Annotation of html5/spec/the-object-element.html, revision 1.45
1.1 mike 1: <!DOCTYPE html>
2: <html lang="en-US-x-Hixie"><head><title>4.8.4 The object element — HTML5</title><style type="text/css">
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299: }
300:
301: </style><link href="data:text/css," id="complete" rel="stylesheet" title="Complete specification"><link href="data:text/css,.impl%20%7B%20display:%20none;%20%7D%0Ahtml%20%7B%20border:%20solid%20yellow;%20%7D%20.domintro:before%20%7B%20display:%20none;%20%7D" id="author" rel="alternate stylesheet" title="Author documentation only"><link href="data:text/css,.impl%20%7B%20background:%20%23FFEEEE;%20%7D%20.domintro:before%20%7B%20background:%20%23FFEEEE;%20%7D" id="highlight" rel="alternate stylesheet" title="Highlight implementation requirements"><script type="text/javascript">
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319: </script>
320: <script src="link-fixup.js"></script>
321: <link href="the-embed-element.html" title="4.8.3 The embed element" rel="prev">
322: <link href="index.html#contents" title="Table of contents" rel="contents">
323: <link href="the-param-element.html" title="4.8.5 The param element" rel="next">
1.22 mike 324: </head><body onload="fixBrokenLink();" class="split chapter"><div class="head" id="head">
1.1 mike 325: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
326:
327: <h1>HTML5</h1>
1.45 ! 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 1.5541.</p>
1.1 mike 329:
1.44 mike 330: <h2 class="no-num no-toc" id="editor-s-draft-31-january-2012">Editor's Draft 31 January 2012</h2>
1.1 mike 331: </div><nav class="prev_next">
332: <a href="the-embed-element.html">← 4.8.3 The embed element</a> –
333: <a href="index.html#contents">Table of contents</a> –
334: <a href="the-param-element.html">4.8.5 The param element →</a>
335: </nav>
336:
1.25 mike 337: <h4 id="the-object-element"><span class="secno">4.8.4 </span>The <dfn><code>object</code></dfn> element</h4><dl class="element"><dt><a href="element-definitions.html#element-dfn-categories" title="element-dfn-categories">Categories</a>:</dt>
1.1 mike 338: <dd><a href="content-models.html#flow-content">Flow content</a>.</dd>
339: <dd><a href="content-models.html#phrasing-content">Phrasing content</a>.</dd>
340: <dd><a href="content-models.html#embedded-content">Embedded content</a>.</dd>
341: <dd>If the element has a <code title="attr-hyperlink-usemap"><a href="image-maps.html#attr-hyperlink-usemap">usemap</a></code> attribute: <a href="content-models.html#interactive-content">Interactive content</a>.</dd>
342: <dd><a href="forms.html#category-listed" title="category-listed">Listed</a>, <a href="forms.html#category-submit" title="category-submit">submittable</a>, <a href="forms.html#form-associated-element">form-associated element</a>.</dd>
343: <dd><a href="content-models.html#palpable-content">Palpable content</a>.</dd>
1.25 mike 344: <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 345: <dd>Where <a href="content-models.html#embedded-content">embedded content</a> is expected.</dd>
1.25 mike 346: <dt><a href="element-definitions.html#element-dfn-content-model" title="element-dfn-content-model">Content model</a>:</dt>
1.1 mike 347: <dd>Zero or more <code><a href="the-param-element.html#the-param-element">param</a></code> elements, then, <a href="content-models.html#transparent">transparent</a>.</dd>
1.25 mike 348: <dt><a href="element-definitions.html#element-dfn-attributes" title="element-dfn-attributes">Content attributes</a>:</dt>
1.1 mike 349: <dd><a href="global-attributes.html#global-attributes">Global attributes</a></dd>
350: <dd><code title="attr-object-data"><a href="#attr-object-data">data</a></code></dd>
351: <dd><code title="attr-object-type"><a href="#attr-object-type">type</a></code></dd>
352: <dd><code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code></dd>
353: <dd><code title="attr-object-name"><a href="#attr-object-name">name</a></code></dd>
354: <dd><code title="attr-hyperlink-usemap"><a href="image-maps.html#attr-hyperlink-usemap">usemap</a></code></dd>
