Annotation of html5/spec/the-option-element.html, revision 1.92
1.88 mike 1: <!DOCTYPE html>
1.92 ! mike 2: <html id="overview" lang="en-US-x-Hixie"><head><title>4.10.12 The option element — HTML5</title><style type="text/css">
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1.1 mike 233:
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1.91 mike 355: </script><script src="load-timeout.js"></script>
1.1 mike 356: <script src="link-fixup.js"></script>
357: <link href="the-optgroup-element.html" title="4.10.11 The optgroup element" rel="prev">
358: <link href="index.html#contents" title="Table of contents" rel="contents">
359: <link href="the-textarea-element.html" title="4.10.13 The textarea element" rel="next">
1.22 mike 360: </head><body onload="fixBrokenLink();" class="split chapter"><div class="head" id="head">
1.1 mike 361: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
362:
363: <h1>HTML5</h1>
1.90 mike 364: <h2 class="no-num no-toc" id="a-vocabulary-and-associated-apis-for-html-and-xhtml">A vocabulary and associated APIs for HTML and XHTML</h2><p>This is revision 1.5610.</p>
1.85 mike 365:
1.90 mike 366: <h2 class="no-num no-toc" id="w3c-working-draft-20-april-2012">W3C Working Draft 20 April 2012</h2>
1.85 mike 367: </div>
1.1 mike 368:
1.85 mike 369: <nav class="prev_next">
1.1 mike 370: <a href="the-optgroup-element.html">← 4.10.11 The optgroup element</a> –
371: <a href="index.html#contents">Table of contents</a> –
372: <a href="the-textarea-element.html">4.10.13 The textarea element →</a>
373: </nav>
374:
1.85 mike 375: <h4 id="the-option-element"><span class="secno">4.10.12 </span>The <dfn><code>option</code></dfn> element</h4>
376:
377: <dl class="element"><dt><a href="element-definitions.html#element-dfn-categories" title="element-dfn-categories">Categories</a>:</dt>
1.1 mike 378: <dd>None.</dd>
1.25 mike 379: <dt><a href="element-definitions.html#element-dfn-contexts" title="element-dfn-contexts">Contexts in which this element can be used</a>:</dt>
1.1 mike 380: <dd>As a child of a <code><a href="the-select-element.html#the-select-element">select</a></code> element.</dd>
381: <dd>As a child of a <code><a href="the-datalist-element.html#the-datalist-element">datalist</a></code> element.</dd>
382: <dd>As a child of an <code><a href="the-optgroup-element.html#the-optgroup-element">optgroup</a></code> element.</dd>
1.25 mike 383: <dt><a href="element-definitions.html#element-dfn-content-model" title="element-dfn-content-model">Content model</a>:</dt>
1.1 mike 384: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
1.25 mike 385: <dt><a href="element-definitions.html#element-dfn-attributes" title="element-dfn-attributes">Content attributes</a>:</dt>
1.1 mike 386: <dd><a href="global-attributes.html#global-attributes">Global attributes</a></dd>
387: <dd><code title="attr-option-disabled"><a href="#attr-option-disabled">disabled</a></code></dd>
388: <dd><code title="attr-option-label"><a href="#attr-option-label">label</a></code></dd>
389: <dd><code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code></dd>
390: <dd><code title="attr-option-value"><a href="#attr-option-value">value</a></code></dd>
1.25 mike 391: <dt><a href="element-definitions.html#element-dfn-dom" title="element-dfn-dom">DOM interface</a>:</dt>
1.1 mike 392: <dd>
393: <pre class="idl">[NamedConstructor=<a href="#dom-option" title="dom-option">Option</a>(),
394: NamedConstructor=<a href="#dom-option-t" title="dom-option-t">Option</a>(DOMString text),
395: NamedConstructor=<a href="#dom-option-tv" title="dom-option-tv">Option</a>(DOMString text, DOMString value),
396: NamedConstructor=<a href="#dom-option-tvd" title="dom-option-tvd">Option</a>(DOMString text, DOMString value, boolean defaultSelected),
397: NamedConstructor=<a href="#dom-option-tvds" title="dom-option-tvds">Option</a>(DOMString text, DOMString value, boolean defaultSelected, boolean selected)]
398: interface <dfn id="htmloptionelement">HTMLOptionElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
399: attribute boolean <a href="#dom-option-disabled" title="dom-option-disabled">disabled</a>;
400: readonly attribute <a href="the-form-element.html#htmlformelement">HTMLFormElement</a>? <a href="#dom-option-form" title="dom-option-form">form</a>;
401: attribute DOMString <a href="#dom-option-label" title="dom-option-label">label</a>;
402: attribute boolean <a href="#dom-option-defaultselected" title="dom-option-defaultSelected">defaultSelected</a>;
403: attribute boolean <a href="#dom-option-selected" title="dom-option-selected">selected</a>;
404: attribute DOMString <a href="#dom-option-value" title="dom-option-value">value</a>;
405:
406: attribute DOMString <a href="#dom-option-text" title="dom-option-text">text</a>;
407: readonly attribute long <a href="#dom-option-index" title="dom-option-index">index</a>;
