
613:
614: <pre><p>
615: <label for="allowedunits">Select unit types to enable on this map:</label>
616: <select id="allowedunits" name="allowedunits" multiple>
617: <option value="1" selected> Miner </option>
618: <option value="2" selected> Puffer </option>
619: <option value="3" selected> Snipey </option>
620: <option value="4" selected> Max </option>
621: <option value="5" selected> Firebot </option>
622: </select>
623: </p></pre>
624:
1.48 mike 625: </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 626: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
627: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
628: <dt>Contexts in which this element may be used:</dt>
629: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
630: <dt>Content model:</dt>
631: <dd>Either: <a href="content-models.html#phrasing-content">phrasing content</a>.</dd>
632: <dd>Or: Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
633: <dt>Content attributes:</dt>
634: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
635: <dt>DOM interface:</dt>
636: <dd>
637: <pre class="idl">interface <dfn id="htmldatalistelement">HTMLDataListElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 638: 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 639: };</pre>
640: </dd>
641: </dl><p>The <code><a href="#the-datalist-element">datalist</a></code> element represents a set of
642: <code><a href="#the-option-element">option</a></code> elements that represent predefined options for
643: other controls. The contents of the element represents fallback
644: content for legacy user agents, intermixed with <code><a href="#the-option-element">option</a></code>
645: elements that represent the predefined options. In the rendering,
1.48 mike 646: 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>
647: nothing.<p>The <code><a href="#the-datalist-element">datalist</a></code> element is hooked up to an
1.9 mike 648: <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
649: <code><a href="the-input-element.html#the-input-element">input</a></code> element. <!-- v2DATAGRID The
650: <code>datalist</code> element can also be used with a
651: <code>datagrid</code> element, as the source of autocompletion hints
652: for <code title="datagrid-type-editable">editable</code>
1.48 mike 653: cells. --><p>Each <code><a href="#the-option-element">option</a></code> element that is a descendant of the
1.9 mike 654: <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
655: 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>.
656:
1.48 mike 657: <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 658:
659: <dd>
660: <p>Returns an <code><a href="urls.html#htmlcollection">HTMLCollection</a></code> of the <code>options</code> elements of the table.</p>
661: </dd>
662:
1.48 mike 663: </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 664: <dd>None.</dd>
665: <dt>Contexts in which this element may be used:</dt>
666: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
667: <dt>Content model:</dt>
668: <dd>Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
669: <dt>Content attributes:</dt>
670: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
671: <dd><code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled">disabled</a></code></dd>
672: <dd><code title="attr-optgroup-label"><a href="#attr-optgroup-label">label</a></code></dd>
673: <dt>DOM interface:</dt>
674: <dd>
675: <pre class="idl">interface <dfn id="htmloptgroupelement">HTMLOptGroupElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 676: 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>;
677: 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 678: };</pre>
679: </dd>
1.48 mike 680: </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
681: <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 682: the <code><a href="#the-option-element">option</a></code> elements that are children of the
1.48 mike 683: <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 684: 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 685: <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 686: attribute must be specified. Its value gives the name of the group,
1.48 mike 687: for the purposes of the user interface. <div class="example">
1.9 mike 688:
689: <p>The following snippet shows how a set of lessons from three
690: courses could be offered in a <code><a href="#the-select-element">select</a></code> drop-down
691: widget:</p>
692:
693: <pre><form action="courseselector.dll" method="get">
694: <p>Which course would you like to watch today?
695: <p><label>Course:
696: <select name="c">
697: <optgroup label="8.01 Physics I: Classical Mechanics">
698: <option value="8.01.1">Lecture 01: Powers of Ten
699: <option value="8.01.2">Lecture 02: 1D Kinematics
700: <option value="8.01.3">Lecture 03: Vectors
701: <optgroup label="8.02 Electricity and Magnestism">
702: <option value="8.02.1">Lecture 01: What holds our world together?