355: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form">form</a></code></dd>
356: <dd><code title="attr-dim-width"><a href="dimension-attributes.html#attr-dim-width">width</a></code></dd>
357: <dd><code title="attr-dim-height"><a href="dimension-attributes.html#attr-dim-height">height</a></code></dd>
1.25 mike 358: <dt><a href="element-definitions.html#element-dfn-dom" title="element-dfn-dom">DOM interface</a>:</dt>
1.1 mike 359: <dd>
360: <pre class="idl">interface <dfn id="htmlobjectelement">HTMLObjectElement</dfn> : <a href="elements.html#htmlelement">HTMLElement</a> {
361: attribute DOMString <a href="#dom-object-data" title="dom-object-data">data</a>;
362: attribute DOMString <a href="#dom-object-type" title="dom-object-type">type</a>;
363: attribute boolean <a href="#dom-object-typemustmatch" title="dom-object-typeMustMatch">typeMustMatch</a>;
364: attribute DOMString <a href="#dom-object-name" title="dom-object-name">name</a>;
365: attribute DOMString <a href="#dom-object-usemap" title="dom-object-useMap">useMap</a>;
366: readonly attribute <a href="the-form-element.html#htmlformelement">HTMLFormElement</a>? <a href="association-of-controls-and-forms.html#dom-fae-form" title="dom-fae-form">form</a>;
367: attribute DOMString <a href="dimension-attributes.html#dom-dim-width" title="dom-dim-width">width</a>;
368: attribute DOMString <a href="dimension-attributes.html#dom-dim-height" title="dom-dim-height">height</a>;
369: readonly attribute Document? <a href="#dom-object-contentdocument" title="dom-object-contentDocument">contentDocument</a>;
370: readonly attribute <a href="browsers.html#windowproxy">WindowProxy</a>? <a href="#dom-object-contentwindow" title="dom-object-contentWindow">contentWindow</a>;
371:
372: readonly attribute boolean <a href="constraints.html#dom-cva-willvalidate" title="dom-cva-willValidate">willValidate</a>;
373: readonly attribute <a href="constraints.html#validitystate">ValidityState</a> <a href="constraints.html#dom-cva-validity" title="dom-cva-validity">validity</a>;
374: readonly attribute DOMString <a href="constraints.html#dom-cva-validationmessage" title="dom-cva-validationMessage">validationMessage</a>;
375: boolean <a href="constraints.html#dom-cva-checkvalidatity" title="dom-cva-checkValidatity">checkValidity</a>();
376: void <a href="constraints.html#dom-cva-setcustomvalidity" title="dom-cva-setCustomValidity">setCustomValidity</a>(DOMString error);
1.34 mike 377:
378: <a href="#dom-object-caller" title="dom-object-caller">legacycaller</a> any (any... arguments);
1.1 mike 379: };</pre>
380: <div class="impl">
381: <p>Depending on the type of content instantiated by the
382: <code><a href="#the-object-element">object</a></code> element, the node also supports other
383: interfaces.</p>
384: </div>
385: </dd>
386: </dl><p>The <code><a href="#the-object-element">object</a></code> element can represent an external
387: resource, which, depending on the type of the resource, will either
388: be treated as an image, as a <a href="browsers.html#nested-browsing-context">nested browsing context</a>,
389: or as an external resource to be processed by a
390: <a href="infrastructure.html#plugin">plugin</a>.</p><p>The <dfn id="attr-object-data" title="attr-object-data"><code>data</code></dfn>
391: attribute, if present, specifies the address of the resource. If
392: present, the attribute must be a <a href="urls.html#valid-non-empty-url-potentially-surrounded-by-spaces">valid non-empty
393: URL potentially surrounded by spaces</a>.</p><p class="warning">Authors who reference resources from other <a href="origin-0.html#origin" title="origin">origins</a> that they do not trust are urged to
394: use the <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code>
395: attribute defined below. Without that attribute, it is possible in
396: certain cases for an attacker on the remote host to use the plugin
397: mechanism to run arbitrary scripts, even if the author has used
398: features such as the Flash "allowScriptAccess" parameter.</p><p>The <dfn id="attr-object-type" title="attr-object-type"><code>type</code></dfn>
