Annotation of html5/spec/the-option-element.html, revision 1.154
1.88 mike 1: <!DOCTYPE html>
1.96 mike 2: <html lang="en-US-x-Hixie"><head><title>4.10.12 The option element — HTML5</title><link rel="stylesheet" href="alert.css"><style type="text/css">
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1.1 mike 197:
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322: <link href="index.html#contents" title="Table of contents" rel="contents">
323: <link href="the-textarea-element.html" title="4.10.13 The textarea element" rel="next">
1.22 mike 324: </head><body onload="fixBrokenLink();" class="split chapter"><div class="head" id="head">
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326:
327: <h1>HTML5</h1>
1.154 ! mike 328: <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 1.5691.</p>
1.85 mike 329:
1.154 ! mike 330: <h2 class="no-num no-toc" id="editor-s-draft-22-june-2012">Editor's Draft 22 June 2012</h2>
1.85 mike 331: </div>
1.1 mike 332:
1.85 mike 333: <nav class="prev_next">
1.1 mike 334: <a href="the-optgroup-element.html">← 4.10.11 The optgroup element</a> –
335: <a href="index.html#contents">Table of contents</a> –
336: <a href="the-textarea-element.html">4.10.13 The textarea element →</a>
337: </nav>
338:
1.85 mike 339: <h4 id="the-option-element"><span class="secno">4.10.12 </span>The <dfn><code>option</code></dfn> element</h4>
340:
341: <dl class="element"><dt><a href="element-definitions.html#element-dfn-categories" title="element-dfn-categories">Categories</a>:</dt>
1.1 mike 342: <dd>None.</dd>
1.25 mike 343: <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 344: <dd>As a child of a <code><a href="the-select-element.html#the-select-element">select</a></code> element.</dd>
345: <dd>As a child of a <code><a href="the-datalist-element.html#the-datalist-element">datalist</a></code> element.</dd>
346: <dd>As a child of an <code><a href="the-optgroup-element.html#the-optgroup-element">optgroup</a></code> element.</dd>
1.25 mike 347: <dt><a href="element-definitions.html#element-dfn-content-model" title="element-dfn-content-model">Content model</a>:</dt>
1.1 mike 348: <dd><a href="content-models.html#text-content" title="text content">Text</a>.</dd>
1.25 mike 349: <dt><a href="element-definitions.html#element-dfn-attributes" title="element-dfn-attributes">Content attributes</a>:</dt>
1.1 mike 350: <dd><a href="global-attributes.html#global-attributes">Global attributes</a></dd>
351: <dd><code title="attr-option-disabled"><a href="#attr-option-disabled">disabled</a></code></dd>
352: <dd><code title="attr-option-label"><a href="#attr-option-label">label</a></code></dd>
353: <dd><code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code></dd>
354: <dd><code title="attr-option-value"><a href="#attr-option-value">value</a></code></dd>
1.25 mike 355: <dt><a href="element-definitions.html#element-dfn-dom" title="element-dfn-dom">DOM interface</a>:</dt>
1.1 mike 356: <dd>
357: <pre class="idl">[NamedConstructor=<a href="#dom-option" title="dom-option">Option</a>(),
358: NamedConstructor=<a href="#dom-option-t" title="dom-option-t">Option</a>(DOMString text),
359: NamedConstructor=<a href="#dom-option-tv" title="dom-option-tv">Option</a>(DOMString text, DOMString value),
360: NamedConstructor=<a href="#dom-option-tvd" title="dom-option-tvd">Option</a>(DOMString text, DOMString value, boolean defaultSelected),
361: NamedConstructor=<a href="#dom-option-tvds" title="dom-option-tvds">Option</a>(DOMString text, DOMString value, boolean defaultSelected, boolean selected)]
362: interface <dfn id="htmloptionelement">HTMLOptionElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
363: attribute boolean <a href="#dom-option-disabled" title="dom-option-disabled">disabled</a>;
364: readonly attribute <a href="the-form-element.html#htmlformelement">HTMLFormElement</a>? <a href="#dom-option-form" title="dom-option-form">form</a>;
365: attribute DOMString <a href="#dom-option-label" title="dom-option-label">label</a>;
366: attribute boolean <a href="#dom-option-defaultselected" title="dom-option-defaultSelected">defaultSelected</a>;
367: attribute boolean <a href="#dom-option-selected" title="dom-option-selected">selected</a>;
368: attribute DOMString <a href="#dom-option-value" title="dom-option-value">value</a>;
369:
370: attribute DOMString <a href="#dom-option-text" title="dom-option-text">text</a>;
371: readonly attribute long <a href="#dom-option-index" title="dom-option-index">index</a>;
372: };</pre>
373: </dd>
374: </dl><p>The <code><a href="#the-option-element">option</a></code> element <a href="rendering.html#represents">represents</a> an option
375: 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 376: in a <code><a href="the-datalist-element.html#the-datalist-element">datalist</a></code> element.</p>
377:
378: <p>In certain circumstances described in the definition of the
1.1 mike 379: <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
380: <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>.