703: <option value="8.02.2">Lecture 02: Electric Field
704: <option value="8.02.3">Lecture 03: Electric Flux
705: <optgroup label="8.03 Physics III: Vibrations and Waves">
706: <option value="8.03.1">Lecture 01: Periodic Phenomenon
707: <option value="8.03.2">Lecture 02: Beats
708: <option value="8.03.3">Lecture 03: Forced Oscillations with Damping
709: </select>
710: </label>
1.55 mike 711: <p><input type=submit value="▶ Play">
1.9 mike 712: </form></pre>
713:
1.48 mike 714: </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 715: <dd>None.</dd>
716: <dt>Contexts in which this element may be used:</dt>
717: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
718: <dd>As a child of a <code><a href="#the-datalist-element">datalist</a></code> element.</dd>
719: <dd>As a child of an <code><a href="#the-optgroup-element">optgroup</a></code> element.</dd>
720: <dt>Content model:</dt>
721: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
722: <dt>Content attributes:</dt>
723: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
724: <dd><code title="attr-option-disabled"><a href="#attr-option-disabled">disabled</a></code></dd>
725: <dd><code title="attr-option-label"><a href="#attr-option-label">label</a></code></dd>
726: <dd><code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code></dd>
727: <dd><code title="attr-option-value"><a href="#attr-option-value">value</a></code></dd>
728: <dt>DOM interface:</dt>
729: <dd>
1.48 mike 730: <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>(),
731: 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),
732: 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),
733: 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),
734: 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 735: interface <dfn id="htmloptionelement">HTMLOptionElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 736: 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>;
737: 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>;
738: 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>;
739: 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>;
740: 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>;
741: 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 742:
1.48 mike 743: 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>;
744: 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 745: };</pre>
746: </dd>
1.48 mike 747: </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 748: in a <code><a href="#the-select-element">select</a></code> element or as part of a list of suggestions
1.48 mike 749: in a <code><a href="#the-datalist-element">datalist</a></code> element.<p>The <dfn id="attr-option-disabled" title="attr-option-disabled"><code>disabled</code></dfn>
1.9 mike 750: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. An
751: <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
752: 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 753: present.<p>The <dfn id="attr-option-label" title="attr-option-label"><code>label</code></dfn>
1.9 mike 754: 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>
755: 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 756: 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 757: 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>
758: 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 759: 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>
760: 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
761: 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 762: specified must not have more than one descendant <code><a href="#the-option-element">option</a></code>
763: element with its <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code>
1.48 mike 764: 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 765:
766: <dd>
767:
768: <p>Returns true if the element is selected, and false otherwise.</p>
769:
770: </dd>
771:
1.48 mike 772: <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 773:
774: <dd>
775:
776: <p>Returns the index of the element in its <code><a href="#the-select-element">select</a></code>
1.48 mike 777: 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 778: list.</p>
779:
780: </dd>
781:
1.48 mike 782: <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 783:
784: <dd>
785:
786: <p>Returns the element's <code><a href="forms.html#the-form-element">form</a></code> element, if any, or
787: null otherwise.</p>
788:
789: </dd>
790:
1.48 mike 791: <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 792:
793: <dd>
794:
1.48 mike 795: <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 796:
797: </dd>
798:
1.48 mike 799: <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 800:
801: <dd>
802:
803: <p>Returns a new <code><a href="#the-option-element">option</a></code> element.</p>
804:
805: <p>The <var title="">text</var> argument sets the contents of the element.</p>
806: <p>The <var title="">value</var> argument sets the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute.</p>
807: <p>The <var title="">defaultSelected</var> argument sets the <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute.</p>
808: <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>
809:
810: </dd>
811:
1.48 mike 812: </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 813: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
814: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
815: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
816: <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>
817: <dt>Contexts in which this element may be used:</dt>
818: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
819: <dt>Content model:</dt>
820: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
821: <dt>Content attributes:</dt>
822: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
823: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
824: <dd><code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code></dd>
