Annotation of html5/spec-author-view/the-button-element.html, revision 1.9
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1.5 mike 3: <!-- when publishing, change bits marked ZZZ --><html lang="en-US-x-Hixie" class="split chapter"><head><title>4.10.6 The button element — HTML5 (Author Edition)</title><script src="link-fixup.js"></script><link href="whatwg.css" rel="stylesheet"><style type="text/css">
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1.9 ! mike 216: .apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
! 217: .apple-table-examples.e2 th[scope=row] { padding-left: 1em; }
! 218: .apple-table-examples sup { line-height: 0; }
! 219:
! 220: </style><link href="data:text/css," rel="stylesheet" title="Complete specification"><link href="data:text/css,.impl%20%7B%20display:%20none;%20%7D" rel="alternate stylesheet" title="Author documentation only"><link href="data:text/css,.impl%20%7B%20background:%20%23FFEEEE;%20%7D" rel="alternate stylesheet" title="Highlight implementation requirements"><link href="data:text/css," id="complete" rel="stylesheet" title="Complete specification"><link href="data:text/css,.impl%20%7B%20display:%20none;%20%7D" id="author" rel="alternate stylesheet" title="Author documentation only"><link href="data:text/css,.impl%20%7B%20background:%20%23FFEEEE;%20%7D" id="highlight" rel="alternate stylesheet" title="Highlight implementation requirements"><script>
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! 238: function load(script) {
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! 241: document.body.appendChild(e);
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! 243: function init() {
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! 249: // load('reviewer.js'); // would need cross-site XHR
! 250: if (document.getElementById('head'))
! 251: load('toc.js');
! 252:
! 253: // load('updater.js'); // would need cross-site XHR
! 254: load('dfn.js');
! 255: // load('status.js'); // would need cross-site XHR
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! 260: </script><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><link href="common-input-element-attributes.html" title="4.10.5.2 Common input element attributes" rel="prev">
! 261: <link href="Overview.html#contents" title="Table of contents" rel="index">
! 262: <link href="association-of-controls-and-forms.html" title="4.10.14 Association of controls and forms" rel="next">
! 263: </head><body onload="fixBrokenLink(); init()"><div class="head" id="head">
! 264: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
! 265: <h1>HTML5 (Author Edition)</h1>
! 266: </div><div>
! 267: <a href="common-input-element-attributes.html">← 4.10.5.2 Common input element attributes</a> –
! 268: <a href="Overview.html#contents">Table of contents</a> –
! 269: <a href="association-of-controls-and-forms.html">4.10.14 Association of controls and forms →</a>
! 270: <ol class="toc"><li><ol><li><ol><li><a href="the-button-element.html#the-button-element"><span class="secno">4.10.6 </span>The <code>button</code> element</a></li><li><a href="the-button-element.html#the-select-element"><span class="secno">4.10.7 </span>The <code>select</code> element</a></li><li><a href="the-button-element.html#the-datalist-element"><span class="secno">4.10.8 </span>The <code>datalist</code> element</a></li><li><a href="the-button-element.html#the-optgroup-element"><span class="secno">4.10.9 </span>The <code>optgroup</code> element</a></li><li><a href="the-button-element.html#the-option-element"><span class="secno">4.10.10 </span>The <code>option</code> element</a></li><li><a href="the-button-element.html#the-textarea-element"><span class="secno">4.10.11 </span>The <code>textarea</code> element</a></li><li><a href="the-button-element.html#the-keygen-element"><span class="secno">4.10.12 </span>The <code>keygen</code> element</a></li><li><a href="the-button-element.html#the-output-element"><span class="secno">4.10.13 </span>The <code>output</code> element</a></li></ol></li></ol></li></ol></div>
! 271:
! 272: <h4 id="the-button-element"><span class="secno">4.10.6 </span>The <dfn><code>button</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
! 273: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
! 274: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
! 275: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
! 276: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</a>, and <a href="forms.html#category-submit" title="category-submit">submittable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
! 277: <dt>Contexts in which this element may be used:</dt>
! 278: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
! 279: <dt>Content model:</dt>
! 280: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>, but there must be no <a href="content-models.html#interactive-content">interactive content</a> descendant.</dd>
! 281: <dt>Content attributes:</dt>
! 282: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
! 283: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
! 284: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
! 285: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
! 286: <dd><code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code></dd>
! 287: <dd><code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code></dd>
! 288: <dd><code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code></dd>
! 289: <dd><code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code></dd>
! 290: <dd><code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code></dd>
! 291: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
! 292: <dd><code title="attr-button-type"><a href="#attr-button-type">type</a></code></dd>
! 293: <dd><code title="attr-button-value"><a href="#attr-button-value">value</a></code></dd>
! 294: <dt>DOM interface:</dt>
! 295: <dd>
! 296: <pre class="idl">interface <dfn id="htmlbuttonelement">HTMLButtonElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
! 297: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
! 298: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
! 299: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
! 300: attribute DOMString <a href="#dom-fs-formaction" title="dom-fs-formAction">formAction</a>;
! 301: attribute DOMString <a href="#dom-fs-formenctype" title="dom-fs-formEnctype">formEnctype</a>;
! 302: attribute DOMString <a href="#dom-fs-formmethod" title="dom-fs-formMethod">formMethod</a>;
! 303: attribute DOMString <a href="#dom-fs-formnovalidate" title="dom-fs-formNoValidate">formNoValidate</a>;
! 304: attribute DOMString <a href="#dom-fs-formtarget" title="dom-fs-formTarget">formTarget</a>;
! 305: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
! 306: attribute DOMString <a href="#dom-button-type" title="dom-button-type">type</a>;
! 307: attribute DOMString <a href="#dom-button-value" title="dom-button-value">value</a>;
! 308:
! 309: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
! 310: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
! 311: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
! 312: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
! 313: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
! 314:
! 315: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
! 316: };</pre>
! 317: </dd>
! 318: </dl><p>The <code><a href="#the-button-element">button</a></code> element <a href="#represents">represents</a> a
! 319: button. </p><p>The element is a <a href="forms.html#concept-button" title="concept-button">button</a>.</p><p>The <dfn id="attr-button-type" title="attr-button-type"><code>type</code></dfn>
! 320: attribute controls the behavior of the button when it is activated.
! 321: It is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following table
! 322: lists the keywords and states for the attribute — the keywords
! 323: in the left column map to the states in the cell in the second
! 324: column on the same row as the keyword.</p><table><thead><tr><th> Keyword
! 325: </th><th> State
! 326: </th><th> Brief description
! 327: </th></tr></thead><tbody><tr><td><dfn id="attr-button-type-submit" title="attr-button-type-submit"><code>submit</code></dfn>
! 328: </td><td><a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
! 329: </td><td>Submits the form.
