Annotation of html5/spec-author-view/the-button-element.html, revision 1.370
1.354 mike 1: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"><!-- when publishing, change bits marked ZZZ
2: ZZZ: Set PUB to 1 for TR/ drafts, 0 for dev drafts; PUB-Y lines are used if it's 1 and PUB-N lines if it's 0.
3: ZZZ: Set YEAR, SHORTDAY (month/day), and LONGDAY accordingly. They are used by the INSERT FOO bits below.
4: --><html class="split chapter" lang="en-US-x-Hixie"><meta content="text/html; charset=ascii" http-equiv="Content-Type"><title>4.10.8 The button element — HTML5 (Edition for Web Authors)</title><meta content="width=device-width;" name="viewport"><meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible"><link href="whatwg.css" rel="stylesheet"><style type="text/css">
1.1 mike 5: pre { margin-left: 2em; white-space: pre-wrap; }
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1.23 mike 49: dl.domintro { color: green; margin: 2em 0 2em 2em; padding: 0.5em 1em; border: none; background: #DDFFDD; }
1.1 mike 50: hr + dl.domintro, div.impl + dl.domintro { margin-top: 2.5em; margin-bottom: 1.5em; }
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1.306 mike 69: p > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]),
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1.1 mike 71:
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1.1 mike 121:
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1.14 mike 164: body.dfnEnabled dfn { cursor: pointer; }
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1.1 mike 183: #configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
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1.121 mike 188:
1.321 mike 189: fieldset { margin: 1em; padding: 0.5em 1em; }
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1.293 mike 191: fieldset > :last-child { margin-bottom: 0; }
1.321 mike 192: fieldset p { margin: 0.5em 0; }
193:
1.370 ! mike 194: </style><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><link href="style.css" rel="stylesheet"><script src="link-fixup.js"></script><style type="text/css">
1.1 mike 195:
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1.136 mike 202: .matrix, .matrix td { border: hidden; text-align: right; }
1.1 mike 203: .matrix { margin-left: 2em; }
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1.9 mike 237: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
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1.11 mike 241: .details-example img { vertical-align: top; }
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1.26 mike 243: #named-character-references-table {
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1.26 mike 249: -moz-column-gap: 1em;
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252: }
1.257 mike 253: #named-character-references-table > table > tbody > tr > td:first-child + td,
1.26 mike 254: #named-character-references-table > table > tbody > tr > td:last-child { text-align: center; }
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1.257 mike 256: #named-character-references-table > table > tbody > tr#entity-CounterClockwiseContourIntegral > td:first-child { font-size: 0.5em; }
1.26 mike 257:
1.35 mike 258: .glyph.control { color: red; }
259:
1.38 mike 260: @font-face {
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280:
1.25 mike 281: </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">
1.157 mike 282: function getCookie(name) {
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1.9 mike 290: }
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1.9 mike 296: }
1.157 mike 297: return null;
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1.354 mike 317: </script><link href="common-input-element-attributes.html" rel="prev" title="4.10.7.2 Common input element attributes">
1.160 mike 318: <link href="Overview.html#contents" rel="index" title="Table of contents">
319: <link href="association-of-controls-and-forms.html" rel="next" title="4.10.18 Association of controls and forms">
320: <body onload="fixBrokenLink(); init()"><div class="head" id="head">
1.9 mike 321: <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 322:
1.370 ! mike 323: <h1>HTML5 <span class="edition">Edition for Web Authors</span> <span class="rcsrevision">revision 1.4641</span></h1>
1.9 mike 324: </div><div>
1.320 mike 325: <a href="common-input-element-attributes.html">← 4.10.7.2 Common input element attributes</a> –
1.160 mike 326: <a href="Overview.html#contents">Table of contents</a> –
1.320 mike 327: <a href="association-of-controls-and-forms.html">4.10.18 Association of controls and forms →</a>
1.160 mike 328: <ol class="toc"><li><ol><li><ol><li><a href="the-button-element.html#the-button-element" id="x4.10.8-the-button-element"><span class="secno">4.10.8 </span>The <code>button</code> element</a><li><a href="the-button-element.html#the-select-element" id="x4.10.9-the-select-element"><span class="secno">4.10.9 </span>The <code>select</code> element</a><li><a href="the-button-element.html#the-datalist-element" id="x4.10.10-the-datalist-element"><span class="secno">4.10.10 </span>The <code>datalist</code> element</a><li><a href="the-button-element.html#the-optgroup-element" id="x4.10.11-the-optgroup-element"><span class="secno">4.10.11 </span>The <code>optgroup</code> element</a><li><a href="the-button-element.html#the-option-element" id="x4.10.12-the-option-element"><span class="secno">4.10.12 </span>The <code>option</code> element</a><li><a href="the-button-element.html#the-textarea-element" id="x4.10.13-the-textarea-element"><span class="secno">4.10.13 </span>The <code>textarea</code> element</a><li><a href="the-button-element.html#the-keygen-element" id="x4.10.14-the-keygen-element"><span class="secno">4.10.14 </span>The <code>keygen</code> element</a><li><a href="the-button-element.html#the-output-element" id="x4.10.15-the-output-element"><span class="secno">4.10.15 </span>The <code>output</code> element</a><li><a href="the-button-element.html#the-progress-element" id="x4.10.16-the-progress-element"><span class="secno">4.10.16 </span>The <code>progress</code> element</a><li><a href="the-button-element.html#the-meter-element" id="x4.10.17-the-meter-element"><span class="secno">4.10.17 </span>The <code>meter</code> element</a></ol></ol></ol></div>
1.156 mike 329:
1.202 mike 330: <h4 id="the-button-element"><span class="secno">4.10.8 </span>The <dfn><code>button</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 331: <dd><a href="content-models.html#flow-content" id="flow-content-125">Flow content</a>.</dd>
1.363 mike 332: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-136">Phrasing content</a>.</dd>
1.156 mike 333: <dd><a href="content-models.html#interactive-content" id="interactive-content-14">Interactive content</a>.</dd>
1.202 mike 334: <dd><a href="forms.html#category-listed" id="category-listed-5" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-3" title="category-label">labelable</a>, and <a href="forms.html#category-submit" id="category-submit-4" title="category-submit">submittable</a> <a href="forms.html#form-associated-element" id="form-associated-element-9">form-associated element</a>.</dd>
1.203 mike 335: <dt>Contexts in which this element can be used:</dt>
1.363 mike 336: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-137">phrasing content</a> is expected.</dd>
1.9 mike 337: <dt>Content model:</dt>
1.363 mike 338: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-138">Phrasing content</a>, but there must be no <a href="content-models.html#interactive-content" id="interactive-content-15">interactive content</a> descendant.</dd>
1.9 mike 339: <dt>Content attributes:</dt>
1.321 mike 340: <dd><a href="elements.html#global-attributes" id="global-attributes-88">Global attributes</a></dd>
1.156 mike 341: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-1">autofocus</a></code></dd>
1.370 ! mike 342: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-13">disabled</a></code></dd>
1.262 mike 343: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-49">form</a></code></dd>
1.156 mike 344: <dd><code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction" id="formaction-26">formaction</a></code></dd>
345: <dd><code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype" id="formenctype-26">formenctype</a></code></dd>
346: <dd><code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod" id="formmethod-26">formmethod</a></code></dd>
347: <dd><code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-27">formnovalidate</a></code></dd>
348: <dd><code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget" id="formtarget-26">formtarget</a></code></dd>
349: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-37">name</a></code></dd>
1.213 mike 350: <dd><code title="attr-button-type"><a href="#attr-button-type" id="type-75">type</a></code></dd>
1.255 mike 351: <dd><code title="attr-button-value"><a href="#attr-button-value" id="value-30">value</a></code></dd>
1.9 mike 352: <dt>DOM interface:</dt>
353: <dd>
1.321 mike 354: <pre class="idl">interface <dfn id="htmlbuttonelement">HTMLButtonElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-96">HTMLElement</a> {
1.162 mike 355: 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>;
356: 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>;
357: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-5">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
358: 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>;
359: 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>;
360: 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>;
361: 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>;
362: 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>;
363: 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>;
364: 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>;
365: 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>;
366:
367: 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>;
368: 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>;
369: 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>;
370: 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>();
371: 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 372:
1.162 mike 373: 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 374: };</pre>
375: </dd>
1.162 mike 376: </dl><p>The <code><a href="#the-button-element" id="button-11">button</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a
1.160 mike 377: button. <p>The element is a <a href="forms.html#concept-button" id="concept-button-4" title="concept-button">button</a>.<p>The <dfn id="attr-button-type" title="attr-button-type"><code>type</code></dfn>
1.9 mike 378: attribute controls the behavior of the button when it is activated.
1.304 mike 379: It is an <a href="common-microsyntaxes.html#enumerated-attribute" id="enumerated-attribute-9">enumerated attribute</a>. The following table
1.160 mike 380: lists the keywords and states for the attribute — the keywords
1.9 mike 381: in the left column map to the states in the cell in the second
1.160 mike 382: column on the same row as the keyword.<table><thead><tr><th> Keyword
383: <th> State
384: <th> Brief description
385: <tbody><tr><td><dfn id="attr-button-type-submit" title="attr-button-type-submit"><code>submit</code></dfn>
1.162 mike 386: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.160 mike 387: <td>Submits the form.
388: <tr><td><dfn id="attr-button-type-reset" title="attr-button-type-reset"><code>reset</code></dfn>
1.162 mike 389: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-reset-state" title='Read about this "Reset Button" reference in the full HTML5 spec.'>Reset Button</a>
1.160 mike 390: <td>Resets the form.
391: <tr><td><dfn id="attr-button-type-button" title="attr-button-type-button"><code>button</code></dfn>
1.162 mike 392: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-button-state" title='Read about this "Button" reference in the full HTML5 spec.'>Button</a>
1.160 mike 393: <td>Does nothing.