825: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
826: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
827: <dd><code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength">maxlength</a></code></dd>
828: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
829: <dd><code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code></dd>
830: <dd><code title="attr-textarea-readonly"><a href="#attr-textarea-readonly">readonly</a></code></dd>
831: <dd><code title="attr-textarea-required"><a href="#attr-textarea-required">required</a></code></dd>
832: <dd><code title="attr-textarea-rows"><a href="#attr-textarea-rows">rows</a></code></dd>
833: <dd><code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code></dd>
834: <dt>DOM interface:</dt>
835: <dd>
836: <pre class="idl">interface <dfn id="htmltextareaelement">HTMLTextAreaElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 837: 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>;
838: 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>;
839: 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>;
840: 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>;
841: 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>;
842: 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>;
843: 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>;
844: 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>;
845: 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>;
846: 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>;
847: 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>;
848:
849: 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>;
850: 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>;
851: 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>;
852: 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>;
853:
854: 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>;
855: 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>;
856: 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>;
857: 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>();
858: 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);
859:
860: 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>;
861:
862: 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>();
863: 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>;
864: 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>;
865: 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 866: };</pre>
867: </dd>
1.48 mike 868: </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 869: multiline plain text edit control. The contents of the control represent the
1.48 mike 870: control's default value.<p>The <dfn id="attr-textarea-readonly" title="attr-textarea-readonly"><code>readonly</code></dfn> attribute
1.9 mike 871: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a> used to control whether the text
1.48 mike 872: 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 873: attribute specifies the expected maximum number of characters per
874: line. If the <code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code> attribute
875: is specified, its value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative
1.48 mike 876: integer</a> greater than zero. <p>The <dfn id="attr-textarea-rows" title="attr-textarea-rows"><code>rows</code></dfn>
1.9 mike 877: 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
878: value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a> greater than
1.48 mike 879: zero. <p>The <dfn id="attr-textarea-wrap" title="attr-textarea-wrap"><code>wrap</code></dfn>
1.9 mike 880: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a> with two keywords
881: and states: the <dfn id="attr-textarea-wrap-soft" title="attr-textarea-wrap-soft"><code>soft</code></dfn> keyword
882: which maps to the <dfn id="attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</dfn> state, and the
883: <dfn id="attr-textarea-wrap-hard" title="attr-textarea-wrap-hard"><code>hard</code></dfn> keyword
884: which maps to the <dfn id="attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</dfn> state. The
1.48 mike 885: <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 886: 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
887: specified.</p><!-- attr-textarea-wrap-off (attr-textarea-wrap-off-state): not
888: conforming; turns off the rendering of wrapping but otherwise acts
889: like 'soft' --><p>The <dfn id="attr-textarea-maxlength" title="attr-textarea-maxlength"><code>maxlength</code></dfn>
890: 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 891: <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 892: value length</a>, then the element's children must be such that
1.48 mike 893: 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
894: <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
895: 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 896: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. When specified, the user will
897: 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>
898: attribute represents a hint (a word or short phrase) intended to aid
899: the user with data entry. A hint could be a sample value or a brief
900: description of the expected format. The attribute, if specified,
901: must have a value that contains no U+000A LINE FEED (LF) or U+000D
1.48 mike 902: 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 903: attribute should not be used as an alternative to a
1.48 mike 904: <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 905: explicitly associate the <code><a href="#the-textarea-element">textarea</a></code> element with its
906: <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>
907: 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
908: the control non-interactive and to prevent its value from being
909: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
1.48 mike 910: attribute controls focus.<dl class="domintro"><dt><var title="">textarea</var> . <code title="attr-textarea-type">type</code></dt>