408: };</pre>
409: </dd>
410: </dl><p>The <code><a href="#the-option-element">option</a></code> element <a href="rendering.html#represents">represents</a> an option
411: in a <code><a href="the-select-element.html#the-select-element">select</a></code> element or as part of a list of suggestions
1.85 mike 412: in a <code><a href="the-datalist-element.html#the-datalist-element">datalist</a></code> element.</p>
413:
414: <p>In certain circumstances described in the definition of the
1.1 mike 415: <code><a href="the-select-element.html#the-select-element">select</a></code> element, an <code><a href="#the-option-element">option</a></code> element can be a
416: <code><a href="the-select-element.html#the-select-element">select</a></code> element's <a href="the-select-element.html#placeholder-label-option">placeholder label option</a>.
417: A <a href="the-select-element.html#placeholder-label-option">placeholder label option</a> does not represent an actual
418: option, but instead represents a label for the <code><a href="the-select-element.html#the-select-element">select</a></code>
1.85 mike 419: control.</p>
420:
421: <p>The <dfn id="attr-option-disabled" title="attr-option-disabled"><code>disabled</code></dfn>
1.1 mike 422: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. An
423: <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
424: if it is a child of an <code><a href="the-optgroup-element.html#the-optgroup-element">optgroup</a></code> element whose <code title="attr-optgroup-disabled"><a href="the-optgroup-element.html#attr-optgroup-disabled">disabled</a></code> attribute is
1.85 mike 425: present.</p>
426:
427: <div class="impl">
1.1 mike 428:
429: <p>An <code><a href="#the-option-element">option</a></code> element that is <a href="#attr-option-disabled" title="attr-option-disabled">disabled</a> must prevent any <code title="event-click"><a href="infrastructure.html#event-click">click</a></code> events that are <a href="webappapis.html#queue-a-task" title="queue
430: a task">queued</a> on the <a href="webappapis.html#user-interaction-task-source">user interaction task
431: source</a> from being dispatched on the element.</p>
432:
1.85 mike 433: </div>
434:
435: <p>The <dfn id="attr-option-label" title="attr-option-label"><code>label</code></dfn>
1.1 mike 436: 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>
437: element is the value of the <code title="attr-option-label"><a href="#attr-option-label">label</a></code> content attribute, if there
1.85 mike 438: is one, or, if there is not, the value of the element's <code title="dom-option-text"><a href="#dom-option-text">text</a></code> IDL attribute.</p>
439:
440: <p>The <dfn id="attr-option-value" title="attr-option-value"><code>value</code></dfn>
1.1 mike 441: 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>
442: element is the value of the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> content attribute, if there
1.85 mike 443: is one, or, if there is not, the value of the element's <code title="dom-option-text"><a href="#dom-option-text">text</a></code> IDL attribute.</p>
444:
445: <p>The <dfn id="attr-option-selected" title="attr-option-selected"><code>selected</code></dfn>
1.1 mike 446: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. It represents the
447: default <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of the
1.85 mike 448: element.</p>
449:
450: <div class="impl">
1.1 mike 451:
452: <p>The <dfn id="concept-option-selectedness" title="concept-option-selectedness">selectedness</dfn>
453: of an <code><a href="#the-option-element">option</a></code> element is a boolean state, initially
454: false. Except where otherwise
455: specified, when the element is created, its <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> must be set
456: to true if the element has a <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute. Whenever an
457: <code><a href="#the-option-element">option</a></code> element's <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute is added, its
458: <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> must
459: be set to true.</p>
460:
461: <p class="note">The <code title="dom-option-tvd"><a href="#dom-option-tvd">Option()</a></code>
462: constructor with three or fewer arguments overrides the initial
463: state of the <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> state to
464: always be false even if the third argument is true (implying that a
465: <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute is to
466: be set). The fourth argument can be used to explicitly set the
467: initial <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> state when
468: using the constructor.</p>
469:
470:
471:
1.85 mike 472: </div>
473:
474: <p>A <code><a href="the-select-element.html#the-select-element">select</a></code> element whose <code title="attr-select-multiple"><a href="the-select-element.html#attr-select-multiple">multiple</a></code> attribute is not
1.1 mike 475: specified must not have more than one descendant <code><a href="#the-option-element">option</a></code>
476: element with its <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code>
1.85 mike 477: attribute set.</p>
478:
479: <div class="impl">
1.1 mike 480:
481: <p>An <code><a href="#the-option-element">option</a></code> element's <dfn id="concept-option-index" title="concept-option-index">index</dfn> is the number of
482: <code><a href="#the-option-element">option</a></code> element that are in the same <a href="the-select-element.html#concept-select-option-list" title="concept-select-option-list">list of options</a> but that
483: come before it in <a href="infrastructure.html#tree-order">tree order</a>. If the
484: <code><a href="#the-option-element">option</a></code> element is not in a <a href="the-select-element.html#concept-select-option-list" title="concept-select-option-list">list of options</a>, then the
485: <code><a href="#the-option-element">option</a></code> element's <a href="#concept-option-index" title="concept-option-index">index</a> is zero.</p>
486:
1.85 mike 487: </div>
488:
489:
490: <dl class="domintro"><dt><var title="">option</var> . <code title="dom-option-selected"><a href="#dom-option-selected">selected</a></code></dt>
1.1 mike 491:
492: <dd>
493:
494: <p>Returns true if the element is selected, and false otherwise.</p>
495:
496: <p>Can be set, to override the current state of the element.</p>
497:
498: </dd>
499:
500: <dt><var title="">option</var> . <code title="dom-option-index"><a href="#dom-option-index">index</a></code></dt>
501:
502: <dd>
503:
504: <p>Returns the index of the element in its <code><a href="the-select-element.html#the-select-element">select</a></code>
505: element's <code title="dom-select-options"><a href="the-select-element.html#dom-select-options">options</a></code>
506: list.</p>
507:
508: </dd>
509:
510: <dt><var title="">option</var> . <code title="dom-option-form"><a href="#dom-option-form">form</a></code></dt>
511:
512: <dd>
513:
514: <p>Returns the element's <code><a href="the-form-element.html#the-form-element">form</a></code> element, if any, or
515: null otherwise.</p>
516:
517: </dd>
518:
519: <dt><var title="">option</var> . <code title="dom-option-text"><a href="#dom-option-text">text</a></code></dt>
520:
521: <dd>
522:
523: <p>Same as <code><a href="infrastructure.html#textcontent">textContent</a></code>, except that spaces are collapsed.</p>
524:
525: </dd>
526:
527: <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>
528:
529: <dd>
530:
531: <p>Returns a new <code><a href="#the-option-element">option</a></code> element.</p>
532:
533: <p>The <var title="">text</var> argument sets the contents of the element.</p>
534: <p>The <var title="">value</var> argument sets the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute.</p>
535: <p>The <var title="">defaultSelected</var> argument sets the <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute.</p>
536: <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>
537:
538: </dd>
539:
540: </dl><div class="impl">
541:
542: <p>The <dfn id="dom-option-disabled" title="dom-option-disabled"><code>disabled</code></dfn>
543: IDL attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the content attribute of the
544: same name. The <dfn id="dom-option-defaultselected" title="dom-option-defaultSelected"><code>defaultSelected</code></dfn>
545: IDL attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> content attribute.</p>
546:
547: <p>The <dfn id="dom-option-label" title="dom-option-label"><code>label</code></dfn> IDL
1.59 mike 548: attribute, on getting, must return the element's <a href="#concept-option-label" title="concept-option-label">label</a>. On setting, the element's
549: <code title="attr-option-label"><a href="#attr-option-label">label</a></code> content attribute must
550: be set to the new value.</p>
1.1 mike 551:
552: <p>The <dfn id="dom-option-value" title="dom-option-value"><code>value</code></dfn> IDL
1.59 mike 553: attribute, on getting, must return the element's <a href="#concept-option-value" title="concept-option-value">value</a>. On setting, the element's
554: <code title="attr-option-value"><a href="#attr-option-value">value</a></code> content attribute must
555: be set to the new value.</p>
1.1 mike 556:
557: <p>The <dfn id="dom-option-selected" title="dom-option-selected"><code>selected</code></dfn>
558: IDL attribute, on getting, must return true if the element's <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> is true, and
559: false otherwise. On setting, it must set the element's <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> to the new