1.162 mike 394: </table><p>The <i>missing value default</i> is the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.213 mike 395: state.<p>If the <code title="attr-button-type"><a href="#attr-button-type" id="type-76">type</a></code> attribute is in
1.162 mike 396: the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.262 mike 397: state, the element is specifically a <a href="forms.html#concept-submit-button" id="concept-submit-button-2" title="concept-submit-button">submit button</a>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-50">form</a></code> attribute is used to
1.156 mike 398: explicitly associate the <code><a href="#the-button-element" id="button-12">button</a></code> element with its
399: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-8">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-38">name</a></code>
1.370 ! mike 400: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-14">disabled</a></code> attribute is used to make
1.9 mike 401: the control non-interactive and to prevent its value from being
1.156 mike 402: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-2">autofocus</a></code>
403: attribute controls focus. The <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction" id="formaction-27">formaction</a></code>, <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype" id="formenctype-27">formenctype</a></code>, <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod" id="formmethod-27">formmethod</a></code>, <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-28">formnovalidate</a></code>, and <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget" id="formtarget-27">formtarget</a></code> attributes are
1.160 mike 404: <a href="association-of-controls-and-forms.html#attributes-for-form-submission" id="attributes-for-form-submission-3">attributes for form submission</a>.<p class="note">The <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-29">formnovalidate</a></code> attribute can
1.9 mike 405: be used to make submit buttons that do not trigger the constraint
1.160 mike 406: validation.<p>The <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction" id="formaction-28">formaction</a></code>, <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype" id="formenctype-28">formenctype</a></code>, <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod" id="formmethod-28">formmethod</a></code>, <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-30">formnovalidate</a></code>, and <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget" id="formtarget-28">formtarget</a></code> must not be specified
1.213 mike 407: if the element's <code title="attr-button-type"><a href="#attr-button-type" id="type-77">type</a></code>
1.162 mike 408: attribute is not in the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.160 mike 409: state.<p>The <dfn id="attr-button-value" title="attr-button-value"><code>value</code></dfn>
1.9 mike 410: attribute gives the element's value for the purposes of form
1.162 mike 411: submission. The element's <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#concept-fe-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a> is the value of the element's
1.255 mike 412: <code title="attr-button-value"><a href="#attr-button-value" id="value-31">value</a></code> attribute, if there is
1.160 mike 413: one, or the empty string otherwise.<p class="note">A button (and its value) is only included in the
1.9 mike 414: form submission if the button itself was used to initiate the form
1.160 mike 415: submission.<div class="example">
1.9 mike 416:
417: <p>The following button is labeled "Show hint" and pops up a dialog
418: box when activated:</p>
419:
420: <pre><button type=button
421: onclick="alert('This 15-20 minute piece was composed by George Gershwin.')">
422: Show hint
423: </button></pre>
424:
1.202 mike 425: </div><h4 id="the-select-element"><span class="secno">4.10.9 </span>The <dfn><code>select</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 426: <dd><a href="content-models.html#flow-content" id="flow-content-126">Flow content</a>.</dd>
1.363 mike 427: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-139">Phrasing content</a>.</dd>
1.156 mike 428: <dd><a href="content-models.html#interactive-content" id="interactive-content-16">Interactive content</a>.</dd>
1.202 mike 429: <dd><a href="forms.html#category-listed" id="category-listed-6" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-4" title="category-label">labelable</a>, <a href="forms.html#category-submit" id="category-submit-5" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" id="category-reset-2" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-10">form-associated element</a>.</dd>
1.203 mike 430: <dt>Contexts in which this element can be used:</dt>
1.363 mike 431: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-140">phrasing content</a> is expected.</dd>
1.9 mike 432: <dt>Content model:</dt>
1.191 mike 433: <dd>Zero or more <code><a href="#the-option-element" id="option-9">option</a></code> or <code><a href="#the-optgroup-element" id="optgroup-3">optgroup</a></code> elements.</dd>
1.9 mike 434: <dt>Content attributes:</dt>
1.321 mike 435: <dd><a href="elements.html#global-attributes" id="global-attributes-89">Global attributes</a></dd>
1.156 mike 436: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-3">autofocus</a></code></dd>
1.370 ! mike 437: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-15">disabled</a></code></dd>
1.262 mike 438: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-51">form</a></code></dd>
1.366 mike 439: <dd><code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-34">multiple</a></code></dd>
1.156 mike 440: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-39">name</a></code></dd>
1.234 mike 441: <dd><code title="attr-select-required"><a href="#attr-select-required" id="required-28">required</a></code></dd>
1.156 mike 442: <dd><code title="attr-select-size"><a href="#attr-select-size" id="size-30">size</a></code></dd>
1.9 mike 443: <dt>DOM interface:</dt>
444: <dd>
1.321 mike 445: <pre class="idl">interface <dfn id="htmlselectelement">HTMLSelectElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-97">HTMLElement</a> {
1.162 mike 446: 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>;
447: 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>;
448: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-6">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
449: 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>;
450: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
1.165 mike 451: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-required" title='Read about this "required" reference in the full HTML5 spec.'>required</a>;
1.162 mike 452: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-size" title='Read about this "size" reference in the full HTML5 spec.'>size</a>;
1.160 mike 453:
1.162 mike 454: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
1.160 mike 455:
1.162 mike 456: readonly attribute <a href="urls.html#htmloptionscollection" id="htmloptionscollection-3">HTMLOptionsCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a>;
457: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-length" title='Read about this "length" reference in the full HTML5 spec.'>length</a>;
1.291 mike 458: 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);
459: any <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-nameditem" title='Read about this "namedItem" reference in the full HTML5 spec.'>namedItem</a>(in DOMString name);
1.321 mike 460: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-add" title='Read about this "add" reference in the full HTML5 spec.'>add</a>(in <a href="elements.html#htmlelement" id="htmlelement-98">HTMLElement</a> element, in optional <a href="elements.html#htmlelement" id="htmlelement-99">HTMLElement</a> before);
461: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-add" title='Read about this "add" reference in the full HTML5 spec.'>add</a>(in <a href="elements.html#htmlelement" id="htmlelement-100">HTMLElement</a> element, in long before);
1.162 mike 462: 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);
463:
1.202 mike 464: readonly attribute <a href="urls.html#htmlcollection" id="htmlcollection-34">HTMLCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedoptions" title='Read about this "selectedOptions" reference in the full HTML5 spec.'>selectedOptions</a>;
1.162 mike 465: 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>;
466: 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>;
467:
468: 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>;
469: 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>;
470: 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>;
471: 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>();
472: 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 473:
1.162 mike 474: 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 475: };</pre>
476: </dd>
477: </dl><!-- Proposals for v2:
478: * <select value=""> as an alternative to <option selected>
479: http://developers.slashdot.org/comments.pl?sid=426306&cid=22142072
1.11 mike 480: <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 481: src="/js/flightcity.js"></SCRIPT></select> which is the kind of thing that could be much simpler with <select value="PEK">
1.234 mike 482: --><p>The <code><a href="#the-select-element" id="select-18">select</a></code> element represents a control for
1.160 mike 483: selecting amongst a set of options.<p>The <dfn id="attr-select-multiple" title="attr-select-multiple"><code>multiple</code></dfn>
1.156 mike 484: attribute is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-13">boolean attribute</a>. If the attribute is
1.234 mike 485: present, then the <code><a href="#the-select-element" id="select-19">select</a></code> element
1.162 mike 486: <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a control for selecting zero or more options
1.156 mike 487: from the <a href="#concept-select-option-list" id="concept-select-option-list-1" title="concept-select-option-list">list of
1.9 mike 488: options</a>. If the attribute is absent, then the
1.234 mike 489: <code><a href="#the-select-element" id="select-20">select</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a control for
1.160 mike 490: selecting a single option from the <a href="#concept-select-option-list" id="concept-select-option-list-2" title="concept-select-option-list">list of options</a>.<p>The <dfn id="attr-select-size" title="attr-select-size"><code>size</code></dfn>
1.156 mike 491: attribute gives the number of options to show to the user. The <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size" id="size-26">size</a></code> attribute, if specified, must
492: have a value that is a <a href="common-microsyntaxes.html#valid-non-negative-integer" id="valid-non-negative-integer-10">valid non-negative integer</a>
1.366 mike 493: greater than zero. If the <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-35">multiple</a></code> attribute is present,
1.156 mike 494: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size" id="size-27">size</a></code> attribute's
1.366 mike 495: default value is 4. If the <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-36">multiple</a></code> attribute is absent,
1.156 mike 496: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size" id="size-28">size</a></code> attribute's
1.160 mike 497: default value is 1.<p>The <dfn id="concept-select-option-list" title="concept-select-option-list">list of options</dfn>
1.234 mike 498: for a <code><a href="#the-select-element" id="select-21">select</a></code> element consists of all the
499: <code><a href="#the-option-element" id="option-10">option</a></code> element children of the <code><a href="#the-select-element" id="select-22">select</a></code>
1.191 mike 500: element, and all the <code><a href="#the-option-element" id="option-11">option</a></code> element children of all the
1.234 mike 501: <code><a href="#the-optgroup-element" id="optgroup-4">optgroup</a></code> element children of the <code><a href="#the-select-element" id="select-23">select</a></code>
1.322 mike 502: element, in <a href="infrastructure.html#tree-order" id="tree-order-7">tree order</a>.<p>The <dfn id="attr-select-required" title="attr-select-required"><code>required</code></dfn>
1.156 mike 503: attribute is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-14">boolean attribute</a>. When specified, the