1.9 mike 911:
912: <dd>
913:
914: <p>Returns the string "<code title="">textarea</code>".</p>
915:
916: </dd>
917:
918: <dt><var title="">textarea</var> . <code title="attr-textarea-value">value</code></dt>
919:
920: <dd>
921:
922: <p>Returns the current value of the element.</p>
923:
924: <p>Can be set, to change the value.</p>
925:
926: </dd>
927:
928: </dl><div class="example">
929:
930: <p>Here is an example of a <code><a href="#the-textarea-element">textarea</a></code> being used for
931: unrestricted free-form text input in a form:</p>
932:
933: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments></textarea></p></pre>
934:
1.48 mike 935: </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 936: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
937: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
938: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
939: <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>
940: <dt>Contexts in which this element may be used:</dt>
941: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
942: <dt>Content model:</dt>
943: <dd>Empty.</dd>
944: <dt>Content attributes:</dt>
945: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
946: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
947: <dd><code title="attr-keygen-challenge"><a href="#attr-keygen-challenge">challenge</a></code></dd>
948: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
949: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
950: <dd><code title="attr-keygen-keytype"><a href="#attr-keygen-keytype">keytype</a></code></dd>
951: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
952: <dt>DOM interface:</dt>
953: <dd>
954: <pre class="idl">interface <dfn id="htmlkeygenelement">HTMLKeygenElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 955: 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>;
956: 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>;
957: 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>;
958: 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>;
959: 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>;
960: 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>;
961:
962: 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>;
963:
964: 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>;
965: 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>;
966: 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>;
967: 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>();
968: 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 969:
1.48 mike 970: 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 971: };</pre>
972: </dd>
1.48 mike 973: </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 974: pair generator control. When the control's form is submitted, the
975: private key is stored in the local keystore, and the public key is
1.48 mike 976: 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 977: may be specified. Its value will be packaged with the submitted
1.48 mike 978: key.<p>The <dfn id="attr-keygen-keytype" title="attr-keygen-keytype"><code>keytype</code></dfn>
1.9 mike 979: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following
1.48 mike 980: table lists the keywords and states for the attribute — the
1.9 mike 981: keywords in the left column map to the states listed in the cell in
982: the second column on the same row as the keyword. User agents are
1.26 mike 983: not required to support these values, and must only recognize values
1.48 mike 984: whose corresponding algorithms they support.<table><thead><tr><th> Keyword <th> State
985: <tbody><tr><td> <code title="">rsa</code>
986: <td> <i title="">RSA</i>
1.9 mike 987: <!-- v2 (see below)
988: <tr>
989: <td> <code title="">ec</code>
990: <td> <i title="">EC</i>
991: -->
1.48 mike 992: </table><p>The <i>invalid value default</i> state is the <i title="">unknown</i> state. The <i>missing value default</i> state
993: 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
994: user agents are to support — it is possible for a user agent
995: 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 996: explicitly associate the <code><a href="#the-keygen-element">keygen</a></code> element with its
997: <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>
998: 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
999: the control non-interactive and to prevent its value from being
1000: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
1.48 mike 1001: attribute controls focus.<dl class="domintro"><dt><var title="">keygen</var> . <code title="attr-keygen-type">type</code></dt>
1.9 mike 1002:
1003: <dd>
1004:
1005: <p>Returns the string "<code title="">keygen</code>".</p>
1006:
1007: </dd>
1008:
1009: </dl><p class="note">This specification does not specify how the private
1010: key generated is to be used. It is expected that after receiving the
1.48 mike 1011: <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 1012: server will generate a client certificate and offer it back to the
1013: user for download; this certificate, once downloaded and stored in
1014: the key store along with the private key, can then be used to
1.88 mike 1015: authenticate to services that use TLS and certificate
1.9 mike 1016: authentication.</p><!-- how does the UA know which private key is associated with a
1017: certificate it gets back after the server has taken the public key
1018: created by <keygen> and turned it into a client cert? --><div class="example">
1019:
1020: <p>To generate a key pair, add the private key to the user's key
1021: store, and submit the public key to the server, markup such as the
1022: following can be used:</p>
1023:
1.22 mike 1024: <pre><form action="processkey.cgi" method="post" enctype="multipart/form-data">
1.9 mike 1025: <p><keygen name="key"></p>
1026: <p><input type=submit value="Submit key..."></p>
1027: </form></pre>
1028:
1029: <p>The server will then receive a form submission with a packaged