560: value.</p>
561:
562: <p>The <dfn id="dom-option-index" title="dom-option-index"><code>index</code></dfn> IDL
563: attribute must return the element's <a href="#concept-option-index" title="concept-option-index">index</a>.</p>
564:
565: <p>The <dfn id="dom-option-text" title="dom-option-text"><code>text</code></dfn> IDL
566: attribute, on getting, must return the value of the
567: <code><a href="infrastructure.html#textcontent">textContent</a></code> IDL attribute on the element, with <a href="common-microsyntaxes.html#strip-leading-and-trailing-whitespace" title="strip leading and trailing whitespace">leading and trailing
568: whitespace stripped</a>, and with any sequences of two or more
569: <a href="common-microsyntaxes.html#space-character" title="space character">space characters</a> replaced by a
570: single U+0020 SPACE character. On setting, it must act as if the
571: <code><a href="infrastructure.html#textcontent">textContent</a></code> IDL attribute on the element had been set
572: to the new value.</p>
573:
574: <p>The <dfn id="dom-option-form" title="dom-option-form"><code>form</code></dfn> IDL
575: attribute's behavior depends on whether the <code><a href="#the-option-element">option</a></code>
576: element is in a <code><a href="the-select-element.html#the-select-element">select</a></code> element or not. If the
577: <code><a href="#the-option-element">option</a></code> has a <code><a href="the-select-element.html#the-select-element">select</a></code> element as its parent,
578: or has an <code><a href="the-optgroup-element.html#the-optgroup-element">optgroup</a></code> element as its parent and that
579: <code><a href="the-optgroup-element.html#the-optgroup-element">optgroup</a></code> element has a <code><a href="the-select-element.html#the-select-element">select</a></code> element as
580: its parent, then the <code title="dom-option-form"><a href="#dom-option-form">form</a></code> IDL
581: attribute must return the same value as the <code title="dom-fae-form"><a href="association-of-controls-and-forms.html#dom-fae-form">form</a></code> IDL attribute on that
582: <code><a href="the-select-element.html#the-select-element">select</a></code> element. Otherwise, it must return null.</p>
583:
584: <p>Several constructors are provided for creating
585: <code><a href="#htmloptionelement">HTMLOptionElement</a></code> objects (in addition to the factory
586: methods from DOM Core such as <code title="">createElement()</code>): <dfn id="dom-option" title="dom-option"><code>Option()</code></dfn>, <dfn id="dom-option-t" title="dom-option-t"><code>Option(<var title="">text</var>)</code></dfn>, <dfn id="dom-option-tv" title="dom-option-tv"><code>Option(<var title="">text</var>, <var title="">value</var>)</code></dfn>, <dfn id="dom-option-tvd" title="dom-option-tvd"><code>Option(<var title="">text</var>, <var title="">value</var>, <var title="">defaultSelected</var>)</code></dfn>, and <dfn id="dom-option-tvds" title="dom-option-tvds"><code>Option(<var title="">text</var>, <var title="">value</var>, <var title="">defaultSelected</var>, <var title="">selected</var>)</code></dfn>. When invoked as constructors,
587: these must return a new <code><a href="#htmloptionelement">HTMLOptionElement</a></code> object (a new
588: <code><a href="#the-option-element">option</a></code> element). If the <var title="">text</var>
589: argument is present, the new object must have as its only child a
1.46 mike 590: <code><a href="infrastructure.html#text">Text</a></code> node whose data is the value of that argument. If
591: the <var title="">value</var> argument is present, the new object
592: must have a <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute
593: set with the value of the argument as its value. If the <var title="">defaultSelected</var> argument is present and true, the new
1.1 mike 594: object must have a <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute set with no
595: value. If the <var title="">selected</var> argument is present and
596: true, the new object must have its <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to true;
597: otherwise the fourth argument is absent or false, and the <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> must be set
598: to false, even if the <var title="">defaultSelected</var> argument
599: is present and true. The element's document must be the <a href="browsers.html#active-document">active
600: document</a> of the <a href="browsers.html#browsing-context">browsing context</a> of the
601: <code><a href="browsers.html#window">Window</a></code> object on which the interface object of the
602: invoked constructor is found.</p>
603:
1.85 mike 604: </div>
605:
606:
607:
608:
609: </body></html>
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