! 330: </td></tr><tr><td><dfn id="attr-button-type-reset" title="attr-button-type-reset"><code>reset</code></dfn>
! 331: </td><td><a href="#attr-button-type-reset-state" title="attr-button-type-reset-state">Reset Button</a>
! 332: </td><td>Resets the form.
! 333: </td></tr><tr><td><dfn id="attr-button-type-button" title="attr-button-type-button"><code>button</code></dfn>
! 334: </td><td><a href="#attr-button-type-button-state" title="attr-button-type-button-state">Button</a>
! 335: </td><td>Does nothing.
! 336: </td></tr></tbody></table><p>The <i>missing value default</i> is the <a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
! 337: state.</p><p>If the <code title="attr-button-type"><a href="#attr-button-type">type</a></code> attribute is in
! 338: the <a href="#attr-button-type-submit-state" title="attr-button-type-submit-state">Submit Button</a>
! 339: state, the element is specifically a <a href="forms.html#concept-submit-button" title="concept-submit-button">submit button</a>.</p><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
! 340: explicitly associate the <code><a href="#the-button-element">button</a></code> element with its
! 341: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
! 342: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
! 343: the control non-interactive and to prevent its value from being
! 344: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
! 345: attribute controls focus. The <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction">formaction</a></code>, <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype">formenctype</a></code>, <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod">formmethod</a></code>, <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code>, and <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget">formtarget</a></code> attributes are
! 346: <a href="association-of-controls-and-forms.html#attributes-for-form-submission">attributes for form submission</a>.</p><p class="note">The <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate">formnovalidate</a></code> attribute can
! 347: be used to make submit buttons that do not trigger the constraint
! 348: validation.</p><p>The <dfn id="attr-button-value" title="attr-button-value"><code>value</code></dfn>
! 349: attribute gives the element's value for the purposes of form
! 350: submission. The <code title="attr-button-value"><a href="#attr-button-value">value</a></code>
! 351: attribute must not be present unless the <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is present. The
! 352: element's <a href="#concept-fe-value" title="concept-fe-value">value</a> is the value
! 353: of the element's <code title="attr-button-value"><a href="#attr-button-value">value</a></code>
! 354: attribute, if there is one, or the empty string otherwise.</p><p class="note">A button (and its value) is only included in the
! 355: form submission if the button itself was used to initiate the form
! 356: submission.</p><div class="example">
! 357:
! 358: <p>The following button is labeled "Show hint" and pops up a dialog
! 359: box when activated:</p>
! 360:
! 361: <pre><button type=button
! 362: onclick="alert('This 15-20 minute piece was composed by George Gershwin.')">
! 363: Show hint
! 364: </button></pre>
! 365:
! 366: </div><h4 id="the-select-element"><span class="secno">4.10.7 </span>The <dfn><code>select</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
! 367: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
! 368: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
! 369: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
! 370: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</a>, <a href="forms.html#category-submit" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" title="category-reset">resettable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
! 371: <dt>Contexts in which this element may be used:</dt>
! 372: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
! 373: <dt>Content model:</dt>
! 374: <dd>Zero or more <code><a href="#the-option-element">option</a></code> or <code><a href="#the-optgroup-element">optgroup</a></code> elements.</dd>
! 375: <dt>Content attributes:</dt>
! 376: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
! 377: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
! 378: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
! 379: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
! 380: <dd><code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code></dd>
! 381: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
! 382: <dd><code title="attr-select-size"><a href="#attr-select-size">size</a></code></dd>
! 383: <dt>DOM interface:</dt>
! 384: <dd>
! 385: <pre class="idl">interface <dfn id="htmlselectelement">HTMLSelectElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
! 386: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
! 387: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
! 388: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
! 389: attribute boolean <a href="#dom-select-multiple" title="dom-select-multiple">multiple</a>;
! 390: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
! 391: attribute unsigned long <a href="#dom-select-size" title="dom-select-size">size</a>;
! 392:
! 393: readonly attribute DOMString <a href="#dom-select-type" title="dom-select-type">type</a>;
! 394:
! 395: readonly attribute <a href="urls.html#htmloptionscollection">HTMLOptionsCollection</a> <a href="#dom-select-options" title="dom-select-options">options</a>;
! 396: attribute unsigned long <a href="#dom-select-length" title="dom-select-length">length</a>;
! 397: caller getter any <a href="#dom-select-item" title="dom-select-item">item</a>(in unsigned long index);
! 398: caller getter any <a href="#dom-select-nameditem" title="dom-select-namedItem">namedItem</a>(in DOMString name);
! 399: void <a href="#dom-select-add" title="dom-select-add">add</a>(in <a href="elements.html#htmlelement">HTMLElement</a> element, in optional <a href="elements.html#htmlelement">HTMLElement</a> before);
! 400: void <a href="#dom-select-add" title="dom-select-add">add</a>(in <a href="elements.html#htmlelement">HTMLElement</a> element, in long before);
! 401: void <a href="#dom-select-remove" title="dom-select-remove">remove</a>(in long index);
! 402:
! 403: readonly attribute <a href="urls.html#htmlcollection">HTMLCollection</a> <a href="#dom-select-selectedoptions" title="dom-select-selectedOptions">selectedOptions</a>;
! 404: attribute long <a href="#dom-select-selectedindex" title="dom-select-selectedIndex">selectedIndex</a>;
! 405: attribute DOMString <a href="#dom-select-value" title="dom-select-value">value</a>;
! 406:
! 407: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
! 408: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
! 409: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
! 410: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
! 411: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
! 412:
! 413: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
! 414: };</pre>
! 415: </dd>
! 416: </dl><!-- Proposals for v2:
! 417: * <select value=""> as an alternative to <option selected>
! 418: http://developers.slashdot.org/comments.pl?sid=426306&cid=22142072
! 419: <Philip`> http://www.ipiao.com.cn/ does <select size="1" name="to"><script>City_Default="PEK"</script><SCRIPT language=javascript
! 420: src="/js/flightcity.js"></SCRIPT></select> which is the kind of thing that could be much simpler with <select value="PEK">
! 421: * a way to make the <select> not have a default value at all (ack
! 422: or to have a "placeholer" like value that doesn't count as a value being selected but shows a prompt until a value is selected
! 423: * once we can have no default, a way to require="" a value.