1030: RSA public key as the value of "<code title="">key</code>". This
1031: can then be used for various purposes, such as generating a client
1032: certificate, as mentioned above.</p>
1033:
1.48 mike 1034: </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 1035: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1036: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1.11 mike 1037: <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 1038: <dt>Contexts in which this element may be used:</dt>
1039: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1040: <dt>Content model:</dt>
1041: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1042: <dt>Content attributes:</dt>
1043: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1044: <dd><code title="attr-output-for"><a href="#attr-output-for">for</a></code></dd>
1045: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1046: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
1047: <dt>DOM interface:</dt>
1048: <dd>
1049: <pre class="idl">interface <dfn id="htmloutputelement">HTMLOutputElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 1050: [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>;
1051: 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>;
1052: 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>;
1053:
1054: 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>;
1055: 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>;
1056: 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>;
1057:
1058: 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>;
1059: 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>;
1060: 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>;
1061: 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>();
1062: 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 1063:
1.48 mike 1064: 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 1065: };</pre>
1066: </dd>
1.48 mike 1067: </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
1068: calculation.<p>The <dfn id="attr-output-for" title="attr-output-for"><code>for</code></dfn> content
1.9 mike 1069: attribute allows an explicit relationship to be made between the
1070: result of a calculation and the elements that represent the values
1071: that went into the calculation or that otherwise influenced the
1072: calculation. The <code title="attr-output-for"><a href="#attr-output-for">for</a></code> attribute,
1073: if specified, must contain a string consisting of an <a href="common-microsyntaxes.html#unordered-set-of-unique-space-separated-tokens">unordered
1074: set of unique space-separated tokens</a>, each of which must have
1075: the value of an ID of an element in the same
1.48 mike 1076: <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 1077: explicitly associate the <code><a href="#the-output-element">output</a></code> element with its
1078: <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 1079: 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 1080:
1081: <dd>
1082:
1083: <p>Returns the element's current value.</p>
1084:
1085: <p>Can be set, to change the value.</p>
1086:
1087: </dd>
1088:
1.48 mike 1089: <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 1090:
1091: <dd>
1092:
1093: <p>Returns the element's current default value.</p>
1094:
1095: <p>Can be set, to change the default value.</p>
1096:
1097: </dd>
1098:
1.48 mike 1099: <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 1100:
1101: <dd>
1102:
1103: <p>Returns the string "<code title="">output</code>".</p>
1104:
1105: </dd>
1106:
1107: </dl><div class="example">
1108:
1109: <p>A simple calculator could use <code><a href="#the-output-element">output</a></code> for its
1110: display of calculated results:</p>
1111:
1112: <pre><form onsubmit="return false">
1113: <input name=a type=number step=any> +
1114: <input name=b type=number step=any> =
1.32 mike 1115: <output onforminput="value = a.valueAsNumber + b.valueAsNumber"></output>
1.9 mike 1116: </form></pre>
1117:
1.48 mike 1118: </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 1119: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1120: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1121: <dd><a href="forms.html#category-label" title="category-label">Labelable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
1122: <dt>Contexts in which this element may be used:</dt>
1123: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1124: <dt>Content model:</dt>
1125: <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>
1126: <dt>Content attributes:</dt>
1127: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1128: <dd><code title="attr-progress-value"><a href="#attr-progress-value">value</a></code></dd>
1129: <dd><code title="attr-progress-max"><a href="#attr-progress-max">max</a></code></dd>
1130: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1131: <dt>DOM interface:</dt>
1132: <dd>
1133: <pre class="idl">interface <dfn id="htmlprogresselement">HTMLProgressElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 1134: 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>;
1135: 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>;
1136: 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>;
1137: 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>;
1138: 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 1139: };</pre>
1140: </dd>
1.48 mike 1141: </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 1142: completion progress of a task. The progress is either indeterminate,
1143: indicating that progress is being made but that it is not clear how
1144: much more work remains to be done before the task is complete
1145: (e.g. because the task is waiting for a remote host to respond), or
1146: the progress is a number in the range zero to a maximum, giving the
1.48 mike 1147: fraction of work that has so far been completed.<p>There are two attributes that determine the current task