381: A <a href="the-select-element.html#placeholder-label-option">placeholder label option</a> does not represent an actual
382: option, but instead represents a label for the <code><a href="the-select-element.html#the-select-element">select</a></code>
1.85 mike 383: control.</p>
384:
385: <p>The <dfn id="attr-option-disabled" title="attr-option-disabled"><code>disabled</code></dfn>
1.1 mike 386: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. An
387: <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
388: 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 389: present.</p>
390:
391: <div class="impl">
1.1 mike 392:
393: <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
394: a task">queued</a> on the <a href="webappapis.html#user-interaction-task-source">user interaction task
395: source</a> from being dispatched on the element.</p>
396:
1.85 mike 397: </div>
398:
399: <p>The <dfn id="attr-option-label" title="attr-option-label"><code>label</code></dfn>
1.1 mike 400: 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>
401: 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 402: 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>
403:
404: <p>The <dfn id="attr-option-value" title="attr-option-value"><code>value</code></dfn>
1.1 mike 405: 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>
406: 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 407: 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>
408:
409: <p>The <dfn id="attr-option-selected" title="attr-option-selected"><code>selected</code></dfn>
1.1 mike 410: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a>. It represents the
411: default <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> of the
1.85 mike 412: element.</p>
413:
414: <div class="impl">
1.1 mike 415:
416: <p>The <dfn id="concept-option-selectedness" title="concept-option-selectedness">selectedness</dfn>
417: of an <code><a href="#the-option-element">option</a></code> element is a boolean state, initially
418: false. Except where otherwise
419: specified, when the element is created, its <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> must be set
420: to true if the element has a <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute. Whenever an
421: <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
422: <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> must
423: be set to true.</p>
424:
425: <p class="note">The <code title="dom-option-tvd"><a href="#dom-option-tvd">Option()</a></code>
426: constructor with three or fewer arguments overrides the initial
427: state of the <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> state to
428: always be false even if the third argument is true (implying that a
429: <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute is to
430: be set). The fourth argument can be used to explicitly set the
431: initial <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> state when
432: using the constructor.</p>
433:
434:
435:
1.85 mike 436: </div>
437:
438: <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 439: specified must not have more than one descendant <code><a href="#the-option-element">option</a></code>
440: element with its <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code>
1.85 mike 441: attribute set.</p>
442:
443: <div class="impl">
1.1 mike 444:
445: <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
446: <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
447: come before it in <a href="infrastructure.html#tree-order">tree order</a>. If the
448: <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
449: <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>
450:
1.85 mike 451: </div>
452:
453:
454: <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 455:
456: <dd>
457:
458: <p>Returns true if the element is selected, and false otherwise.</p>
459:
460: <p>Can be set, to override the current state of the element.</p>
461:
462: </dd>
463:
464: <dt><var title="">option</var> . <code title="dom-option-index"><a href="#dom-option-index">index</a></code></dt>
465:
466: <dd>
467:
468: <p>Returns the index of the element in its <code><a href="the-select-element.html#the-select-element">select</a></code>
469: element's <code title="dom-select-options"><a href="the-select-element.html#dom-select-options">options</a></code>
470: list.</p>
471:
472: </dd>
473:
474: <dt><var title="">option</var> . <code title="dom-option-form"><a href="#dom-option-form">form</a></code></dt>
475:
476: <dd>
477:
478: <p>Returns the element's <code><a href="the-form-element.html#the-form-element">form</a></code> element, if any, or
479: null otherwise.</p>
480:
481: </dd>
482:
483: <dt><var title="">option</var> . <code title="dom-option-text"><a href="#dom-option-text">text</a></code></dt>
484:
485: <dd>
486:
487: <p>Same as <code><a href="infrastructure.html#textcontent">textContent</a></code>, except that spaces are collapsed.</p>
488:
489: </dd>
490:
491: <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>
492:
493: <dd>
494:
495: <p>Returns a new <code><a href="#the-option-element">option</a></code> element.</p>
496:
497: <p>The <var title="">text</var> argument sets the contents of the element.</p>
498: <p>The <var title="">value</var> argument sets the <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute.</p>