! 424: ack Weston Ruter: http://weston.ruter.net/projects/test-cases/html-select-element/
! 425: q.v. http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2008-November/017583.html
! 426: --><p>The <code><a href="#the-select-element">select</a></code> element represents a control for
! 427: selecting amongst a set of options.</p><p>The <dfn id="attr-select-multiple" title="attr-select-multiple"><code>multiple</code></dfn>
! 428: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. If the attribute is
! 429: present, then the <code><a href="#the-select-element">select</a></code> element
! 430: <a href="#represents">represents</a> a control for selecting zero or more options
! 431: from the <a href="#concept-select-option-list" title="concept-select-option-list">list of
! 432: options</a>. If the attribute is absent, then the
! 433: <code><a href="#the-select-element">select</a></code> element <a href="#represents">represents</a> a control for
! 434: selecting a single option from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p><p>The <dfn id="concept-select-option-list" title="concept-select-option-list">list of options</dfn>
! 435: for a <code><a href="#the-select-element">select</a></code> element consists of all the
! 436: <code><a href="#the-option-element">option</a></code> element children of the <code><a href="#the-select-element">select</a></code>
! 437: element, and all the <code><a href="#the-option-element">option</a></code> element children of all the
! 438: <code><a href="#the-optgroup-element">optgroup</a></code> element children of the <code><a href="#the-select-element">select</a></code>
! 439: element, in <a href="infrastructure.html#tree-order">tree order</a>.</p><p>The <dfn id="attr-select-size" title="attr-select-size"><code>size</code></dfn>
! 440: attribute gives the number of options to show to the user. The <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute, if specified, must
! 441: have a value that is a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a>
! 442: greater than zero. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is present,
! 443: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
! 444: default value is 4. If the <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code> attribute is absent,
! 445: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size">size</a></code> attribute's
! 446: default value is 1.</p><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
! 447: explicitly associate the <code><a href="#the-select-element">select</a></code> element with its
! 448: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
! 449: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
! 450: the control non-interactive and to prevent its value from being
! 451: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
! 452: attribute controls focus.</p><dl class="domintro"><dt><var title="">select</var> . <code title="dom-select-type"><a href="#dom-select-type">type</a></code></dt>
! 453:
! 454: <dd>
! 455:
! 456: <p>Returns "<code title="">select-multiple</code>" if the element
! 457: has a <code title="attr-select-multiple"><a href="#attr-select-multiple">multiple</a></code>
! 458: attribute, and "<code title="">select-one</code>"
! 459: otherwise.</p>
! 460:
! 461: </dd>
! 462:
! 463: <dt><var title="">select</var> . <code title="dom-select-options"><a href="#dom-select-options">options</a></code></dt>
! 464:
! 465: <dd>
! 466:
! 467: <p>Returns an <code><a href="urls.html#htmloptionscollection">HTMLOptionsCollection</a></code> of the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
! 468:
! 469: </dd>
! 470:
! 471: <dt><var title="">select</var> . <code title="dom-select-length"><a href="#dom-select-length">length</a></code> [ = <var title="">value</var> ]</dt>
! 472: <dd>
! 473: <p>Returns the number of elements in the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
! 474: <p>When set to a smaller number, truncates the number of <code><a href="#the-option-element">option</a></code> elements in the <code><a href="#the-select-element">select</a></code>.</p>
! 475: <p>When set to a greater number, adds new blank <code><a href="#the-option-element">option</a></code> elements to the <code><a href="#the-select-element">select</a></code>.</p>
! 476: </dd>
! 477:
! 478: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a href="#dom-select-item">item</a></code>(<var title="">index</var>)</dt>
! 479: <dt><var title="">select</var>[<var title="">index</var>]</dt>
! 480: <dt><var title="">select</var>(<var title="">index</var>)</dt>
! 481: <dd>
! 482: <p>Returns the item with index <var title="">index</var> from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>. The items are sorted in <a href="infrastructure.html#tree-order">tree order</a>.</p>
! 483: <p>Returns null if <var title="">index</var> is out of range.</p>
! 484: </dd>
! 485:
! 486: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a href="#dom-select-item">namedItem</a></code>(<var title="">name</var>)</dt>
! 487: <dt><var title="">select</var>[<var title="">name</var>]</dt>
! 488: <dt><var title="">select</var>(<var title="">name</var>)</dt>
! 489: <dd>
! 490: <p>Returns the item with ID or <code title="attr-option-name">name</code> <var title="">name</var> from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>.</p>
! 491: <p>If there are multiple matching items, then a <code>NodeList</code> object containing all those elements is returned.</p>
! 492: <p>Returns null if no element with that ID could be found.</p>
! 493: </dd>
! 494:
! 495: <dt><var title="">select</var> . <code title="dom-select-add"><a href="#dom-select-add">add</a></code>(<var title="">element</var> [, <var title="">before</var> ])</dt>
! 496: <dd>
! 497: <p>Inserts <var title="">element</var> before the node given by <var title="">before</var>.</p>
! 498: <p>The <var title="">before</var> argument can be a number, in
! 499: which case <var title="">element</var> is inserted before the item
! 500: with that number, or an element from the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a>, in
! 501: which case <var title="">element</var> is inserted before that
! 502: element.</p>
! 503: <p>If <var title="">before</var> is omitted, null, or a number out
! 504: of range, then <var title="">element</var> will be added at the
! 505: end of the list.</p>
! 506: <p>This method will throw a <code><a href="urls.html#hierarchy_request_err">HIERARCHY_REQUEST_ERR</a></code>
! 507: exception if <var title="">element</var> is an ancestor of the
! 508: element into which it is to be inserted. If <var title="">element</var> is not an <code><a href="#the-option-element">option</a></code> or
! 509: <code><a href="#the-optgroup-element">optgroup</a></code> element, then the method does nothing.</p>
! 510: </dd>
! 511:
! 512: <dt><var title="">select</var> . <code title="dom-select-selectedOptions"><a href="#dom-select-selectedoptions">selectedOptions</a></code></dt>
! 513:
! 514: <dd>
! 515:
! 516: <p>Returns an <code><a href="urls.html#htmlcollection">HTMLCollection</a></code> of the <a href="#concept-select-option-list" title="concept-select-option-list">list of options</a> that are
! 517: selected.</p>
! 518:
! 519: </dd>
! 520:
! 521: <dt><var title="">select</var> . <code title="dom-select-selectedIndex"><a href="#dom-select-selectedindex">selectedIndex</a></code> [ = <var title="">value</var> ]</dt>
! 522:
! 523: <dd>
! 524:
! 525: <p>Returns the index of the first selected item, if any, or
! 526: −1 if there is no selected item.</p>
! 527:
! 528: <p>Can be set, to change the selection.</p>