1148: completion represented by the element.<p>The <dfn id="attr-progress-value" title="attr-progress-value"><code>value</code></dfn>
1.11 mike 1149: attribute specifies how much of the task has been completed, and the
1150: <dfn id="attr-progress-max" title="attr-progress-max"><code>max</code></dfn> attribute
1151: specifies how much work the task requires in total. The units are
1.48 mike 1152: arbitrary and not specified.<p>Authors are encouraged to also include the current value and the
1.11 mike 1153: maximum value inline as text inside the element, so that the
1.48 mike 1154: progress is made available to users of legacy user agents.<div class="example">
1.11 mike 1155: <p>Here is a snippet of a Web application that shows the progress
1156: of some automated task:</p>
1157: <pre><section>
1158: <h2>Task Progress</h2>
1159: <p>Progress: <progress id="p" max=100><span>0</span>%</progress></p>
1160: <script>
1161: var progressBar = document.getElementById('p');
1162: function updateProgress(newValue) {
1163: progressBar.value = newValue;
1164: progressBar.getElementsByTagName('span')[0].textContent = newValue;
1165: }
1166: </script>
1167: </section></pre>
1168: <p>(The <code>updateProgress()</code> method in this example would
1169: be called by some other code on the page to update the actual
1170: progress bar as the task progressed.)</p>
1171: </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
1172: have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" title="valid floating point number">valid
1173: floating point numbers</a>. The <code title="attr-progress-value"><a href="#attr-progress-value">value</a></code> attribute, if present, must
1174: have a value equal to or greater than zero, and less than or equal
1175: to the value of the <code title="attr-progress-max"><a href="#attr-progress-max">max</a></code>
1176: 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 1177: 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 1178: element to use for something that is just a gauge, as opposed to
1179: task progress. For instance, indicating disk space usage using
1180: <code><a href="#the-progress-element">progress</a></code> would be inappropriate. Instead, the
1.48 mike 1181: <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 1182:
1183: <dd>
1184:
1185: <p>For a determinate progress bar (one with known current and
1186: maximum values), returns the result of dividing the current value
1187: by the maximum value.</p>
1188:
1.48 mike 1189: <p>For an indeterminate progress bar, returns −1.</p>
1.11 mike 1190:
1.48 mike 1191: </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 1192: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
1193: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
1194: <dd><a href="forms.html#category-label" title="category-label">Labelable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
1195: <dt>Contexts in which this element may be used:</dt>
1196: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
1197: <dt>Content model:</dt>
1198: <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>
1199: <dt>Content attributes:</dt>
1200: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
1201: <dd><code title="attr-meter-value"><a href="#attr-meter-value">value</a></code></dd>
1202: <dd><code title="attr-meter-min"><a href="#attr-meter-min">min</a></code></dd>
1203: <dd><code title="attr-meter-max"><a href="#attr-meter-max">max</a></code></dd>
1204: <dd><code title="attr-meter-low"><a href="#attr-meter-low">low</a></code></dd>
1205: <dd><code title="attr-meter-high"><a href="#attr-meter-high">high</a></code></dd>
1206: <dd><code title="attr-meter-optimum"><a href="#attr-meter-optimum">optimum</a></code></dd>
1207: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
1208: <dt>DOM interface:</dt>
1209: <dd>
1210: <pre class="idl">interface <dfn id="htmlmeterelement">HTMLMeterElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
1.48 mike 1211: 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>;
1212: 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>;
1213: 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>;
1214: 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>;
1215: 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>;
1216: 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>;
1217: 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>;
1218: 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 1219: };</pre>
1220: </dd>
1.48 mike 1221: </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 1222: measurement within a known range, or a fractional value; for example
1223: disk usage, the relevance of a query result, or the fraction of a
1.48 mike 1224: 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 1225: indicate progress (as in a progress bar). For that role, HTML
1.48 mike 1226: 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
1227: represent a scalar value of arbitrary range — for example, it
1.11 mike 1228: would be wrong to use this to report a weight, or height, unless
1.48 mike 1229: there is a known maximum value.<p>There are six attributes that determine the semantics of the
1230: gauge represented by the element.<p>The <dfn id="attr-meter-min" title="attr-meter-min"><code>min</code></dfn> attribute
1.11 mike 1231: specifies the lower bound of the range, and the <dfn id="attr-meter-max" title="attr-meter-max"><code>max</code></dfn> attribute specifies
1232: the upper bound. The <dfn id="attr-meter-value" title="attr-meter-value"><code>value</code></dfn> attribute
1233: specifies the value to have the gauge indicate as the "measured"
1.48 mike 1234: value.<p>The other three attributes can be used to segment the gauge's
1.11 mike 1235: range into "low", "medium", and "high" parts, and to indicate which
1236: part of the gauge is the "optimum" part. The <dfn id="attr-meter-low" title="attr-meter-low"><code>low</code></dfn> attribute specifies
1237: 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