1.138 mike 504: user will be required to select a value before submitting the
1.234 mike 505: form.<p>If a <code><a href="#the-select-element" id="select-24">select</a></code> element has a <code title="attr-select-required"><a href="#attr-select-required" id="required-29">required</a></code> attribute specified,
1.366 mike 506: does not have a <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-37">multiple</a></code>
1.162 mike 507: attribute specified, and has a <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-select-size" title='Read about this "display size" reference in the full HTML5 spec.'>display size</a> of 1; and if the
1.156 mike 508: <a href="#concept-option-value" id="concept-option-value-0" title="concept-option-value">value</a> of the first
1.234 mike 509: <code><a href="#the-option-element" id="option-12">option</a></code> element in the <code><a href="#the-select-element" id="select-25">select</a></code> element's
1.156 mike 510: <a href="#concept-select-option-list" id="concept-select-option-list-3" title="concept-select-option-list">list of options</a> (if
1.191 mike 511: any) is the empty string, and that <code><a href="#the-option-element" id="option-13">option</a></code> is not <a href="#concept-option-disabled" id="concept-option-disabled-0" title="concept-option-disabled">disabled</a>, and, finally, that
1.234 mike 512: <code><a href="#the-option-element" id="option-14">option</a></code> element's parent node is the <code><a href="#the-select-element" id="select-26">select</a></code>
1.190 mike 513: element (and not an <code><a href="#the-optgroup-element" id="optgroup-5">optgroup</a></code> element), then that
1.234 mike 514: <code><a href="#the-option-element" id="option-15">option</a></code> is the <code><a href="#the-select-element" id="select-27">select</a></code> element's
1.262 mike 515: <dfn id="placeholder-label-option">placeholder label option</dfn>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-52">form</a></code> attribute is used to
1.234 mike 516: explicitly associate the <code><a href="#the-select-element" id="select-28">select</a></code> element with its
1.156 mike 517: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-9">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-40">name</a></code>
1.370 ! mike 518: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-16">disabled</a></code> attribute is used to make
1.9 mike 519: the control non-interactive and to prevent its value from being
1.156 mike 520: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-4">autofocus</a></code>
1.162 mike 521: 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 522:
523: <dd>
524:
525: <p>Returns "<code title="">select-multiple</code>" if the element
1.366 mike 526: has a <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-38">multiple</a></code>
1.9 mike 527: attribute, and "<code title="">select-one</code>"
528: otherwise.</p>
529:
530: </dd>
531:
1.162 mike 532: <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 533:
534: <dd>
535:
1.156 mike 536: <p>Returns an <code><a href="urls.html#htmloptionscollection" id="htmloptionscollection-4">HTMLOptionsCollection</a></code> of the <a href="#concept-select-option-list" id="concept-select-option-list-4" title="concept-select-option-list">list of options</a>.</p>
1.9 mike 537:
538: </dd>
539:
1.162 mike 540: <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 541: <dd>
1.156 mike 542: <p>Returns the number of elements in the <a href="#concept-select-option-list" id="concept-select-option-list-5" title="concept-select-option-list">list of options</a>.</p>
1.234 mike 543: <p>When set to a smaller number, truncates the number of <code><a href="#the-option-element" id="option-16">option</a></code> elements in the <code><a href="#the-select-element" id="select-29">select</a></code>.</p>
544: <p>When set to a greater number, adds new blank <code><a href="#the-option-element" id="option-17">option</a></code> elements to the <code><a href="#the-select-element" id="select-30">select</a></code>.</p>
1.9 mike 545: </dd>
546:
1.162 mike 547: <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 548: <dt><var title="">select</var>[<var title="">index</var>]</dt>
549: <dd>
1.322 mike 550: <p>Returns the item with index <var title="">index</var> from the <a href="#concept-select-option-list" id="concept-select-option-list-6" title="concept-select-option-list">list of options</a>. The items are sorted in <a href="infrastructure.html#tree-order" id="tree-order-8">tree order</a>.</p>
1.9 mike 551: <p>Returns null if <var title="">index</var> is out of range.</p>
552: </dd>
553:
1.162 mike 554: <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 555: <dd>
1.201 mike 556: <p>Returns the item with <a href="elements.html#concept-id" id="concept-id-17" title="concept-id">ID</a> or <code title="attr-option-name"><a href="obsolete.html#attr-option-name" id="name-59">name</a></code> <var title="">name</var> from the <a href="#concept-select-option-list" id="concept-select-option-list-7" title="concept-select-option-list">list of options</a>.</p>
1.162 mike 557: <p>If there are multiple matching items, then a <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a></code> object containing all those elements is returned.</p>
1.201 mike 558: <p>Returns null if no element with that <a href="elements.html#concept-id" id="concept-id-18" title="concept-id">ID</a> could be found.</p>
1.9 mike 559: </dd>
560:
1.162 mike 561: <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 562: <dd>
563: <p>Inserts <var title="">element</var> before the node given by <var title="">before</var>.</p>
564: <p>The <var title="">before</var> argument can be a number, in
565: which case <var title="">element</var> is inserted before the item
1.156 mike 566: with that number, or an element from the <a href="#concept-select-option-list" id="concept-select-option-list-8" title="concept-select-option-list">list of options</a>, in
1.9 mike 567: which case <var title="">element</var> is inserted before that
568: element.</p>
569: <p>If <var title="">before</var> is omitted, null, or a number out
570: of range, then <var title="">element</var> will be added at the
571: end of the list.</p>
1.156 mike 572: <p>This method will throw a <code><a href="urls.html#hierarchy_request_err" id="hierarchy_request_err-5">HIERARCHY_REQUEST_ERR</a></code>
1.9 mike 573: exception if <var title="">element</var> is an ancestor of the
1.191 mike 574: element into which it is to be inserted. If <var title="">element</var> is not an <code><a href="#the-option-element" id="option-18">option</a></code> or
1.190 mike 575: <code><a href="#the-optgroup-element" id="optgroup-6">optgroup</a></code> element, then the method does nothing.</p>
1.9 mike 576: </dd>
577:
1.162 mike 578: <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 579:
580: <dd>
581:
1.202 mike 582: <p>Returns an <code><a href="urls.html#htmlcollection" id="htmlcollection-35">HTMLCollection</a></code> of the <a href="#concept-select-option-list" id="concept-select-option-list-9" title="concept-select-option-list">list of options</a> that are
1.9 mike 583: selected.</p>
584:
585: </dd>
586:
1.162 mike 587: <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 588:
589: <dd>
590:
591: <p>Returns the index of the first selected item, if any, or
1.160 mike 592: −1 if there is no selected item.</p>
1.9 mike 593:
594: <p>Can be set, to change the selection.</p>
595:
596: </dd>
597:
1.162 mike 598: <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 599:
600: <dd>
601:
1.162 mike 602: <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 603: first selected item, if any, or the empty string if there is no
604: selected item.</p>
605:
606: <p>Can be set, to change the selection.</p>
607:
608: </dd>
609:
610: </dl><div class="example">
611:
1.234 mike 612: <p>The following example shows how a <code><a href="#the-select-element" id="select-31">select</a></code> element
1.9 mike 613: can be used to offer the user with a set of options from which the
614: user can select a single option. The default option is
615: preselected.</p>
616:
617: <pre><p>
618: <label for="unittype">Select unit type:</label>
619: <select id="unittype" name="unittype">
620: <option value="1"> Miner </option>
621: <option value="2"> Puffer </option>
622: <option value="3" selected> Snipey </option>
623: <option value="4"> Max </option>
624: <option value="5"> Firebot </option>
625: </select>
626: </p></pre>
627:
628: </div><div class="example">
629:
630: <p>Here, the user is offered a set of options from which he can
631: select any number. By default, all five options are selected.</p>
632:
633: <pre><p>
634: <label for="allowedunits">Select unit types to enable on this map:</label>
635: <select id="allowedunits" name="allowedunits" multiple>
636: <option value="1" selected> Miner </option>
637: <option value="2" selected> Puffer </option>
638: <option value="3" selected> Snipey </option>
639: <option value="4" selected> Max </option>
640: <option value="5" selected> Firebot </option>
641: </select>
642: </p></pre>
643:
1.202 mike 644: </div><h4 id="the-datalist-element"><span class="secno">4.10.10 </span>The <dfn><code>datalist</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 645: <dd><a href="content-models.html#flow-content" id="flow-content-127">Flow content</a>.</dd>
1.363 mike 646: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-141">Phrasing content</a>.</dd>
1.203 mike 647: <dt>Contexts in which this element can be used:</dt>
1.363 mike 648: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-142">phrasing content</a> is expected.</dd>
1.9 mike 649: <dt>Content model:</dt>
1.363 mike 650: <dd>Either: <a href="content-models.html#phrasing-content" id="phrasing-content-143">phrasing content</a>.</dd>
1.191 mike 651: <dd>Or: Zero or more <code><a href="#the-option-element" id="option-19">option</a></code> elements.</dd>
1.9 mike 652: <dt>Content attributes:</dt>
1.321 mike 653: <dd><a href="elements.html#global-attributes" id="global-attributes-90">Global attributes</a></dd>
1.9 mike 654: <dt>DOM interface:</dt>
655: <dd>
1.321 mike 656: <pre class="idl">interface <dfn id="htmldatalistelement">HTMLDataListElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-101">HTMLElement</a> {
1.202 mike 657: readonly attribute <a href="urls.html#htmlcollection" id="htmlcollection-36">HTMLCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-datalist-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a>;
1.9 mike 658: };</pre>
659: </dd>
1.156 mike 660: </dl><p>The <code><a href="#the-datalist-element" id="datalist-13">datalist</a></code> element represents a set of
1.191 mike 661: <code><a href="#the-option-element" id="option-20">option</a></code> elements that represent predefined options for
1.9 mike 662: other controls. The contents of the element represents fallback
1.191 mike 663: content for legacy user agents, intermixed with <code><a href="#the-option-element" id="option-21">option</a></code>
1.9 mike 664: elements that represent the predefined options. In the rendering,
1.162 mike 665: the <code><a href="#the-datalist-element" id="datalist-14">datalist</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a>
1.160 mike 666: nothing.<p>The <code><a href="#the-datalist-element" id="datalist-15">datalist</a></code> element is hooked up to an
1.366 mike 667: <code><a href="the-input-element.html#the-input-element" id="input-120">input</a></code> element using the <code title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list" id="list-29">list</a></code> attribute on the
668: <code><a href="the-input-element.html#the-input-element" id="input-121">input</a></code> element.<p>Each <code><a href="#the-option-element" id="option-22">option</a></code> element that is a descendant of the
1.156 mike 669: <code><a href="#the-datalist-element" id="datalist-16">datalist</a></code> element, that is not <a href="#concept-option-disabled" id="concept-option-disabled-1" title="concept-option-disabled">disabled</a>, and whose <a href="#concept-option-value" id="concept-option-value-1" title="concept-option-value">value</a> is a string that isn't the
670: empty string, represents a suggestion. Each suggestion has a <a href="#concept-option-value" id="concept-option-value-2" title="concept-option-value">value</a> and a <a href="#concept-option-label" id="concept-option-label-0" title="concept-option-label">label</a>.