! 529:
! 530: </dd>
! 531:
! 532: <dt><var title="">select</var> . <code title="dom-select-value"><a href="#dom-select-value">value</a></code> [ = <var title="">value</var> ]</dt>
! 533:
! 534: <dd>
! 535:
! 536: <p>Returns the <a href="#concept-fe-value" title="concept-fe-value">value</a> of the
! 537: first selected item, if any, or the empty string if there is no
! 538: selected item.</p>
! 539:
! 540: <p>Can be set, to change the selection.</p>
! 541:
! 542: </dd>
! 543:
! 544: </dl><div class="example">
! 545:
! 546: <p>The following example shows how a <code><a href="#the-select-element">select</a></code> element
! 547: can be used to offer the user with a set of options from which the
! 548: user can select a single option. The default option is
! 549: preselected.</p>
! 550:
! 551: <pre><p>
! 552: <label for="unittype">Select unit type:</label>
! 553: <select id="unittype" name="unittype">
! 554: <option value="1"> Miner </option>
! 555: <option value="2"> Puffer </option>
! 556: <option value="3" selected> Snipey </option>
! 557: <option value="4"> Max </option>
! 558: <option value="5"> Firebot </option>
! 559: </select>
! 560: </p></pre>
! 561:
! 562: </div><div class="example">
! 563:
! 564: <p>Here, the user is offered a set of options from which he can
! 565: select any number. By default, all five options are selected.</p>
! 566:
! 567: <pre><p>
! 568: <label for="allowedunits">Select unit types to enable on this map:</label>
! 569: <select id="allowedunits" name="allowedunits" multiple>
! 570: <option value="1" selected> Miner </option>
! 571: <option value="2" selected> Puffer </option>
! 572: <option value="3" selected> Snipey </option>
! 573: <option value="4" selected> Max </option>
! 574: <option value="5" selected> Firebot </option>
! 575: </select>
! 576: </p></pre>
! 577:
! 578: </div><h4 id="the-datalist-element"><span class="secno">4.10.8 </span>The <dfn><code>datalist</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
! 579: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
! 580: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
! 581: <dt>Contexts in which this element may be used:</dt>
! 582: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
! 583: <dt>Content model:</dt>
! 584: <dd>Either: <a href="content-models.html#phrasing-content">phrasing content</a>.</dd>
! 585: <dd>Or: Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
! 586: <dt>Content attributes:</dt>
! 587: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
! 588: <dt>DOM interface:</dt>
! 589: <dd>
! 590: <pre class="idl">interface <dfn id="htmldatalistelement">HTMLDataListElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
! 591: readonly attribute <a href="urls.html#htmlcollection">HTMLCollection</a> <a href="#dom-datalist-options" title="dom-datalist-options">options</a>;
! 592: };</pre>
! 593: </dd>
! 594: </dl><p>The <code><a href="#the-datalist-element">datalist</a></code> element represents a set of
! 595: <code><a href="#the-option-element">option</a></code> elements that represent predefined options for
! 596: other controls. The contents of the element represents fallback
! 597: content for legacy user agents, intermixed with <code><a href="#the-option-element">option</a></code>
! 598: elements that represent the predefined options. In the rendering,
! 599: the <code><a href="#the-datalist-element">datalist</a></code> element <a href="#represents">represents</a>
! 600: nothing.</p><p>The <code><a href="#the-datalist-element">datalist</a></code> element is hooked up to an
! 601: <code><a href="the-input-element.html#the-input-element">input</a></code> element using the <code title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list">list</a></code> attribute on the
! 602: <code><a href="the-input-element.html#the-input-element">input</a></code> element. <!-- v2DATAGRID The
! 603: <code>datalist</code> element can also be used with a
! 604: <code>datagrid</code> element, as the source of autocompletion hints
! 605: for <code title="datagrid-type-editable">editable</code>
! 606: cells. --></p><p>Each <code><a href="#the-option-element">option</a></code> element that is a descendant of the
! 607: <code><a href="#the-datalist-element">datalist</a></code> element, that is not <a href="#concept-option-disabled" title="concept-option-disabled">disabled</a>, and whose <a href="#concept-option-value" title="concept-option-value">value</a> is a string that isn't the
! 608: empty string, represents a suggestion. Each suggestion has a <a href="#concept-option-value" title="concept-option-value">value</a> and a <a href="#concept-option-label" title="concept-option-label">label</a>.
! 609:
! 610: </p><dl class="domintro"><dt><var title="">datalist</var> . <code title="dom-datalist-options"><a href="#dom-datalist-options">options</a></code></dt>
! 611:
! 612: <dd>
! 613: <p>Returns an <code><a href="urls.html#htmlcollection">HTMLCollection</a></code> of the <code>options</code> elements of the table.</p>
! 614: </dd>
! 615:
! 616: </dl><h4 id="the-optgroup-element"><span class="secno">4.10.9 </span>The <dfn><code>optgroup</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
! 617: <dd>None.</dd>
! 618: <dt>Contexts in which this element may be used:</dt>
! 619: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
! 620: <dt>Content model:</dt>
! 621: <dd>Zero or more <code><a href="#the-option-element">option</a></code> elements.</dd>
! 622: <dt>Content attributes:</dt>
! 623: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
! 624: <dd><code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled">disabled</a></code></dd>
! 625: <dd><code title="attr-optgroup-label"><a href="#attr-optgroup-label">label</a></code></dd>
! 626: <dt>DOM interface:</dt>
! 627: <dd>
! 628: <pre class="idl">interface <dfn id="htmloptgroupelement">HTMLOptGroupElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
! 629: attribute boolean <a href="#dom-optgroup-disabled" title="dom-optgroup-disabled">disabled</a>;
! 630: attribute DOMString <a href="#dom-optgroup-label" title="dom-optgroup-label">label</a>;
! 631: };</pre>
! 632: </dd>
! 633: </dl><!-- v2: make optgroups selectable if they have a value. --><p>The <code><a href="#the-optgroup-element">optgroup</a></code> element <a href="#represents">represents</a> a group of
! 634: <code><a href="#the-option-element">option</a></code> elements with a common label.</p><p>The element's group of <code><a href="#the-option-element">option</a></code> elements consists of
! 635: the <code><a href="#the-option-element">option</a></code> elements that are children of the
! 636: <code><a href="#the-optgroup-element">optgroup</a></code> element.</p><p>The <dfn id="attr-optgroup-disabled" title="attr-optgroup-disabled"><code>disabled</code></dfn> attribute
! 637: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a> and can be used to <a href="#concept-option-disabled" title="concept-option-disabled">disable</a> a group of
! 638: <code><a href="#the-option-element">option</a></code> elements together.</p><p>The <dfn id="attr-optgroup-label" title="attr-optgroup-label"><code>label</code></dfn>
! 639: attribute must be specified. Its value gives the name of the group,
! 640: for the purposes of the user interface. </p><div class="example">
! 641:
! 642: <p>The following snippet shows how a set of lessons from three
! 643: courses could be offered in a <code><a href="#the-select-element">select</a></code> drop-down
! 644: widget:</p>
! 645:
! 646: <pre><form action="courseselector.dll" method="get">
! 647: <p>Which course would you like to watch today?