1238: 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
1239: gives the position that is "optimum"; if that is higher than the
1240: "high" value then this indicates that the higher the value, the
1241: better; if it's lower than the "low" mark then it indicates that
1242: lower values are better, and naturally if it is in between then it
1.48 mike 1243: 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 1244: 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,
1245: must have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" title="valid floating point
1.48 mike 1246: 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 1247: attribute is specified, then let <var title="">minimum</var> be that
1.48 mike 1248: 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 1249: attribute is specified, then let <var title="">maximum</var> be that
1.48 mike 1250: 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>
1251: <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>
1252: <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>
1253: <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>
1254: <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 1255: </ul><p class="note">If no minimum or maximum is specified, then the
1.11 mike 1256: range is assumed to be 0..1, and the value thus has to be within
1.48 mike 1257: that range.<p>Authors are encouraged to include a textual representation of the
1.11 mike 1258: gauge's state in the element's contents, for users of user agents
1.48 mike 1259: that do not support the <code><a href="#the-meter-element">meter</a></code> element.<div class="example">
1.11 mike 1260:
1261: <p>The following examples show three gauges that would all be
1262: three-quarters full:</p>
1263:
1264: <pre>Storage space usage: <meter value=6 max=8>6 blocks used (out of 8 total)</meter>
1265: Voter turnout: <meter value=0.75><img alt="75%" src="graph75.png"></meter>
1266: Tickets sold: <meter min="0" max="100" value="75"></meter></pre>
1267:
1268: <p>The following example is incorrect use of the element, because
1269: it doesn't give a range (and since the default maximum is 1, both
1270: of the gauges would end up looking maxed out):</p>
1271:
1272: <pre class="bad"><p>The grapefruit pie had a radius of <meter value=12>12cm</meter>
1273: and a height of <meter value=2>2cm</meter>.</p> <!-- <strong>BAD!</strong> --></pre>
1274:
1275: <p>Instead, one would either not include the meter element, or use
1276: the meter element with a defined range to give the dimensions in
1277: context compared to other pies:</p>
1278:
1279: <pre><p>The grapefruit pie had a radius of 12cm and a height of
1280: 2cm.</p>
1281: <dl>
1282: <dt>Radius: <dd> <meter min=0 max=20 value=12>12cm</meter>
1283: <dt>Height: <dd> <meter min=0 max=10 value=2>2cm</meter>
1284: </dl></pre>
1285:
1286: </div><p>There is no explicit way to specify units in the
1287: <code><a href="#the-meter-element">meter</a></code> element, but the units may be specified in the
1.48 mike 1288: <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 1289:
1290: <p>The example above could be extended to mention the units:</p>
1291:
1292: <pre><dl>
1293: <dt>Radius: <dd> <meter min=0 max=20 value=12 title="centimeters">12cm</meter>
1294: <dt>Height: <dd> <meter min=0 max=10 value=2 title="centimeters">2cm</meter>
1295: </dl></pre>
1296:
1297: </div><div class="example">
1298: <p>The following markup:</p>
1299: <pre><h3>Suggested groups</h3>
1300: <menu type="toolbar">
1301: <a href="?cmd=hsg" onclick="hideSuggestedGroups()">Hide suggested groups</a>
1302: </menu>
1303: <ul>
1304: <li>
1305: <p><a href="/group/comp.infosystems.www.authoring.stylesheets/view">comp.infosystems.www.authoring.stylesheets</a> -
1306: <a href="/group/comp.infosystems.www.authoring.stylesheets/subscribe">join</a></p>
1307: <p>Group description: <strong>Layout/presentation on the WWW.</strong></p>
1308: <p><strong><meter value="0.5">Moderate activity,</meter></strong> Usenet, 618 subscribers</p>
1309: </li>
1310: <li>
1311: <p><a href="/group/netscape.public.mozilla.xpinstall/view">netscape.public.mozilla.xpinstall</a> -
1312: <a href="/group/netscape.public.mozilla.xpinstall/subscribe">join</a></p>
1313: <p>Group description: <strong>Mozilla XPInstall discussion.</strong></p>
1314: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 22 subscribers</p>
1315: </li>
1316: <li>
1317: <p><a href="/group/mozilla.dev.general/view">mozilla.dev.general</a> -
1318: <a href="/group/mozilla.dev.general/subscribe">join</a></p>
1319: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 66 subscribers</p>
1320: </li>
1321: </ul></pre>
1322: <p>Might be rendered as follows:</p>
1.48 mike 1323: <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 1324: </div><p>User agents combine the value of
1325: the <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute and the other
1.11 mike 1326: attributes to provide context-sensitive help or inline text
1.48 mike 1327: detailing the actual values.<div class="example">
1.11 mike 1328: <p>For example, the following snippet:</p>
1329: <pre><meter min=0 max=60 value=23.2 title=seconds></meter></pre>
1330: <p>...might cause the user agent to display a gauge with a tooltip
1331: saying "Value: 23.2 out of 60." on one line and "seconds" on a
1332: second line.</p>
1333: </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
1334: explicitly associate the <code><a href="#the-meter-element">meter</a></code> element with its
1.48 mike 1335: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>.<div class="example">
1.11 mike 1336:
1337: <p>The following example shows how a gauge could fall back to
1338: localized or pretty-printed text.</p>
1339:
1.48 mike 1340: <pre><p>Disk usage: <meter min=0 value=170261928 max=233257824>170 261 928 bytes used
1341: out of 233 257 824 bytes available</meter></p></pre>
1.11 mike 1342:
1.48 mike 1343: </div>
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