1.9 mike 671:
1.162 mike 672: <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 673:
674: <dd>
1.202 mike 675: <p>Returns an <code><a href="urls.html#htmlcollection" id="htmlcollection-37">HTMLCollection</a></code> of the <code>options</code> elements of the table.</p>
1.9 mike 676: </dd>
677:
1.202 mike 678: </dl><h4 id="the-optgroup-element"><span class="secno">4.10.11 </span>The <dfn><code>optgroup</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.9 mike 679: <dd>None.</dd>
1.203 mike 680: <dt>Contexts in which this element can be used:</dt>
1.234 mike 681: <dd>As a child of a <code><a href="#the-select-element" id="select-32">select</a></code> element.</dd>
1.9 mike 682: <dt>Content model:</dt>
1.191 mike 683: <dd>Zero or more <code><a href="#the-option-element" id="option-23">option</a></code> elements.</dd>
1.9 mike 684: <dt>Content attributes:</dt>
1.321 mike 685: <dd><a href="elements.html#global-attributes" id="global-attributes-91">Global attributes</a></dd>
1.156 mike 686: <dd><code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled" id="disabled-3">disabled</a></code></dd>
1.304 mike 687: <dd><code title="attr-optgroup-label"><a href="#attr-optgroup-label" id="label-31">label</a></code></dd>
1.9 mike 688: <dt>DOM interface:</dt>
689: <dd>
1.321 mike 690: <pre class="idl">interface <dfn id="htmloptgroupelement">HTMLOptGroupElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-102">HTMLElement</a> {
1.162 mike 691: 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>;
692: 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 693: };</pre>
694: </dd>
1.190 mike 695: </dl><!-- v2: make optgroups selectable if they have a value. --><p>The <code><a href="#the-optgroup-element" id="optgroup-7">optgroup</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a group of
1.191 mike 696: <code><a href="#the-option-element" id="option-24">option</a></code> elements with a common label.<p>The element's group of <code><a href="#the-option-element" id="option-25">option</a></code> elements consists of
697: the <code><a href="#the-option-element" id="option-26">option</a></code> elements that are children of the
1.190 mike 698: <code><a href="#the-optgroup-element" id="optgroup-8">optgroup</a></code> element.<p>The <dfn id="attr-optgroup-disabled" title="attr-optgroup-disabled"><code>disabled</code></dfn> attribute
1.156 mike 699: is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-15">boolean attribute</a> and can be used to <a href="#concept-option-disabled" id="concept-option-disabled-2" title="concept-option-disabled">disable</a> a group of
1.191 mike 700: <code><a href="#the-option-element" id="option-27">option</a></code> elements together.<p>The <dfn id="attr-optgroup-label" title="attr-optgroup-label"><code>label</code></dfn>
1.9 mike 701: attribute must be specified. Its value gives the name of the group,
1.160 mike 702: for the purposes of the user interface. <div class="example">
1.9 mike 703:
704: <p>The following snippet shows how a set of lessons from three
1.234 mike 705: courses could be offered in a <code><a href="#the-select-element" id="select-33">select</a></code> drop-down
1.9 mike 706: widget:</p>
707:
708: <pre><form action="courseselector.dll" method="get">
709: <p>Which course would you like to watch today?
710: <p><label>Course:
711: <select name="c">
712: <optgroup label="8.01 Physics I: Classical Mechanics">
713: <option value="8.01.1">Lecture 01: Powers of Ten
714: <option value="8.01.2">Lecture 02: 1D Kinematics
715: <option value="8.01.3">Lecture 03: Vectors
716: <optgroup label="8.02 Electricity and Magnestism">
717: <option value="8.02.1">Lecture 01: What holds our world together?
718: <option value="8.02.2">Lecture 02: Electric Field
719: <option value="8.02.3">Lecture 03: Electric Flux
720: <optgroup label="8.03 Physics III: Vibrations and Waves">
721: <option value="8.03.1">Lecture 01: Periodic Phenomenon
722: <option value="8.03.2">Lecture 02: Beats
723: <option value="8.03.3">Lecture 03: Forced Oscillations with Damping
724: </select>
725: </label>
1.320 mike 726: <p><input type=submit value="▶ Play">
1.9 mike 727: </form></pre>
728:
1.202 mike 729: </div><h4 id="the-option-element"><span class="secno">4.10.12 </span>The <dfn><code>option</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.9 mike 730: <dd>None.</dd>
1.203 mike 731: <dt>Contexts in which this element can be used:</dt>
1.234 mike 732: <dd>As a child of a <code><a href="#the-select-element" id="select-34">select</a></code> element.</dd>
1.156 mike 733: <dd>As a child of a <code><a href="#the-datalist-element" id="datalist-17">datalist</a></code> element.</dd>
1.190 mike 734: <dd>As a child of an <code><a href="#the-optgroup-element" id="optgroup-9">optgroup</a></code> element.</dd>
1.9 mike 735: <dt>Content model:</dt>
1.366 mike 736: <dd><a href="content-models.html#text-content" id="text-content-5" title="text content">Text</a>.</dd>
1.9 mike 737: <dt>Content attributes:</dt>
1.321 mike 738: <dd><a href="elements.html#global-attributes" id="global-attributes-92">Global attributes</a></dd>
1.156 mike 739: <dd><code title="attr-option-disabled"><a href="#attr-option-disabled" id="disabled-6">disabled</a></code></dd>
1.304 mike 740: <dd><code title="attr-option-label"><a href="#attr-option-label" id="label-33">label</a></code></dd>
1.156 mike 741: <dd><code title="attr-option-selected"><a href="#attr-option-selected" id="selected-0">selected</a></code></dd>
1.255 mike 742: <dd><code title="attr-option-value"><a href="#attr-option-value" id="value-34">value</a></code></dd>
1.9 mike 743: <dt>DOM interface:</dt>
744: <dd>
1.162 mike 745: <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>(),
746: 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),
747: 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),
748: 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),
749: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-tvds" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected, in boolean selected)]
1.321 mike 750: interface <dfn id="htmloptionelement">HTMLOptionElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-103">HTMLElement</a> {
1.162 mike 751: 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>;
752: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-7">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
753: 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>;
754: 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>;
755: 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>;
756: 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 757:
1.162 mike 758: 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>;
759: 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 760: };</pre>
761: </dd>
1.191 mike 762: </dl><p>The <code><a href="#the-option-element" id="option-28">option</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> an option
1.234 mike 763: in a <code><a href="#the-select-element" id="select-35">select</a></code> element or as part of a list of suggestions
1.160 mike 764: in a <code><a href="#the-datalist-element" id="datalist-18">datalist</a></code> element.<p>In certain circumstances described in the definition of the
1.234 mike 765: <code><a href="#the-select-element" id="select-36">select</a></code> element, an <code><a href="#the-option-element" id="option-29">option</a></code> element can be a
766: <code><a href="#the-select-element" id="select-37">select</a></code> element's <a href="#placeholder-label-option" id="placeholder-label-option-0">placeholder label option</a>.
1.156 mike 767: A <a href="#placeholder-label-option" id="placeholder-label-option-1">placeholder label option</a> does not represent an actual
1.234 mike 768: option, but instead represents a label for the <code><a href="#the-select-element" id="select-38">select</a></code>
1.160 mike 769: control.<p>The <dfn id="attr-option-disabled" title="attr-option-disabled"><code>disabled</code></dfn>
1.156 mike 770: attribute is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-16">boolean attribute</a>. An
1.191 mike 771: <code><a href="#the-option-element" id="option-30">option</a></code> element is <dfn id="concept-option-disabled" title="concept-option-disabled">disabled</dfn> if its <code title="attr-option-disabled"><a href="#attr-option-disabled" id="disabled-7">disabled</a></code> attribute is present or
1.190 mike 772: if it is a child of an <code><a href="#the-optgroup-element" id="optgroup-10">optgroup</a></code> element whose <code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled" id="disabled-4">disabled</a></code> attribute is
1.160 mike 773: present.<p>The <dfn id="attr-option-label" title="attr-option-label"><code>label</code></dfn>
1.191 mike 774: attribute provides a label for element. The <dfn id="concept-option-label" title="concept-option-label">label</dfn> of an <code><a href="#the-option-element" id="option-31">option</a></code>
1.304 mike 775: element is the value of the <code title="attr-option-label"><a href="#attr-option-label" id="label-34">label</a></code> attribute, if there is one,
1.162 mike 776: or the <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> of the element, if there isn't.<p>The <dfn id="attr-option-value" title="attr-option-value"><code>value</code></dfn>
1.191 mike 777: attribute provides a value for element. The <dfn id="concept-option-value" title="concept-option-value">value</dfn> of an <code><a href="#the-option-element" id="option-32">option</a></code>
1.255 mike 778: element is the value of the <code title="attr-option-value"><a href="#attr-option-value" id="value-35">value</a></code> attribute, if there is one,
1.162 mike 779: or the <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> of the element, if there isn't.<p>The <dfn id="attr-option-selected" title="attr-option-selected"><code>selected</code></dfn>
1.298 mike 780: attribute is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-17">boolean attribute</a>. It represents the
781: default <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-option-selectedness" title='Read about this "selectedness" reference in the full HTML5 spec.'>selectedness</a> of the
1.366 mike 782: element.<p>A <code><a href="#the-select-element" id="select-39">select</a></code> element whose <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-39">multiple</a></code> attribute is not
1.191 mike 783: specified must not have more than one descendant <code><a href="#the-option-element" id="option-33">option</a></code>
1.156 mike 784: element with its <code title="attr-option-selected"><a href="#attr-option-selected" id="selected-1">selected</a></code>
1.162 mike 785: 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 786:
787: <dd>
788:
789: <p>Returns true if the element is selected, and false otherwise.</p>
790:
1.202 mike 791: <p>Can be set, to override the current state of the element.</p>
792:
1.9 mike 793: </dd>
794:
1.162 mike 795: <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 796:
797: <dd>
798:
1.234 mike 799: <p>Returns the index of the element in its <code><a href="#the-select-element" id="select-40">select</a></code>
1.162 mike 800: 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 801: list.</p>
802:
803: </dd>
804:
1.162 mike 805: <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 806:
807: <dd>
808:
1.262 mike 809: <p>Returns the element's <code><a href="forms.html#the-form-element" id="form-22">form</a></code> element, if any, or
1.9 mike 810: null otherwise.</p>
811:
812: </dd>
813:
1.162 mike 814: <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 815:
816: <dd>
817:
1.206 mike 818: <p>Same as <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code>, except that spaces are collapsed.</p>
1.11 mike 819:
820: </dd>
821:
1.162 mike 822: <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 823:
824: <dd>
825:
1.191 mike 826: <p>Returns a new <code><a href="#the-option-element" id="option-34">option</a></code> element.</p>
1.9 mike 827:
828: <p>The <var title="">text</var> argument sets the contents of the element.</p>
1.255 mike 829: <p>The <var title="">value</var> argument sets the <code title="attr-option-value"><a href="#attr-option-value" id="value-36">value</a></code> attribute.</p>
1.156 mike 830: <p>The <var title="">defaultSelected</var> argument sets the <code title="attr-option-selected"><a href="#attr-option-selected" id="selected-2">selected</a></code> attribute.</p>
1.9 mike 831: <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>
832:
833: </dd>
834:
1.202 mike 835: </dl><h4 id="the-textarea-element"><span class="secno">4.10.13 </span>The <dfn><code>textarea</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 836: <dd><a href="content-models.html#flow-content" id="flow-content-128">Flow content</a>.</dd>
1.363 mike 837: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-144">Phrasing content</a>.</dd>
1.156 mike 838: <dd><a href="content-models.html#interactive-content" id="interactive-content-17">Interactive content</a>.</dd>
1.202 mike 839: <dd><a href="forms.html#category-listed" id="category-listed-7" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-5" title="category-label">labelable</a>, <a href="forms.html#category-submit" id="category-submit-6" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" id="category-reset-3" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-11">form-associated element</a>.</dd>
1.203 mike 840: <dt>Contexts in which this element can be used:</dt>
1.363 mike 841: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-145">phrasing content</a> is expected.</dd>
1.9 mike 842: <dt>Content model:</dt>
1.366 mike 843: <dd><a href="content-models.html#text-content" id="text-content-6" title="text content">Text</a>.</dd>
1.9 mike 844: <dt>Content attributes:</dt>
1.321 mike 845: <dd><a href="elements.html#global-attributes" id="global-attributes-93">Global attributes</a></dd>
1.156 mike 846: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-5">autofocus</a></code></dd>
847: <dd><code title="attr-textarea-cols"><a href="#attr-textarea-cols" id="cols">cols</a></code></dd>
1.370 ! mike 848: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-17">disabled</a></code></dd>
1.323 mike 849: <dd><code title="attr-textarea-dirname"><a href="#attr-textarea-dirname" id="dirname-26">dirname</a></code></dd>
1.262 mike 850: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-53">form</a></code></dd>
1.156 mike 851: <dd><code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength" id="maxlength-27">maxlength</a></code></dd>
852: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-41">name</a></code></dd>
853: <dd><code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder" id="placeholder-28">placeholder</a></code></dd>
1.187 mike 854: <dd><code title="attr-textarea-readonly"><a href="#attr-textarea-readonly" id="readonly-41">readonly</a></code></dd>
1.234 mike 855: <dd><code title="attr-textarea-required"><a href="#attr-textarea-required" id="required-32">required</a></code></dd>
1.156 mike 856: <dd><code title="attr-textarea-rows"><a href="#attr-textarea-rows" id="rows">rows</a></code></dd>
857: <dd><code title="attr-textarea-wrap"><a href="#attr-textarea-wrap" id="wrap">wrap</a></code></dd>
1.9 mike 858: <dt>DOM interface:</dt>
859: <dd>
1.321 mike 860: <pre class="idl">interface <dfn id="htmltextareaelement">HTMLTextAreaElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-104">HTMLElement</a> {
1.162 mike 861: 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>;
862: 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>;
863: 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>;
1.323 mike 864: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/.html#dom-textarea-dirname" title='Read about this "dirName" reference in the full HTML5 spec.'>dirName</a>;
1.162 mike 865: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-8">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
866: 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>;
867: 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>;
868: 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>;
869: 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>;
870: 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>;
871: 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>;
872: 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>;
873:
874: 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>;
875: 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>;
876: 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>;
877: 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>;
878:
879: 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>;
880: 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>;
881: 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>;
882: 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>();
883: 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);
884:
885: 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>;
886:
887: 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>();
888: 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>;
889: 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>;
890: 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 891: };</pre>
892: </dd>
1.323 mike 893: </dl><p>The <code><a href="#the-textarea-element" id="textarea-23">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 894: multiline plain text edit control. The contents of the control represent the
1.370 ! mike 895: control's default value.<p class="note">A newline in a <code><a href="#the-textarea-element" id="textarea-24">textarea</a></code> element, and in
! 896: its <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-textarea-raw-value" title='Read about this "raw value" reference in the full HTML5 spec.'>raw value</a>,
! 897: separates paragraphs for the purposes of the Unicode bidirectional
! 898: algorithm. <a href="references.html#refsBIDI">[BIDI]</a><p>The <dfn id="attr-textarea-readonly" title="attr-textarea-readonly"><code>readonly</code></dfn> attribute
1.298 mike 899: is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-18">boolean attribute</a> used to control whether the text
1.160 mike 900: 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 901: attribute specifies the expected maximum number of characters per
1.156 mike 902: line. If the <code title="attr-textarea-cols"><a href="#attr-textarea-cols" id="cols-0">cols</a></code> attribute
903: is specified, its value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer" id="valid-non-negative-integer-11">valid non-negative
1.160 mike 904: integer</a> greater than zero. <p>The <dfn id="attr-textarea-rows" title="attr-textarea-rows"><code>rows</code></dfn>
1.156 mike 905: attribute specifies the number of lines to show. If the <code title="attr-textarea-rows"><a href="#attr-textarea-rows" id="rows-0">rows</a></code> attribute is specified, its
906: value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer" id="valid-non-negative-integer-12">valid non-negative integer</a> greater than
1.160 mike 907: zero. <p>The <dfn id="attr-textarea-wrap" title="attr-textarea-wrap"><code>wrap</code></dfn>
1.304 mike 908: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute" id="enumerated-attribute-10">enumerated attribute</a> with two keywords
1.9 mike 909: and states: the <dfn id="attr-textarea-wrap-soft" title="attr-textarea-wrap-soft"><code>soft</code></dfn> keyword
1.198 mike 910: which maps to the <a href="#attr-textarea-wrap-soft-state" id="attr-textarea-wrap-soft-state-0" title="attr-textarea-wrap-soft-state">Soft</a> state, and the
1.9 mike 911: <dfn id="attr-textarea-wrap-hard" title="attr-textarea-wrap-hard"><code>hard</code></dfn> keyword
1.198 mike 912: which maps to the <a href="#attr-textarea-wrap-hard-state" id="attr-textarea-wrap-hard-state-0" title="attr-textarea-wrap-hard-state">Hard</a> state. The
913: <i>missing value default</i> is the <a href="#attr-textarea-wrap-soft-state" id="attr-textarea-wrap-soft-state-1" title="attr-textarea-wrap-soft-state">Soft</a> state.<p>The <dfn id="attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</dfn> state
1.370 ! mike 914: indicates that the text in the <code><a href="#the-textarea-element" id="textarea-25">textarea</a></code> is not to be
1.198 mike 915: wrapped when it is submitted (though it can still be wrapped in the
916: rendering).<p>The <dfn id="attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</dfn> state
1.370 ! mike 917: indicates that the text in the <code><a href="#the-textarea-element" id="textarea-26">textarea</a></code> is to have
1.198 mike 918: newlines added by the user agent so that the text is wrapped when it
919: is submitted.<p>If the element's <code title="attr-textarea-wrap"><a href="#attr-textarea-wrap" id="wrap-0">wrap</a></code>
920: attribute is in the <a href="#attr-textarea-wrap-hard-state" id="attr-textarea-wrap-hard-state-1" title="attr-textarea-wrap-hard-state">Hard</a> state, the <code title="attr-textarea-cols"><a href="#attr-textarea-cols" id="cols-1">cols</a></code> attribute must be
1.9 mike 921: specified.</p><!-- attr-textarea-wrap-off (attr-textarea-wrap-off-state): not
922: conforming; turns off the rendering of wrapping but otherwise acts
923: like 'soft' --><p>The <dfn id="attr-textarea-maxlength" title="attr-textarea-maxlength"><code>maxlength</code></dfn>
1.156 mike 924: attribute is a <a href="association-of-controls-and-forms.html#attr-fe-maxlength" id="attr-fe-maxlength-1" title="attr-fe-maxlength">form control <code title="">maxlength</code> attribute</a> controlled by the
1.370 ! mike 925: <code><a href="#the-textarea-element" id="textarea-27">textarea</a></code> element's <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-textarea-dirty" title='Read about this "dirty value flag" reference in the full HTML5 spec.'>dirty value flag</a>.<p>If the <code><a href="#the-textarea-element" id="textarea-28">textarea</a></code> element has a <a href="association-of-controls-and-forms.html#maximum-allowed-value-length" id="maximum-allowed-value-length-2">maximum allowed
1.9 mike 926: value length</a>, then the element's children must be such that
1.162 mike 927: 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
928: <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> IDL attribute is equal to or less than the
1.160 mike 929: element's <a href="association-of-controls-and-forms.html#maximum-allowed-value-length" id="maximum-allowed-value-length-3">maximum allowed value length</a>.<p>The <dfn id="attr-textarea-required" title="attr-textarea-required"><code>required</code></dfn> attribute
1.298 mike 930: is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-19">boolean attribute</a>. When specified, the user will
1.9 mike 931: 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>
932: attribute represents a hint (a word or short phrase) intended to aid
933: the user with data entry. A hint could be a sample value or a brief
934: description of the expected format. The attribute, if specified,
935: must have a value that contains no U+000A LINE FEED (LF) or U+000D
1.160 mike 936: CARRIAGE RETURN (CR) characters.<p class="note">For a longer hint or other advisory text, the <code title="attr-title"><a href="elements.html#the-title-attribute" id="title-26">title</a></code> attribute is more appropriate.<p>The <code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder" id="placeholder-29">placeholder</a></code>
1.9 mike 937: attribute should not be used as an alternative to a