499: <p>The <var title="">defaultSelected</var> argument sets the <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute.</p>
500: <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>
501:
502: </dd>
503:
504: </dl><div class="impl">
505:
506: <p>The <dfn id="dom-option-disabled" title="dom-option-disabled"><code>disabled</code></dfn>
507: IDL attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the content attribute of the
508: same name. The <dfn id="dom-option-defaultselected" title="dom-option-defaultSelected"><code>defaultSelected</code></dfn>
509: 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>
510:
511: <p>The <dfn id="dom-option-label" title="dom-option-label"><code>label</code></dfn> IDL
1.59 mike 512: attribute, on getting, must return the element's <a href="#concept-option-label" title="concept-option-label">label</a>. On setting, the element's
513: <code title="attr-option-label"><a href="#attr-option-label">label</a></code> content attribute must
514: be set to the new value.</p>
1.1 mike 515:
516: <p>The <dfn id="dom-option-value" title="dom-option-value"><code>value</code></dfn> IDL
1.59 mike 517: attribute, on getting, must return the element's <a href="#concept-option-value" title="concept-option-value">value</a>. On setting, the element's
518: <code title="attr-option-value"><a href="#attr-option-value">value</a></code> content attribute must
519: be set to the new value.</p>
1.1 mike 520:
521: <p>The <dfn id="dom-option-selected" title="dom-option-selected"><code>selected</code></dfn>
522: 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
523: false otherwise. On setting, it must set the element's <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> to the new
524: value.</p>
525:
526: <p>The <dfn id="dom-option-index" title="dom-option-index"><code>index</code></dfn> IDL
527: attribute must return the element's <a href="#concept-option-index" title="concept-option-index">index</a>.</p>
528:
529: <p>The <dfn id="dom-option-text" title="dom-option-text"><code>text</code></dfn> IDL
530: attribute, on getting, must return the value of the
531: <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
532: whitespace stripped</a>, and with any sequences of two or more
533: <a href="common-microsyntaxes.html#space-character" title="space character">space characters</a> replaced by a
534: single U+0020 SPACE character. On setting, it must act as if the
535: <code><a href="infrastructure.html#textcontent">textContent</a></code> IDL attribute on the element had been set
536: to the new value.</p>
537:
538: <p>The <dfn id="dom-option-form" title="dom-option-form"><code>form</code></dfn> IDL
539: attribute's behavior depends on whether the <code><a href="#the-option-element">option</a></code>
540: element is in a <code><a href="the-select-element.html#the-select-element">select</a></code> element or not. If the
541: <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,
542: or has an <code><a href="the-optgroup-element.html#the-optgroup-element">optgroup</a></code> element as its parent and that
543: <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
544: its parent, then the <code title="dom-option-form"><a href="#dom-option-form">form</a></code> IDL
545: 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
546: <code><a href="the-select-element.html#the-select-element">select</a></code> element. Otherwise, it must return null.</p>
547:
548: <p>Several constructors are provided for creating
549: <code><a href="#htmloptionelement">HTMLOptionElement</a></code> objects (in addition to the factory
550: 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,
551: these must return a new <code><a href="#htmloptionelement">HTMLOptionElement</a></code> object (a new
552: <code><a href="#the-option-element">option</a></code> element). If the <var title="">text</var>
553: argument is present, the new object must have as its only child a
1.46 mike 554: <code><a href="infrastructure.html#text">Text</a></code> node whose data is the value of that argument. If
555: the <var title="">value</var> argument is present, the new object
556: must have a <code title="attr-option-value"><a href="#attr-option-value">value</a></code> attribute
557: 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 558: object must have a <code title="attr-option-selected"><a href="#attr-option-selected">selected</a></code> attribute set with no
559: value. If the <var title="">selected</var> argument is present and
560: true, the new object must have its <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> set to true;
561: otherwise the fourth argument is absent or false, and the <a href="#concept-option-selectedness" title="concept-option-selectedness">selectedness</a> must be set
562: to false, even if the <var title="">defaultSelected</var> argument
563: is present and true. The element's document must be the <a href="browsers.html#active-document">active
564: document</a> of the <a href="browsers.html#browsing-context">browsing context</a> of the
565: <code><a href="browsers.html#window">Window</a></code> object on which the interface object of the
566: invoked constructor is found.</p>
567:
1.85 mike 568: </div>
569:
570:
571:
572:
573: </body></html>
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