399: attribute, if present, specifies the type of the resource. If
400: present, the attribute must be a <a href="infrastructure.html#valid-mime-type">valid MIME type</a>.</p><p>At least one of either the <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute or the <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute must be present.</p><p>The <dfn id="attr-object-typemustmatch" title="attr-object-typemustmatch"><code>typemustmatch</code></dfn>
401: attribute is a <a href="common-microsyntaxes.html#boolean-attribute">boolean attribute</a> whose presence
402: indicates that the resource specified by the <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute is only to be used if
403: the value of the <code title="attr-object-type"><a href="#attr-object-type">type</a></code>
404: attribute and the <a href="urls.html#content-type">Content-Type</a> of the aforementioned
405: resource match.</p><p>The <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code>
406: attribute must not be specified unless both the <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute and the <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute are present.</p><p>The <dfn id="attr-object-name" title="attr-object-name"><code>name</code></dfn>
407: attribute, if present, must be a <a href="browsers.html#valid-browsing-context-name">valid browsing context
408: name</a>. The given value is used to name the <a href="browsers.html#nested-browsing-context">nested
409: browsing context</a>, if applicable.</p><div class="impl">
410:
411: <p>When the element is created, when it is popped off the
412: <a href="parsing.html#stack-of-open-elements">stack of open elements</a> of an <a href="parsing.html#html-parser">HTML parser</a>
413: or <a href="the-xhtml-syntax.html#xml-parser">XML parser</a>, and subsequently whenever the element is
414: <a href="infrastructure.html#insert-an-element-into-a-document" title="insert an element into a document">inserted into a
415: document</a> or <a href="infrastructure.html#remove-an-element-from-a-document" title="remove an element from a
416: document">removed from a document</a>; and whenever the element's
417: <code><a href="dom.html#document">Document</a></code> changes whether it is <a href="browsers.html#fully-active">fully
418: active</a>; and whenever an ancestor <code><a href="#the-object-element">object</a></code> element
419: changes to or from showing its <a href="content-models.html#fallback-content">fallback content</a>; and
420: whenever the element's <code title="attr-object-classid"><a href="obsolete.html#attr-object-classid">classid</a></code> attribute is set,
421: changed, or removed; and, when its <code title="attr-object-classid"><a href="obsolete.html#attr-object-classid">classid</a></code> attribute is not present,
422: whenever its <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute is
423: set, changed, or removed; and, when neither its <code title="attr-object-classid"><a href="obsolete.html#attr-object-classid">classid</a></code> attribute nor its <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute are present, whenever
424: its <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute is set,
425: changed, or removed: the user agent must <a href="webappapis.html#queue-a-task">queue a task</a>
426: to run the following steps to (re)determine what the
427: <code><a href="#the-object-element">object</a></code> element represents. The <a href="webappapis.html#task-source">task source</a>
428: for this <a href="webappapis.html#concept-task" title="concept-task">task</a> is the <a href="webappapis.html#dom-manipulation-task-source">DOM
429: manipulation task source</a>.</p>
1.4 mike 430:
1.1 mike 431: <ol><li>
432:
433: <p>If the user has indicated a preference that this
434: <code><a href="#the-object-element">object</a></code> element's <a href="content-models.html#fallback-content">fallback content</a> be
435: shown instead of the element's usual behavior, then jump to the
436: last step in the overall set of steps (fallback).</p>