1.323 mike 938: <code><a href="forms.html#the-label-element" id="label-20">label</a></code>.<p>The <dfn id="attr-textarea-dirname" title="attr-textarea-dirname"><code>dirname</code></dfn>
939: attribute is a <a href="association-of-controls-and-forms.html#form-control-dirname-attribute" id="form-control-dirname-attribute-1">form control <code title="">dirname</code>
940: attribute</a>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-54">form</a></code> attribute is used to
1.370 ! mike 941: explicitly associate the <code><a href="#the-textarea-element" id="textarea-29">textarea</a></code> element with its
1.156 mike 942: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-10">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-42">name</a></code>
1.370 ! mike 943: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-18">disabled</a></code> attribute is used to make
1.9 mike 944: the control non-interactive and to prevent its value from being
1.156 mike 945: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-6">autofocus</a></code>
1.160 mike 946: attribute controls focus.<dl class="domintro"><dt><var title="">textarea</var> . <code title="attr-textarea-type">type</code></dt>
1.9 mike 947:
948: <dd>
949:
950: <p>Returns the string "<code title="">textarea</code>".</p>
951:
952: </dd>
953:
954: <dt><var title="">textarea</var> . <code title="attr-textarea-value">value</code></dt>
955:
956: <dd>
957:
958: <p>Returns the current value of the element.</p>
959:
960: <p>Can be set, to change the value.</p>
961:
962: </dd>
963:
964: </dl><div class="example">
965:
1.370 ! mike 966: <p>Here is an example of a <code><a href="#the-textarea-element" id="textarea-30">textarea</a></code> being used for
1.9 mike 967: unrestricted free-form text input in a form:</p>
968:
969: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments></textarea></p></pre>
970:
1.323 mike 971: <p>To specify that a maximum length for the comments, one can use
972: the <code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength" id="maxlength-28">maxlength</a></code>
973: attribute:</p>
974:
975: <pre><p>If you have any short comments, please let us know: <textarea cols=80 name=comments maxlength=200></textarea></p></pre>
976:
977: <p>To give a default value, text can be included inside the element:</p>
978:
979: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments>You rock!</textarea></p></pre>
980:
981: <p>To have the browser submit <a href="elements.html#the-directionality" id="the-directionality-9">the directionality</a> of
982: the element along with the value, the <code title="attr-textarea-dirname"><a href="#attr-textarea-dirname" id="dirname-27">dirname</a></code> attribute can be
983: specified:</p>
984:
985: <pre><p>If you have any comments, please let us know (you may use either English or Hebrew for your comments):
986: <textarea cols=80 name=comments dirname=comments.dir></textarea></p></pre>
987:
1.202 mike 988: </div><h4 id="the-keygen-element"><span class="secno">4.10.14 </span>The <dfn><code>keygen</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 989: <dd><a href="content-models.html#flow-content" id="flow-content-129">Flow content</a>.</dd>
1.363 mike 990: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-146">Phrasing content</a>.</dd>
1.156 mike 991: <dd><a href="content-models.html#interactive-content" id="interactive-content-18">Interactive content</a>.</dd>
1.202 mike 992: <dd><a href="forms.html#category-listed" id="category-listed-8" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-6" title="category-label">labelable</a>, <a href="forms.html#category-submit" id="category-submit-7" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" id="category-reset-4" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-12">form-associated element</a>.</dd>
1.203 mike 993: <dt>Contexts in which this element can be used:</dt>
1.363 mike 994: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-147">phrasing content</a> is expected.</dd>
1.9 mike 995: <dt>Content model:</dt>
996: <dd>Empty.</dd>
997: <dt>Content attributes:</dt>
1.321 mike 998: <dd><a href="elements.html#global-attributes" id="global-attributes-94">Global attributes</a></dd>
1.156 mike 999: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-7">autofocus</a></code></dd>
1000: <dd><code title="attr-keygen-challenge"><a href="#attr-keygen-challenge" id="challenge">challenge</a></code></dd>
1.370 ! mike 1001: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-19">disabled</a></code></dd>
1.262 mike 1002: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-55">form</a></code></dd>
1.156 mike 1003: <dd><code title="attr-keygen-keytype"><a href="#attr-keygen-keytype" id="keytype">keytype</a></code></dd>
1004: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-43">name</a></code></dd>
1.9 mike 1005: <dt>DOM interface:</dt>
1006: <dd>
1.321 mike 1007: <pre class="idl">interface <dfn id="htmlkeygenelement">HTMLKeygenElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-105">HTMLElement</a> {
1.162 mike 1008: 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>;
1009: 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>;
1010: 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>;
1011: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-9">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1012: 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>;
1013: 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>;
1014:
1015: 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>;
1016:
1017: 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>;
1018: 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>;
1019: 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>;
1020: 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>();
1021: 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 1022:
1.162 mike 1023: 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 1024: };</pre>
1025: </dd>
1.190 mike 1026: </dl><p>The <code><a href="#the-keygen-element" id="keygen-12">keygen</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a key
1.9 mike 1027: pair generator control. When the control's form is submitted, the
1028: private key is stored in the local keystore, and the public key is
1.160 mike 1029: 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 1030: may be specified. Its value will be packaged with the submitted
1.160 mike 1031: key.<p>The <dfn id="attr-keygen-keytype" title="attr-keygen-keytype"><code>keytype</code></dfn>
1.304 mike 1032: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute" id="enumerated-attribute-11">enumerated attribute</a>. The following
1.160 mike 1033: table lists the keywords and states for the attribute — the
1.9 mike 1034: keywords in the left column map to the states listed in the cell in
1035: the second column on the same row as the keyword. User agents are
1.26 mike 1036: not required to support these values, and must only recognize values
1.160 mike 1037: whose corresponding algorithms they support.<table><thead><tr><th> Keyword <th> State
1038: <tbody><tr><td> <code title="">rsa</code>
1039: <td> <i title="">RSA</i>
1.9 mike 1040: <!-- v2 (see below)
1041: <tr>
1042: <td> <code title="">ec</code>
1043: <td> <i title="">EC</i>
1044: -->
1.160 mike 1045: </table><p>The <i>invalid value default</i> state is the <i title="">unknown</i> state. The <i>missing value default</i> state
1046: 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
1047: user agents are to support — it is possible for a user agent
1.262 mike 1048: to not support any key types at all.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-56">form</a></code> attribute is used to
1.190 mike 1049: explicitly associate the <code><a href="#the-keygen-element" id="keygen-13">keygen</a></code> element with its
1.156 mike 1050: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-11">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-44">name</a></code>
1.370 ! mike 1051: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-20">disabled</a></code> attribute is used to make
1.9 mike 1052: the control non-interactive and to prevent its value from being
1.156 mike 1053: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-8">autofocus</a></code>
1.160 mike 1054: attribute controls focus.<dl class="domintro"><dt><var title="">keygen</var> . <code title="attr-keygen-type">type</code></dt>
1.9 mike 1055:
1056: <dd>
1057:
1058: <p>Returns the string "<code title="">keygen</code>".</p>
1059:
1060: </dd>
1061:
1062: </dl><p class="note">This specification does not specify how the private
1063: key generated is to be used. It is expected that after receiving the
1.162 mike 1064: <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 1065: server will generate a client certificate and offer it back to the
1066: user for download; this certificate, once downloaded and stored in
1067: the key store along with the private key, can then be used to
1.88 mike 1068: authenticate to services that use TLS and certificate
1.9 mike 1069: authentication.</p><!-- how does the UA know which private key is associated with a
1070: certificate it gets back after the server has taken the public key
1071: created by <keygen> and turned it into a client cert? --><div class="example">
1072:
1073: <p>To generate a key pair, add the private key to the user's key
1074: store, and submit the public key to the server, markup such as the
1075: following can be used:</p>
1076:
1.22 mike 1077: <pre><form action="processkey.cgi" method="post" enctype="multipart/form-data">
1.9 mike 1078: <p><keygen name="key"></p>
1079: <p><input type=submit value="Submit key..."></p>
1080: </form></pre>
1081:
1082: <p>The server will then receive a form submission with a packaged
1083: RSA public key as the value of "<code title="">key</code>". This
1084: can then be used for various purposes, such as generating a client
1085: certificate, as mentioned above.</p>
1086:
1.202 mike 1087: </div><h4 id="the-output-element"><span class="secno">4.10.15 </span>The <dfn><code>output</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.321 mike 1088: <dd><a href="content-models.html#flow-content" id="flow-content-130">Flow content</a>.</dd>
1.363 mike 1089: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-148">Phrasing content</a>.</dd>
1.202 mike 1090: <dd><a href="forms.html#category-listed" id="category-listed-9" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-7" title="category-label">labelable</a>, and <a href="forms.html#category-reset" id="category-reset-5" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-13">form-associated element</a>.</dd>
1.203 mike 1091: <dt>Contexts in which this element can be used:</dt>
1.363 mike 1092: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-149">phrasing content</a> is expected.</dd>
1.9 mike 1093: <dt>Content model:</dt>
1.363 mike 1094: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-150">Phrasing content</a>.</dd>
1.9 mike 1095: <dt>Content attributes:</dt>
1.321 mike 1096: <dd><a href="elements.html#global-attributes" id="global-attributes-95">Global attributes</a></dd>
1.156 mike 1097: <dd><code title="attr-output-for"><a href="#attr-output-for" id="for-2">for</a></code></dd>
1.262 mike 1098: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-57">form</a></code></dd>
1.156 mike 1099: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-45">name</a></code></dd>
1.9 mike 1100: <dt>DOM interface:</dt>
1101: <dd>
1.321 mike 1102: <pre class="idl">interface <dfn id="htmloutputelement">HTMLOutputElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-106">HTMLElement</a> {