! 648: <p><label>Course:
! 649: <select name="c">
! 650: <optgroup label="8.01 Physics I: Classical Mechanics">
! 651: <option value="8.01.1">Lecture 01: Powers of Ten
! 652: <option value="8.01.2">Lecture 02: 1D Kinematics
! 653: <option value="8.01.3">Lecture 03: Vectors
! 654: <optgroup label="8.02 Electricity and Magnestism">
! 655: <option value="8.02.1">Lecture 01: What holds our world together?
! 656: <option value="8.02.2">Lecture 02: Electric Field
! 657: <option value="8.02.3">Lecture 03: Electric Flux
! 658: <optgroup label="8.03 Physics III: Vibrations and Waves">
! 659: <option value="8.03.1">Lecture 01: Periodic Phenomenon
! 660: <option value="8.03.2">Lecture 02: Beats
! 661: <option value="8.03.3">Lecture 03: Forced Oscillations with Damping
! 662: </select>
! 663: </label>
! 664: <p><input type=submit value="▶ Play">
! 665: </form></pre>
! 666:
! 667: </div><h4 id="the-option-element"><span class="secno">4.10.10 </span>The <dfn><code>option</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
! 668: <dd>None.</dd>
! 669: <dt>Contexts in which this element may be used:</dt>
! 670: <dd>As a child of a <code><a href="#the-select-element">select</a></code> element.</dd>
! 671: <dd>As a child of a <code><a href="#the-datalist-element">datalist</a></code> element.</dd>
! 672: <dd>As a child of an <code><a href="#the-optgroup-element">optgroup</a></code> element.</dd>
! 673: <dt>Content model:</dt>
! 674: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
! 675: <dt>Content attributes:</dt>
! 676: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
! 677: <dd><code title="attr-option-disabled"><a href="#attr-option-disabled">disabled</a></code></dd>
! 678: <dd><code title="attr-option-label"><a href="#attr-option-label">label</a></code></dd>
! 679: <dd><code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code></dd>
! 680: <dd><code title="attr-option-value"><a href="#attr-option-value">value</a></code></dd>
! 681: <dt>DOM interface:</dt>
! 682: <dd>
! 683: <pre class="idl">[NamedConstructor=<a href="#dom-option" title="dom-option">Option</a>(),
! 684: NamedConstructor=<a href="#dom-option-t" title="dom-option-t">Option</a>(in DOMString text),
! 685: NamedConstructor=<a href="#dom-option-tv" title="dom-option-tv">Option</a>(in DOMString text, in DOMString value),
! 686: NamedConstructor=<a href="#dom-option-tvd" title="dom-option-tvd">Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected),
! 687: NamedConstructor=<a href="#dom-option-tvds" title="dom-option-tvds">Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected, in boolean selected)]
! 688: interface <dfn id="htmloptionelement">HTMLOptionElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
! 689: attribute boolean <a href="#dom-option-disabled" title="dom-option-disabled">disabled</a>;
! 690: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-option-form" title="dom-option-form">form</a>;
! 691: attribute DOMString <a href="#dom-option-label" title="dom-option-label">label</a>;
! 692: attribute boolean <a href="#dom-option-defaultselected" title="dom-option-defaultSelected">defaultSelected</a>;
! 693: attribute boolean <a href="#dom-option-selected" title="dom-option-selected">selected</a>;
! 694: attribute DOMString <a href="#dom-option-value" title="dom-option-value">value</a>;
! 695:
! 696: attribute DOMString <a href="#dom-option-text" title="dom-option-text">text</a>;
! 697: readonly attribute long <a href="#dom-option-index" title="dom-option-index">index</a>;
! 698: };</pre>
! 699: </dd>
! 700: </dl><p>The <code><a href="#the-option-element">option</a></code> element <a href="#represents">represents</a> an option
! 701: in a <code><a href="#the-select-element">select</a></code> element or as part of a list of suggestions
! 702: in a <code><a href="#the-datalist-element">datalist</a></code> element.</p><p>The <dfn id="attr-option-disabled" title="attr-option-disabled"><code>disabled</code></dfn>
! 703: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. An
! 704: <code><a href="#the-option-element">option</a></code> element is <dfn id="concept-option-disabled" title="concept-option-disabled">disabled</dfn> if its <code title="attr-option-disabled"><a href="#attr-option-disabled">disabled</a></code> attribute is present or
! 705: if it is a child of an <code><a href="#the-optgroup-element">optgroup</a></code> element whose <code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled">disabled</a></code> attribute is
! 706: present.</p><p>The <dfn id="attr-option-label" title="attr-option-label"><code>label</code></dfn>
! 707: attribute provides a label for element. The <dfn id="concept-option-label" title="concept-option-label">label</dfn> of an <code><a href="#the-option-element">option</a></code>
! 708: element is the value of the <code title="attr-option-label"><a href="#attr-option-label">label</a></code> attribute, if there is one,
! 709: or the <code>textContent</code> of the element, if there isn't.</p><p>The <dfn id="attr-option-value" title="attr-option-value"><code>value</code></dfn>
! 710: attribute provides a value for element. The <dfn id="concept-option-value" title="concept-option-value">value</dfn> of an <code><a href="#the-option-element">option</a></code>
! 711: element is the value of the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute, if there is one,
! 712: or the <code>textContent</code> of the element, if there isn't.</p><p>The <dfn id="attr-option-selected" title="attr-option-selected"><code>selected</code></dfn>
! 713: attribute represents the default <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of the
! 714: element.</p><dl class="domintro"><dt><var title="">option</var> . <code title="dom-option-selected"><a href="#dom-option-selected">selected</a></code></dt>
! 715:
! 716: <dd>
! 717:
! 718: <p>Returns true if the element is selected, and false otherwise.</p>
! 719:
! 720: </dd>
! 721:
! 722: <dt><var title="">option</var> . <code title="dom-option-index"><a href="#dom-option-index">index</a></code></dt>
! 723:
! 724: <dd>
! 725:
! 726: <p>Returns the index of the element in its <code><a href="#the-select-element">select</a></code>
! 727: element's <code title="dom-select-options"><a href="#dom-select-options">options</a></code>
! 728: list.</p>
! 729:
! 730: </dd>
! 731:
! 732: <dt><var title="">option</var> . <code title="dom-option-form"><a href="#dom-option-form">form</a></code></dt>
! 733:
! 734: <dd>
! 735:
! 736: <p>Returns the element's <code><a href="forms.html#the-form-element">form</a></code> element, if any, or
! 737: null otherwise.</p>
! 738:
! 739: </dd>
! 740:
! 741: <dt><var title="">option</var> = new <code title="dom-option"><a href="#dom-option">Option</a></code>( [ <var title="">text</var> [, <var title="">value</var> [, <var title="">defaultSelected</var> [, <var title="">selected</var> ] ] ] ] )</dt>
! 742:
! 743: <dd>
! 744:
! 745: <p>Returns a new <code><a href="#the-option-element">option</a></code> element.</p>
! 746:
! 747: <p>The <var title="">text</var> argument sets the contents of the element.</p>
! 748: <p>The <var title="">value</var> argument sets the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute.</p>
! 749: <p>The <var title="">defaultSelected</var> argument sets the <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute.</p>