437:
438: <p class="note">For example, a user could ask for the element's
439: <a href="content-models.html#fallback-content">fallback content</a> to be shown because that content
440: uses a format that the user finds more accessible.</p>
441:
442: </li>
443:
444: <li>
445:
446: <p>If the element has an ancestor <a href="media-elements.html#media-element">media element</a>, or
447: has an ancestor <code><a href="#the-object-element">object</a></code> element that is <em>not</em>
448: showing its <a href="content-models.html#fallback-content">fallback content</a>, or if the element is
449: not <a href="infrastructure.html#in-a-document" title="in a document">in a <code>Document</code></a>
450: with a <a href="browsers.html#browsing-context">browsing context</a>, or if the element's
451: <code><a href="dom.html#document">Document</a></code> is not <a href="browsers.html#fully-active">fully active</a>, or if the
452: element is still in the <a href="parsing.html#stack-of-open-elements">stack of open elements</a> of an
453: <a href="parsing.html#html-parser">HTML parser</a> or <a href="the-xhtml-syntax.html#xml-parser">XML parser</a>, then jump to
454: the last step in the overall set of steps (fallback).</p>
455:
456: </li>
457:
458: <li>
459:
460:
1.4 mike 461:
1.1 mike 462: <p>If the <code title="attr-object-classid"><a href="obsolete.html#attr-object-classid">classid</a></code>
463: attribute is present, and has a value that isn't the empty string,
464: then: if the user agent can find a <a href="infrastructure.html#plugin">plugin</a> suitable
465: according to the value of the <code title="attr-object-classid"><a href="obsolete.html#attr-object-classid">classid</a></code> attribute, and either
466: <a href="#sandboxPluginObject">plugins aren't being sandboxed</a>
467: or that <a href="infrastructure.html#plugin">plugin</a> can be <a href="infrastructure.html#concept-plugin-secure" title="concept-plugin-secure">secured</a>, then that
468: <a href="infrastructure.html#plugin">plugin</a> <a href="#object-plugin">should be used</a>,
469: and the value of the <code title="attr-object-data"><a href="#attr-object-data">data</a></code>
470: attribute, if any, should be passed to the <a href="infrastructure.html#plugin">plugin</a>. If
471: no suitable <a href="infrastructure.html#plugin">plugin</a> can be found, or if the
472: <a href="infrastructure.html#plugin">plugin</a> reports an error, jump to the last step in the
473: overall set of steps (fallback).</p>
474:
475:
1.4 mike 476:
1.1 mike 477: </li>
478:
479:
1.4 mike 480:
1.1 mike 481: <li><p>If the <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute
482: is present and its value is not the empty string, then:</p>
483:
484: <ol><li><p>If the <code title="attr-object-type"><a href="#attr-object-type">type</a></code>
485: attribute is present and its value is not a type that the user
486: agent supports, and is not a type that the user agent can find a
487: <a href="infrastructure.html#plugin">plugin</a> for, then the user agent may jump to the last
488: step in the overall set of steps (fallback) without fetching the
489: content to examine its real type.</p></li>
490:
491: <li><p><a href="urls.html#resolve-a-url" title="resolve a url">Resolve</a> the
492: <a href="urls.html#url">URL</a> specified by the <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute, relative to the
493: element.</p></li>
494:
495: <li><p>If that failed, <a href="webappapis.html#fire-a-simple-event">fire a simple event</a> named
496: <code title="event-error">error</code> at the element, then jump
497: to the last step in the overall set of steps (fallback).</p></li>
498:
499: <li>
500:
501: <p><a href="urls.html#fetch">Fetch</a> the resulting <a href="urls.html#absolute-url">absolute URL</a>,
502: from the element's <a href="browsers.html#browsing-context-scope-origin">browsing context scope origin</a> if
503: it has one.</p>
504:
505: <p>Fetching the resource
506: must <a href="the-end.html#delay-the-load-event">delay the load event</a> of the element's document