1103: [PutForwards=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/common-dom-interfaces.html#dom-domsettabletokenlist-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>] readonly attribute <a href="urls.html#domsettabletokenlist" id="domsettabletokenlist-7">DOMSettableTokenList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-htmlfor" title='Read about this "htmlFor" reference in the full HTML5 spec.'>htmlFor</a>;
1.162 mike 1104: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-10">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1105: 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>;
1106:
1107: 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>;
1108: 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>;
1109: 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>;
1110:
1111: 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>;
1112: 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>;
1113: 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>;
1114: 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>();
1115: 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 1116:
1.162 mike 1117: 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 1118: };</pre>
1119: </dd>
1.162 mike 1120: </dl><p>The <code><a href="#the-output-element" id="output-11">output</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> the result of a
1.160 mike 1121: calculation.<p>The <dfn id="attr-output-for" title="attr-output-for"><code>for</code></dfn> content
1.9 mike 1122: attribute allows an explicit relationship to be made between the
1123: result of a calculation and the elements that represent the values
1124: that went into the calculation or that otherwise influenced the
1.156 mike 1125: calculation. The <code title="attr-output-for"><a href="#attr-output-for" id="for-3">for</a></code> attribute,
1.306 mike 1126: if specified, must contain a string consisting of an <a href="common-microsyntaxes.html#unordered-set-of-unique-space-separated-tokens" id="unordered-set-of-unique-space-separated-tokens-3">unordered
1.265 mike 1127: set of unique space-separated tokens</a> that are
1128: <a href="infrastructure.html#case-sensitive" id="case-sensitive-5">case-sensitive</a>, each of which must have the value of an
1129: <a href="elements.html#concept-id" id="concept-id-19" title="concept-id">ID</a> of an element in the same
1.262 mike 1130: <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#document" title='Read about this "Document" reference in the full HTML5 spec.'>Document</a></code>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-58">form</a></code> attribute is used to
1.156 mike 1131: explicitly associate the <code><a href="#the-output-element" id="output-12">output</a></code> element with its
1132: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-12">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-46">name</a></code>
1.162 mike 1133: 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 1134:
1135: <dd>
1136:
1137: <p>Returns the element's current value.</p>
1138:
1139: <p>Can be set, to change the value.</p>
1140:
1141: </dd>
1142:
1.162 mike 1143: <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 1144:
1145: <dd>
1146:
1147: <p>Returns the element's current default value.</p>
1148:
1149: <p>Can be set, to change the default value.</p>
1150:
1151: </dd>
1152:
1.162 mike 1153: <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 1154:
1155: <dd>
1156:
1157: <p>Returns the string "<code title="">output</code>".</p>
1158:
1159: </dd>
1160:
1161: </dl><div class="example">
1162:
1.156 mike 1163: <p>A simple calculator could use <code><a href="#the-output-element" id="output-13">output</a></code> for its
1.9 mike 1164: display of calculated results:</p>
1165:
1166: <pre><form onsubmit="return false">
1167: <input name=a type=number step=any> +
1168: <input name=b type=number step=any> =
1.32 mike 1169: <output onforminput="value = a.valueAsNumber + b.valueAsNumber"></output>
1.9 mike 1170: </form></pre>
1171:
1.202 mike 1172: </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"><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>
1.321 mike 1173: <dd><a href="content-models.html#flow-content" id="flow-content-131">Flow content</a>.</dd>
1.363 mike 1174: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-151">Phrasing content</a>.</dd>
1.202 mike 1175: <dd><a href="forms.html#category-label" id="category-label-8" title="category-label">Labelable</a> <a href="forms.html#form-associated-element" id="form-associated-element-14">form-associated element</a>.</dd>
1.203 mike 1176: <dt>Contexts in which this element can be used:</dt>
1.363 mike 1177: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-152">phrasing content</a> is expected.</dd>
1.11 mike 1178: <dt>Content model:</dt>
1.363 mike 1179: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-153">Phrasing content</a>, but there must be no <code><a href="#the-progress-element" id="progress-8">progress</a></code> element descendants.</dd>
1.11 mike 1180: <dt>Content attributes:</dt>
1.321 mike 1181: <dd><a href="elements.html#global-attributes" id="global-attributes-96">Global attributes</a></dd>
1.255 mike 1182: <dd><code title="attr-progress-value"><a href="#attr-progress-value" id="value-38">value</a></code></dd>
1.156 mike 1183: <dd><code title="attr-progress-max"><a href="#attr-progress-max" id="max-36">max</a></code></dd>
1.262 mike 1184: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-59">form</a></code></dd>
1.11 mike 1185: <dt>DOM interface:</dt>
1186: <dd>
1.321 mike 1187: <pre class="idl">interface <dfn id="htmlprogresselement">HTMLProgressElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-107">HTMLElement</a> {
1.197 mike 1188: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1189: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-max" title='Read about this "max" reference in the full HTML5 spec.'>max</a>;
1190: readonly attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-position" title='Read about this "position" reference in the full HTML5 spec.'>position</a>;
1.162 mike 1191: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-11">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1192: 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 1193: };</pre>
1194: </dd>
1.162 mike 1195: </dl><p>The <code><a href="#the-progress-element" id="progress-9">progress</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> the
1.11 mike 1196: completion progress of a task. The progress is either indeterminate,
1197: indicating that progress is being made but that it is not clear how
1.278 mike 1198: much more work remains to be done before the task is complete (e.g.
1199: because the task is waiting for a remote host to respond), or the
1200: progress is a number in the range zero to a maximum, giving the
1.160 mike 1201: fraction of work that has so far been completed.<p>There are two attributes that determine the current task
1.278 mike 1202: completion represented by the element. The <dfn id="attr-progress-value" title="attr-progress-value"><code>value</code></dfn> attribute
1203: specifies how much of the task has been completed, and the <dfn id="attr-progress-max" title="attr-progress-max"><code>max</code></dfn> attribute specifies
1204: how much work the task requires in total. The units are arbitrary
1205: and not specified.<p>Authors are encouraged to also include the current value and the
1.11 mike 1206: maximum value inline as text inside the element, so that the
1.160 mike 1207: progress is made available to users of legacy user agents.<div class="example">
1.11 mike 1208: <p>Here is a snippet of a Web application that shows the progress
1209: of some automated task:</p>
1210: <pre><section>
1211: <h2>Task Progress</h2>
1212: <p>Progress: <progress id="p" max=100><span>0</span>%</progress></p>
1213: <script>
1214: var progressBar = document.getElementById('p');
1215: function updateProgress(newValue) {
1216: progressBar.value = newValue;
1217: progressBar.getElementsByTagName('span')[0].textContent = newValue;
1218: }
1219: </script>
1220: </section></pre>
1221: <p>(The <code>updateProgress()</code> method in this example would
1222: be called by some other code on the page to update the actual
1223: progress bar as the task progressed.)</p>
1.255 mike 1224: </div><p>The <code title="attr-progress-value"><a href="#attr-progress-value" id="value-39">value</a></code> and <code title="attr-progress-max"><a href="#attr-progress-max" id="max-37">max</a></code> attributes, when present, must
1.156 mike 1225: have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" id="valid-floating-point-number-9" title="valid floating point number">valid
1.255 mike 1226: floating point numbers</a>. The <code title="attr-progress-value"><a href="#attr-progress-value" id="value-40">value</a></code> attribute, if present, must
1.11 mike 1227: have a value equal to or greater than zero, and less than or equal
1.156 mike 1228: to the value of the <code title="attr-progress-max"><a href="#attr-progress-max" id="max-38">max</a></code>
1229: attribute, if present, or 1.0, otherwise. The <code title="attr-progress-max"><a href="#attr-progress-max" id="max-39">max</a></code> attribute, if present, must
1.160 mike 1230: have a value greater than zero.<p class="note">The <code><a href="#the-progress-element" id="progress-10">progress</a></code> element is the wrong
1.11 mike 1231: element to use for something that is just a gauge, as opposed to
1232: task progress. For instance, indicating disk space usage using
1.156 mike 1233: <code><a href="#the-progress-element" id="progress-11">progress</a></code> would be inappropriate. Instead, the
1.190 mike 1234: <code><a href="#the-meter-element" id="meter-8">meter</a></code> element is available for such use cases.<dl class="domintro"><dt><var title="">progress</var> . <code title="dom-progress-position"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-position" title='Read about this "position" reference in the full HTML5 spec.'>position</a></code></dt>
1.11 mike 1235:
1236: <dd>
1237:
1238: <p>For a determinate progress bar (one with known current and
1239: maximum values), returns the result of dividing the current value
1240: by the maximum value.</p>
1241:
1.160 mike 1242: <p>For an indeterminate progress bar, returns −1.</p>
1.11 mike 1243:
1.278 mike 1244: </dd>
1245:
1.351 mike 1246: </dl><h4 id="the-meter-element"><span class="secno">4.10.17 </span>The <dfn><code>meter</code></dfn> element</h4><!-- Keep this after <progress> and NOT close to <time> --><dl class="element"><dt>Categories</dt>
1.321 mike 1247: <dd><a href="content-models.html#flow-content" id="flow-content-132">Flow content</a>.</dd>
1.363 mike 1248: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-154">Phrasing content</a>.</dd>
1.202 mike 1249: <dd><a href="forms.html#category-label" id="category-label-9" title="category-label">Labelable</a> <a href="forms.html#form-associated-element" id="form-associated-element-15">form-associated element</a>.</dd>
1.203 mike 1250: <dt>Contexts in which this element can be used:</dt>
1.363 mike 1251: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-155">phrasing content</a> is expected.</dd>
1.11 mike 1252: <dt>Content model:</dt>
1.363 mike 1253: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-156">Phrasing content</a>, but there must be no <code><a href="#the-meter-element" id="meter-9">meter</a></code> element descendants.</dd>
1.11 mike 1254: <dt>Content attributes:</dt>
1.321 mike 1255: <dd><a href="elements.html#global-attributes" id="global-attributes-97">Global attributes</a></dd>
1.255 mike 1256: <dd><code title="attr-meter-value"><a href="#attr-meter-value" id="value-42">value</a></code></dd>
1.156 mike 1257: <dd><code title="attr-meter-min"><a href="#attr-meter-min" id="min-38">min</a></code></dd>
1258: <dd><code title="attr-meter-max"><a href="#attr-meter-max" id="max-41">max</a></code></dd>