! 750: <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>
! 751:
! 752: </dd>
! 753:
! 754: </dl><h4 id="the-textarea-element"><span class="secno">4.10.11 </span>The <dfn><code>textarea</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
! 755: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
! 756: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
! 757: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
! 758: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</a>, <a href="forms.html#category-submit" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" title="category-reset">resettable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
! 759: <dt>Contexts in which this element may be used:</dt>
! 760: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
! 761: <dt>Content model:</dt>
! 762: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
! 763: <dt>Content attributes:</dt>
! 764: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
! 765: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
! 766: <dd><code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code></dd>
! 767: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
! 768: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
! 769: <dd><code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength">maxlength</a></code></dd>
! 770: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
! 771: <dd><code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code></dd>
! 772: <dd><code title="attr-textarea-readonly"><a href="#attr-textarea-readonly">readonly</a></code></dd>
! 773: <dd><code title="attr-textarea-required"><a href="#attr-textarea-required">required</a></code></dd>
! 774: <dd><code title="attr-textarea-rows"><a href="#attr-textarea-rows">rows</a></code></dd>
! 775: <dd><code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code></dd>
! 776: <dt>DOM interface:</dt>
! 777: <dd>
! 778: <pre class="idl">interface <dfn id="htmltextareaelement">HTMLTextAreaElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
! 779: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
! 780: attribute unsigned long <a href="#dom-textarea-cols" title="dom-textarea-cols">cols</a>;
! 781: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
! 782: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
! 783: attribute long <a href="#dom-textarea-maxlength" title="dom-textarea-maxLength">maxLength</a>;
! 784: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
! 785: attribute DOMString <a href="#dom-textarea-placeholder" title="dom-textarea-placeholder">placeholder</a>;
! 786: attribute boolean <a href="#dom-textarea-readonly" title="dom-textarea-readOnly">readOnly</a>;
! 787: attribute boolean <a href="#dom-textarea-required" title="dom-textarea-required">required</a>;
! 788: attribute unsigned long <a href="#dom-textarea-rows" title="dom-textarea-rows">rows</a>;
! 789: attribute DOMString <a href="#dom-textarea-wrap" title="dom-textarea-wrap">wrap</a>;
! 790:
! 791: readonly attribute DOMString <a href="#dom-textarea-type" title="dom-textarea-type">type</a>;
! 792: attribute DOMString <a href="#dom-textarea-defaultvalue" title="dom-textarea-defaultValue">defaultValue</a>;
! 793: attribute DOMString <a href="#dom-textarea-value" title="dom-textarea-value">value</a>;
! 794: readonly attribute unsigned long <a href="#dom-textarea-textlength" title="dom-textarea-textLength">textLength</a>;
! 795:
! 796: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
! 797: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
! 798: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
! 799: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
! 800: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
! 801:
! 802: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
! 803:
! 804: void <a href="#dom-textarea-input-select" title="dom-textarea/input-select">select</a>();
! 805: attribute unsigned long <a href="#dom-textarea-input-selectionstart" title="dom-textarea/input-selectionStart">selectionStart</a>;
! 806: attribute unsigned long <a href="#dom-textarea-input-selectionend" title="dom-textarea/input-selectionEnd">selectionEnd</a>;
! 807: void <a href="#dom-textarea-input-setselectionrange" title="dom-textarea/input-setSelectionRange">setSelectionRange</a>(in unsigned long start, in unsigned long end);
! 808: };</pre>
! 809: </dd>
! 810: </dl><p>The <code><a href="#the-textarea-element">textarea</a></code> element <a href="#represents">represents</a> a
! 811: multiline plain text edit control. The contents of the control represent the
! 812: control's default value.</p><p>The <dfn id="attr-textarea-readonly" title="attr-textarea-readonly"><code>readonly</code></dfn> attribute
! 813: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a> used to control whether the text
! 814: can be edited by the user or not.</p><p>The <dfn id="attr-textarea-cols" title="attr-textarea-cols"><code>cols</code></dfn>
! 815: attribute specifies the expected maximum number of characters per
! 816: line. If the <code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code> attribute
! 817: is specified, its value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative
! 818: integer</a> greater than zero. </p><p>The <dfn id="attr-textarea-rows" title="attr-textarea-rows"><code>rows</code></dfn>
! 819: attribute specifies the number of lines to show. If the <code title="attr-textarea-rows"><a href="#attr-textarea-rows">rows</a></code> attribute is specified, its
! 820: value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer">valid non-negative integer</a> greater than
! 821: zero. </p><p>The <dfn id="attr-textarea-wrap" title="attr-textarea-wrap"><code>wrap</code></dfn>
! 822: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a> with two keywords
! 823: and states: the <dfn id="attr-textarea-wrap-soft" title="attr-textarea-wrap-soft"><code>soft</code></dfn> keyword
! 824: which maps to the <dfn id="attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</dfn> state, and the
! 825: <dfn id="attr-textarea-wrap-hard" title="attr-textarea-wrap-hard"><code>hard</code></dfn> keyword
! 826: which maps to the <dfn id="attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</dfn> state. The
! 827: <i>missing value default</i> is the <a href="#attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</a> state.</p><p>If the element's <code title="attr-textarea-wrap"><a href="#attr-textarea-wrap">wrap</a></code>
! 828: attribute is in the <a href="#attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</a> state, the <code title="attr-textarea-cols"><a href="#attr-textarea-cols">cols</a></code> attribute must be
! 829: specified.</p><!-- attr-textarea-wrap-off (attr-textarea-wrap-off-state): not
! 830: conforming; turns off the rendering of wrapping but otherwise acts
! 831: like 'soft' --><p>The <dfn id="attr-textarea-maxlength" title="attr-textarea-maxlength"><code>maxlength</code></dfn>
! 832: attribute is a <a href="association-of-controls-and-forms.html#attr-fe-maxlength" title="attr-fe-maxlength">form control <code title="">maxlength</code> attribute</a> controlled by the