507: until the <a href="webappapis.html#concept-task" title="concept-task">task</a> that is <a href="webappapis.html#queue-a-task" title="queue a task">queued</a> by the <a href="webappapis.html#networking-task-source">networking task
508: source</a> once the resource has been <a href="urls.html#fetch" title="fetch">fetched</a> (defined next) has been run.</p>
509:
510: <p>For the purposes of the <a href="offline.html#application-cache">application cache</a>
511: networking model, this <a href="urls.html#fetch">fetch</a> operation is not for a
512: <a href="browsers.html#child-browsing-context">child browsing context</a> (though it might end up
513: being used for one after all, as defined below).</p>
514:
515: </li>
516:
517: <li><p>If the resource is not yet available (e.g. because the
518: resource was not available in the cache, so that loading the
519: resource required making a request over the network), then jump
520: to the last step in the overall set of steps (fallback). The
521: <a href="webappapis.html#concept-task" title="concept-task">task</a> that is <a href="webappapis.html#queue-a-task" title="queue
522: a task">queued</a> by the <a href="webappapis.html#networking-task-source">networking task source</a>
523: once the resource is available must restart this algorithm from
524: this step. Resources can load incrementally; user agents may opt
525: to consider a resource "available" whenever enough data has been
526: obtained to begin processing the resource.</p></li>
527:
528: <li><p>If the load failed (e.g. there was an HTTP 404 error,
529: there was a DNS error), <a href="webappapis.html#fire-a-simple-event">fire a simple event</a> named
530: <code title="event-error">error</code> at the element, then jump
531: to the last step in the overall set of steps (fallback).</p></li>
532:
533: <li id="object-type-detection">
534:
535: <p>Determine the <var title="">resource type</var>, as follows:</p>
536:
537:
1.4 mike 538:
1.1 mike 539: <ol><li>
540:
541: <p>Let the <var title="">resource type</var> be unknown.</p>
542:
543: </li>
544:
545: <li>
546:
547: <p>If the <code><a href="#the-object-element">object</a></code> element has a <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute and a <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code>
548: attribute, and the resource has <a href="urls.html#content-type" title="Content-Type">associated Content-Type metadata</a>,
549: and the type specified in <a href="urls.html#content-type" title="Content-Type">the
550: resource's Content-Type metadata</a> is an <a href="infrastructure.html#ascii-case-insensitive">ASCII
551: case-insensitive</a> match for the value of the element's
552: <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute, then let
553: <var title="">resource type</var> be that type and jump to the
554: step below labeled <i>handler</i>.</p>
555:
556:
1.4 mike 557:
1.1 mike 558: </li>
559:
560: <li>
561:
562: <p>If the <code><a href="#the-object-element">object</a></code> element has a <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code>
563: attribute, jump to the step below labeled <i>handler</i>.</p>
564:
565: </li>
566:
567: <li>
568:
569:
570:
571: <p>If the user agent is configured to strictly obey
572: Content-Type headers for this resource, and the resource has
573: <a href="urls.html#content-type" title="Content-Type">associated Content-Type
574: metadata</a>, then let the <var title="">resource
575: type</var> be the type specified in <a href="urls.html#content-type" title="Content-Type">the resource's Content-Type
576: metadata</a>, and jump to the step below labeled
577: <i>handler</i>.</p>
578:
579: <p class="warning">This can introduce a vulnerability, wherein
580: a site is trying to embed a resource that uses a particular
581: plugin, but the remote site overrides that and instead
582: furnishes the user agent with a resource that triggers a
583: different plugin with different security characteristics. </p>
584:
585: </li>
586:
587: <li>
588:
589: <p>If there is a <code title="attr-object-type"><a href="#attr-object-type">type</a></code>