1259: <dd><code title="attr-meter-low"><a href="#attr-meter-low" id="low">low</a></code></dd>
1260: <dd><code title="attr-meter-high"><a href="#attr-meter-high" id="high">high</a></code></dd>
1261: <dd><code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum">optimum</a></code></dd>
1.262 mike 1262: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-60">form</a></code></dd>
1.11 mike 1263: <dt>DOM interface:</dt>
1264: <dd>
1.321 mike 1265: <pre class="idl">interface <dfn id="htmlmeterelement">HTMLMeterElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-108">HTMLElement</a> {
1.197 mike 1266: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1267: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-min" title='Read about this "min" reference in the full HTML5 spec.'>min</a>;
1268: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-max" title='Read about this "max" reference in the full HTML5 spec.'>max</a>;
1269: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-low" title='Read about this "low" reference in the full HTML5 spec.'>low</a>;
1270: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-high" title='Read about this "high" reference in the full HTML5 spec.'>high</a>;
1271: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-optimum" title='Read about this "optimum" reference in the full HTML5 spec.'>optimum</a>;
1.162 mike 1272: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-12">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1273: 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 1274: };</pre>
1275: </dd>
1.190 mike 1276: </dl><p>The <code><a href="#the-meter-element" id="meter-10">meter</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a scalar
1.11 mike 1277: measurement within a known range, or a fractional value; for example
1278: disk usage, the relevance of a query result, or the fraction of a
1.190 mike 1279: voting population to have selected a particular candidate.<p>This is also known as a gauge.<p class="note">The <code><a href="#the-meter-element" id="meter-11">meter</a></code> element should not be used to
1.11 mike 1280: indicate progress (as in a progress bar). For that role, HTML
1.190 mike 1281: provides a separate <code><a href="#the-progress-element" id="progress-12">progress</a></code> element.<p class="note">The <code><a href="#the-meter-element" id="meter-12">meter</a></code> element also does not
1.160 mike 1282: represent a scalar value of arbitrary range — for example, it
1.11 mike 1283: would be wrong to use this to report a weight, or height, unless
1.160 mike 1284: there is a known maximum value.<p>There are six attributes that determine the semantics of the
1285: gauge represented by the element.<p>The <dfn id="attr-meter-min" title="attr-meter-min"><code>min</code></dfn> attribute
1.11 mike 1286: specifies the lower bound of the range, and the <dfn id="attr-meter-max" title="attr-meter-max"><code>max</code></dfn> attribute specifies
1287: the upper bound. The <dfn id="attr-meter-value" title="attr-meter-value"><code>value</code></dfn> attribute
1288: specifies the value to have the gauge indicate as the "measured"
1.160 mike 1289: value.<p>The other three attributes can be used to segment the gauge's
1.11 mike 1290: range into "low", "medium", and "high" parts, and to indicate which
1291: part of the gauge is the "optimum" part. The <dfn id="attr-meter-low" title="attr-meter-low"><code>low</code></dfn> attribute specifies
1292: 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
1293: 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
1294: gives the position that is "optimum"; if that is higher than the
1295: "high" value then this indicates that the higher the value, the
1296: better; if it's lower than the "low" mark then it indicates that
1297: lower values are better, and naturally if it is in between then it
1.255 mike 1298: indicates that neither high nor low values are good.<p> The <code title="attr-meter-value"><a href="#attr-meter-value" id="value-43">value</a></code> attribute must be
1299: specified. The <code title="attr-meter-value"><a href="#attr-meter-value" id="value-44">value</a></code>, <code title="attr-meter-min"><a href="#attr-meter-min" id="min-39">min</a></code>, <code title="attr-meter-low"><a href="#attr-meter-low" id="low-0">low</a></code>, <code title="attr-meter-high"><a href="#attr-meter-high" id="high-0">high</a></code>, <code title="attr-meter-max"><a href="#attr-meter-max" id="max-42">max</a></code>, and <code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum-0">optimum</a></code> attributes, when present,
1.156 mike 1300: must have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" id="valid-floating-point-number-10" title="valid floating point
1.255 mike 1301: number">valid floating point numbers</a>.<p>In addition, the attributes' values are further constrained:<p>Let <var title="">value</var> be the <code title="attr-meter-value"><a href="#attr-meter-value" id="value-45">value</a></code> attribute's number.<p>If the <code title="attr-meter-min"><a href="#attr-meter-min" id="min-40">min</a></code> attribute
1.11 mike 1302: attribute is specified, then let <var title="">minimum</var> be that
1.160 mike 1303: attribute's value; otherwise, let it be zero.<p>If the <code title="attr-meter-max"><a href="#attr-meter-max" id="max-43">max</a></code> attribute
1.11 mike 1304: attribute is specified, then let <var title="">maximum</var> be that
1.160 mike 1305: 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>
1306: <li><var title="">minimum</var> ≤ <code title="attr-meter-low"><a href="#attr-meter-low" id="low-1">low</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-low"><a href="#attr-meter-low" id="low-2">low</a></code> is specified)</li>
1307: <li><var title="">minimum</var> ≤ <code title="attr-meter-high"><a href="#attr-meter-high" id="high-1">high</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-high"><a href="#attr-meter-high" id="high-2">high</a></code> is specified)</li>
1308: <li><var title="">minimum</var> ≤ <code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum-1">optimum</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum-2">optimum</a></code> is specified)</li>
1309: <li><code title="attr-meter-low"><a href="#attr-meter-low" id="low-3">low</a></code> ≤ <code title="attr-meter-high"><a href="#attr-meter-high" id="high-3">high</a></code> (if both <code title="attr-meter-low"><a href="#attr-meter-low" id="low-4">low</a></code> and <code title="attr-meter-high"><a href="#attr-meter-high" id="high-4">high</a></code> are specified)</li>
1.21 mike 1310: </ul><p class="note">If no minimum or maximum is specified, then the
1.11 mike 1311: range is assumed to be 0..1, and the value thus has to be within
1.160 mike 1312: that range.<p>Authors are encouraged to include a textual representation of the
1.11 mike 1313: gauge's state in the element's contents, for users of user agents
1.190 mike 1314: that do not support the <code><a href="#the-meter-element" id="meter-13">meter</a></code> element.<div class="example">
1.11 mike 1315:
1316: <p>The following examples show three gauges that would all be
1317: three-quarters full:</p>
1318:
1319: <pre>Storage space usage: <meter value=6 max=8>6 blocks used (out of 8 total)</meter>
1320: Voter turnout: <meter value=0.75><img alt="75%" src="graph75.png"></meter>
1321: Tickets sold: <meter min="0" max="100" value="75"></meter></pre>
1322:
1323: <p>The following example is incorrect use of the element, because
1324: it doesn't give a range (and since the default maximum is 1, both
1325: of the gauges would end up looking maxed out):</p>
1326:
1327: <pre class="bad"><p>The grapefruit pie had a radius of <meter value=12>12cm</meter>
1328: and a height of <meter value=2>2cm</meter>.</p> <!-- <strong>BAD!</strong> --></pre>
1329:
1330: <p>Instead, one would either not include the meter element, or use
1331: the meter element with a defined range to give the dimensions in
1332: context compared to other pies:</p>
1333:
1334: <pre><p>The grapefruit pie had a radius of 12cm and a height of
1335: 2cm.</p>
1336: <dl>
1337: <dt>Radius: <dd> <meter min=0 max=20 value=12>12cm</meter>
1338: <dt>Height: <dd> <meter min=0 max=10 value=2>2cm</meter>
1339: </dl></pre>
1340:
1341: </div><p>There is no explicit way to specify units in the
1.190 mike 1342: <code><a href="#the-meter-element" id="meter-14">meter</a></code> element, but the units may be specified in the
1.160 mike 1343: <code title="attr-title"><a href="elements.html#the-title-attribute" id="title-27">title</a></code> attribute in free-form text.<div class="example">
1.11 mike 1344:
1345: <p>The example above could be extended to mention the units:</p>
1346:
1347: <pre><dl>
1348: <dt>Radius: <dd> <meter min=0 max=20 value=12 title="centimeters">12cm</meter>
1349: <dt>Height: <dd> <meter min=0 max=10 value=2 title="centimeters">2cm</meter>
1350: </dl></pre>
1351:
1352: </div><div class="example">
1353: <p>The following markup:</p>
1354: <pre><h3>Suggested groups</h3>
1355: <menu type="toolbar">
1356: <a href="?cmd=hsg" onclick="hideSuggestedGroups()">Hide suggested groups</a>
1357: </menu>
1358: <ul>
1359: <li>
1360: <p><a href="/group/comp.infosystems.www.authoring.stylesheets/view">comp.infosystems.www.authoring.stylesheets</a> -
1361: <a href="/group/comp.infosystems.www.authoring.stylesheets/subscribe">join</a></p>
1362: <p>Group description: <strong>Layout/presentation on the WWW.</strong></p>
1363: <p><strong><meter value="0.5">Moderate activity,</meter></strong> Usenet, 618 subscribers</p>
1364: </li>
1365: <li>
1366: <p><a href="/group/netscape.public.mozilla.xpinstall/view">netscape.public.mozilla.xpinstall</a> -
1367: <a href="/group/netscape.public.mozilla.xpinstall/subscribe">join</a></p>
1368: <p>Group description: <strong>Mozilla XPInstall discussion.</strong></p>
1369: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 22 subscribers</p>
1370: </li>
1371: <li>
1372: <p><a href="/group/mozilla.dev.general/view">mozilla.dev.general</a> -
1373: <a href="/group/mozilla.dev.general/subscribe">join</a></p>
1374: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 66 subscribers</p>
1375: </li>
1376: </ul></pre>
1377: <p>Might be rendered as follows:</p>
1.203 mike 1378: <p><img alt="With the <meter> elements rendered as inline green bars of varying lengths." height="178" src="http://dev.w3.org/html5/spec/images/sample-meter.png" width="332"></p>
1.13 mike 1379: </div><p>User agents combine the value of
1.156 mike 1380: the <code title="attr-title"><a href="elements.html#the-title-attribute" id="title-28">title</a></code> attribute and the other
1.11 mike 1381: attributes to provide context-sensitive help or inline text
1.160 mike 1382: detailing the actual values.<div class="example">
1.11 mike 1383: <p>For example, the following snippet:</p>
1384: <pre><meter min=0 max=60 value=23.2 title=seconds></meter></pre>
1385: <p>...might cause the user agent to display a gauge with a tooltip
1386: saying "Value: 23.2 out of 60." on one line and "seconds" on a
1387: second line.</p>
1.262 mike 1388: </div><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-61">form</a></code> attribute is used to
1.190 mike 1389: explicitly associate the <code><a href="#the-meter-element" id="meter-15">meter</a></code> element with its
1.160 mike 1390: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-13">form owner</a>.<div class="example">
1.11 mike 1391:
1392: <p>The following example shows how a gauge could fall back to
1393: localized or pretty-printed text.</p>
1394:
1.160 mike 1395: <pre><p>Disk usage: <meter min=0 value=170261928 max=233257824>170 261 928 bytes used
1396: out of 233 257 824 bytes available</meter></p></pre>
1.11 mike 1397:
1.160 mike 1398: </div>
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