! 833: <code><a href="#the-textarea-element">textarea</a></code> element's <a href="#concept-textarea-dirty" title="concept-textarea-dirty">dirty value flag</a>.</p><p>If the <code><a href="#the-textarea-element">textarea</a></code> element has a <a href="association-of-controls-and-forms.html#maximum-allowed-value-length">maximum allowed
! 834: value length</a>, then the element's children must be such that
! 835: the <a href="#code-point-length">code-point length</a> of the value of the element's
! 836: <code>textContent</code> IDL attribute is equal to or less than the
! 837: element's <a href="association-of-controls-and-forms.html#maximum-allowed-value-length">maximum allowed value length</a>.</p><p>The <dfn id="attr-textarea-required" title="attr-textarea-required"><code>required</code></dfn> attribute
! 838: is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. When specified, the user will
! 839: 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>
! 840: attribute represents a hint (a word or short phrase) intended to aid
! 841: the user with data entry. A hint could be a sample value or a brief
! 842: description of the expected format. The attribute, if specified,
! 843: must have a value that contains no U+000A LINE FEED (LF) or U+000D
! 844: CARRIAGE RETURN (CR) characters.</p><p class="note">For a longer hint or other advisory text, the <code title="attr-title"><a href="elements.html#the-title-attribute">title</a></code> attribute is more appropriate.</p><p>The <code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder">placeholder</a></code>
! 845: attribute should not be used as an alternative to a
! 846: <code><a href="forms.html#the-label-element">label</a></code>.</p><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
! 847: explicitly associate the <code><a href="#the-textarea-element">textarea</a></code> element with its
! 848: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
! 849: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
! 850: the control non-interactive and to prevent its value from being
! 851: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
! 852: attribute controls focus.</p><dl class="domintro"><dt><var title="">textarea</var> . <code title="attr-textarea-type">type</code></dt>
! 853:
! 854: <dd>
! 855:
! 856: <p>Returns the string "<code title="">textarea</code>".</p>
! 857:
! 858: </dd>
! 859:
! 860: <dt><var title="">textarea</var> . <code title="attr-textarea-value">value</code></dt>
! 861:
! 862: <dd>
! 863:
! 864: <p>Returns the current value of the element.</p>
! 865:
! 866: <p>Can be set, to change the value.</p>
! 867:
! 868: </dd>
! 869:
! 870: </dl><div class="example">
! 871:
! 872: <p>Here is an example of a <code><a href="#the-textarea-element">textarea</a></code> being used for
! 873: unrestricted free-form text input in a form:</p>
! 874:
! 875: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments></textarea></p></pre>
! 876:
! 877: </div><h4 id="the-keygen-element"><span class="secno">4.10.12 </span>The <dfn><code>keygen</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
! 878: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
! 879: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
! 880: <dd><a href="content-models.html#interactive-content">Interactive content</a>.</dd>
! 881: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-label" title="category-label">labelable</a>, <a href="forms.html#category-submit" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" title="category-reset">resettable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
! 882: <dt>Contexts in which this element may be used:</dt>
! 883: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
! 884: <dt>Content model:</dt>
! 885: <dd>Empty.</dd>
! 886: <dt>Content attributes:</dt>
! 887: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
! 888: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code></dd>
! 889: <dd><code title="attr-keygen-challenge"><a href="#attr-keygen-challenge">challenge</a></code></dd>
! 890: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code></dd>
! 891: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
! 892: <dd><code title="attr-keygen-keytype"><a href="#attr-keygen-keytype">keytype</a></code></dd>
! 893: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
! 894: <dt>DOM interface:</dt>
! 895: <dd>
! 896: <pre class="idl">interface <dfn id="htmlkeygenelement">HTMLKeygenElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
! 897: attribute boolean <a href="#dom-fe-autofocus" title="dom-fe-autofocus">autofocus</a>;
! 898: attribute DOMString <a href="#dom-keygen-challenge" title="dom-keygen-challenge">challenge</a>;
! 899: attribute boolean <a href="#dom-fe-disabled" title="dom-fe-disabled">disabled</a>;
! 900: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
! 901: attribute DOMString <a href="#dom-keygen-keytype" title="dom-keygen-keytype">keytype</a>;
! 902: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
! 903:
! 904: readonly attribute DOMString <a href="#dom-keygen-type" title="dom-keygen-type">type</a>;
! 905:
! 906: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
! 907: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
! 908: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
! 909: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
! 910: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
! 911:
! 912: readonly attribute <span>NodeList</span> <a href="#dom-lfe-labels" title="dom-lfe-labels">labels</a>;
! 913: };</pre>
! 914: </dd>
! 915: </dl><p>The <code><a href="#the-keygen-element">keygen</a></code> element <a href="#represents">represents</a> a key
! 916: pair generator control. When the control's form is submitted, the
! 917: private key is stored in the local keystore, and the public key is
! 918: packaged and sent to the server.</p><p>The <dfn id="attr-keygen-challenge" title="attr-keygen-challenge"><code>challenge</code></dfn> attribute
! 919: may be specified. Its value will be packaged with the submitted
! 920: key.</p><p>The <dfn id="attr-keygen-keytype" title="attr-keygen-keytype"><code>keytype</code></dfn>
! 921: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute">enumerated attribute</a>. The following
! 922: table lists the keywords and states for the attribute — the
! 923: keywords in the left column map to the states listed in the cell in
! 924: the second column on the same row as the keyword. User agents are
! 925: not required to support these values, and must only recognise values
! 926: whose corresponding algorithms they support.</p><table><thead><tr><th> Keyword </th><th> State
! 927: </th></tr></thead><tbody><tr><td> <code title="">rsa</code>
! 928: </td><td> <i title="">RSA</i>
! 929: <!-- v2 (see below)
! 930: <tr>
! 931: <td> <code title="">ec</code>
! 932: <td> <i title="">EC</i>
! 933: -->
! 934: </td></tr></tbody></table><p>The <i>invalid value default</i> state is the <i title="">unknown</i> state. The <i>missing value default</i> state
! 935: is the <i title="">RSA</i> state, if it is supported, or the <i title="">unknown</i> state otherwise.</p><p class="note">This specification does not specify what key types
! 936: user agents are to support — it is possible for a user agent
! 937: to not support any key types at all.</p><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
! 938: explicitly associate the <code><a href="#the-keygen-element">keygen</a></code> element with its
! 939: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
! 940: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled">disabled</a></code> attribute is used to make
! 941: the control non-interactive and to prevent its value from being
! 942: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus">autofocus</a></code>
! 943: attribute controls focus.</p><dl class="domintro"><dt><var title="">keygen</var> . <code title="attr-keygen-type">type</code></dt>
! 944:
! 945: <dd>
! 946:
! 947: <p>Returns the string "<code title="">keygen</code>".</p>
! 948:
! 949: </dd>
! 950:
! 951: </dl><p class="note">This specification does not specify how the private
! 952: key generated is to be used. It is expected that after receiving the
! 953: <code><a href="#signedpublickeyandchallenge">SignedPublicKeyAndChallenge</a></code> (SPKAC) structure, the
! 954: server will generate a client certificate and offer it back to the
! 955: user for download; this certificate, once downloaded and stored in
! 956: the key store along with the private key, can then be used to
! 957: authenticate to services that use SSL and certificate
! 958: authentication.</p><!-- how does the UA know which private key is associated with a
! 959: certificate it gets back after the server has taken the public key
! 960: created by <keygen> and turned it into a client cert? --><div class="example">
! 961:
! 962: <p>To generate a key pair, add the private key to the user's key
! 963: store, and submit the public key to the server, markup such as the
! 964: following can be used:</p>
! 965:
! 966: <pre><form action="processkey.cgi" method="post" enctype="multipart/formdata">
! 967: <p><keygen name="key"></p>
! 968: <p><input type=submit value="Submit key..."></p>
! 969: </form></pre>
! 970:
! 971: <p>The server will then receive a form submission with a packaged
! 972: RSA public key as the value of "<code title="">key</code>". This
! 973: can then be used for various purposes, such as generating a client
! 974: certificate, as mentioned above.</p>
! 975:
! 976: </div><h4 id="the-output-element"><span class="secno">4.10.13 </span>The <dfn><code>output</code></dfn> element</h4><p class="XXX annotation"><b>Status: </b><i>Last call for comments</i></p><dl class="element"><dt>Categories</dt>
! 977: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
! 978: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
! 979: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a> and <a href="forms.html#category-reset" title="category-reset">resettable</a> <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
! 980: <dt>Contexts in which this element may be used:</dt>
! 981: <dd>Where <a href="content-models.html#phrasing-content">phrasing content</a> is expected.</dd>
! 982: <dt>Content model:</dt>
! 983: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
! 984: <dt>Content attributes:</dt>
! 985: <dd><a href="elements.html#global-attributes">Global attributes</a></dd>
! 986: <dd><code title="attr-output-for"><a href="#attr-output-for">for</a></code></dd>
! 987: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
! 988: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code></dd>
! 989: <dt>DOM interface:</dt>
! 990: <dd>
! 991: <pre class="idl">interface <dfn id="htmloutputelement">HTMLOutputElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
! 992: attribute DOMString <span title="dom-output-wrap">htmlFor</span>;
! 993: readonly attribute <a href="forms.html#htmlformelement">HTMLFormElement</a> <a href="#dom-fae-form" title="dom-fae-form">form</a>;
! 994: attribute DOMString <a href="#dom-fe-name" title="dom-fe-name">name</a>;
! 995:
! 996: readonly attribute DOMString <a href="#dom-output-type" title="dom-output-type">type</a>;
! 997: attribute DOMString <a href="#dom-output-defaultvalue" title="dom-output-defaultValue">defaultValue</a>;
! 998: attribute DOMString <a href="#dom-output-value" title="dom-output-value">value</a>;
! 999:
! 1000: readonly attribute boolean <a href="#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
! 1001: readonly attribute <a href="#validitystate">ValidityState</a> <a href="#dom-cva-validity" title="dom-cva-validity">validity</a>;
! 1002: readonly attribute DOMString <a href="#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
! 1003: boolean <a href="#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
! 1004: void <a href="#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(in DOMString error);
! 1005: };</pre>
! 1006: </dd>
! 1007: </dl><p>The <code><a href="#the-output-element">output</a></code> element <a href="#represents">represents</a> the result of a
! 1008: calculation.</p><p>The <dfn id="attr-output-for" title="attr-output-for"><code>for</code></dfn> content
! 1009: attribute allows an explicit relationship to be made between the
! 1010: result of a calculation and the elements that represent the values
! 1011: that went into the calculation or that otherwise influenced the
! 1012: calculation. The <code title="attr-output-for"><a href="#attr-output-for">for</a></code> attribute,
! 1013: if specified, must contain a string consisting of an <a href="common-microsyntaxes.html#unordered-set-of-unique-space-separated-tokens">unordered
! 1014: set of unique space-separated tokens</a>, each of which must have
! 1015: the value of an ID of an element in the same
! 1016: <code>Document</code>.</p><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code> attribute is used to
! 1017: explicitly associate the <code><a href="#the-output-element">output</a></code> element with its
! 1018: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name">name</a></code>
! 1019: attribute represents the element's name.</p><dl class="domintro"><dt><var title="">output</var> . <code title="dom-output-value"><a href="#dom-output-value">value</a></code> [ = <var title="">value</var> ]</dt>
! 1020:
! 1021: <dd>
! 1022:
! 1023: <p>Returns the element's current value.</p>
! 1024:
! 1025: <p>Can be set, to change the value.</p>
! 1026:
! 1027: </dd>
! 1028:
! 1029: <dt><var title="">output</var> . <code title="dom-output-defaultValue"><a href="#dom-output-defaultvalue">defaultValue</a></code> [ = <var title="">value</var> ]</dt>
! 1030:
! 1031: <dd>
! 1032:
! 1033: <p>Returns the element's current default value.</p>
! 1034:
! 1035: <p>Can be set, to change the default value.</p>
! 1036:
! 1037: </dd>
! 1038:
! 1039: <dt><var title="">output</var> . <code title="dom-output-type"><a href="#dom-output-type">type</a></code></dt>
! 1040:
! 1041: <dd>
! 1042:
! 1043: <p>Returns the string "<code title="">output</code>".</p>
! 1044:
! 1045: </dd>
! 1046:
! 1047: </dl><div class="example">
! 1048:
! 1049: <p>A simple calculator could use <code><a href="#the-output-element">output</a></code> for its
! 1050: display of calculated results:</p>
! 1051:
! 1052: <pre><form onsubmit="return false">
! 1053: <input name=a type=number step=any> +
! 1054: <input name=b type=number step=any> =
! 1055: <output onforminput="value = a.value + b.value"></output>
! 1056: </form></pre>
! 1057:
! 1058: </div></body></html>
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