590: attribute present on the <code><a href="#the-object-element">object</a></code> element, and that
591: attribute's value is not a type that the user agent supports,
592: but it <em>is</em> a type that a <a href="infrastructure.html#plugin">plugin</a> supports,
593: then let the <var title="">resource type</var> be the type
594: specified in that <code title="attr-object-type"><a href="#attr-object-type">type</a></code>
595: attribute, and jump to the step below labeled
596: <i>handler</i>.</p>
597:
598: </li>
599:
600: <li>
601:
602: <p>Run the approprate set of steps from the following
603: list:</p>
604:
605: <dl class="switch"><dt>The resource has <a href="urls.html#content-type" title="Content-Type">associated
606: Content-Type metadata</a></dt>
607:
608: <dd>
609:
610: <ol><li>
611:
612: <p>Let <var title="">binary</var> be false.</p>
613:
614: </li>
615:
616: <li>
617:
618: <p>If the type specified in <a href="urls.html#content-type" title="Content-Type">the
619: resource's Content-Type metadata</a> is
620: "<code>text/plain</code>", and the result of applying the
621: <a href="urls.html#content-type-sniffing:-text-or-binary" title="Content-Type sniffing: text or binary">rules
622: for distinguishing if a resource is text or binary</a>
623: to the resource is that the resource is not
624: <code>text/plain</code>, then set <var title="">binary</var> to true.</p>
625:
626: </li>
627:
628: <li>
629:
630: <p>If the type specified in <a href="urls.html#content-type" title="Content-Type">the
631: resource's Content-Type metadata</a> is
632: "<code>application/octet-stream</code>", then set <var title="">binary</var> to true.</p>
633:
634: </li>
635:
636: <li>
637:
638: <p>If <var title="">binary</var> is false, then let the
639: <var title="">resource type</var> be the type specified in
640: <a href="urls.html#content-type" title="Content-Type">the resource's Content-Type
641: metadata</a>, and jump to the step below labeled
642: <i>handler</i>.</p>
643:
644: </li>
645:
646: <li>
647:
648: <p>If there is a <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute present on
649: the <code><a href="#the-object-element">object</a></code> element, and its value is not
650: <code>application/octet-stream</code>, then run the
651: following steps:</p>
652:
653: <ol><li>
654:
655: <p>If the attribute's value is a type that a <a href="infrastructure.html#plugin">plugin</a> supports, or
656: the attribute's value is a type that starts with "<code>image/</code>" that is not also an <a href="infrastructure.html#xml-mime-type">XML MIME type</a>,
657: then let the <var title="">resource type</var> be the type specified in that <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute.</p>
658:
659: </li>
660:
661: <li>
662:
663: <p>Jump to the step below labeled <i>handler</i>.</p>
664:
665: </li>
666:
667: </ol></li>
668:
669: </ol></dd>
670:
671: <dt>The resource does not have <a href="urls.html#content-type" title="Content-Type">associated Content-Type
672: metadata</a></dt>
673:
674: <dd>
675:
676: <ol><li>
677:
678: <p>If there is a <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute present on
679: the <code><a href="#the-object-element">object</a></code> element, then let the <var title="">tentative type</var> be the type specified in that
680: <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute.</p>
681:
682: <p>Otherwise, let <var title="">tentative type</var> be the
683: <a href="urls.html#content-type-sniffing-0" title="content-type sniffing">sniffed type of the
684: resource</a>.</p>
685:
686: </li>
687:
688: <li>
689:
690: <p>If <var title="">tentative type</var> is <em>not</em>
691: <code>application/octet-stream</code>, then let <var title="">resource type</var> be <var title="">tentative
692: type</var> and jump to the step below labeled
693: <i>handler</i>.</p>
694:
695: </li>
696:
697: </ol></dd>
698:
699: </dl></li>
700:
701: <li>
702:
703:
1.4 mike 704:
1.1 mike 705: <p>If the <a href="urls.html#url-path" title="url-path"><path></a> component
706: of the <a href="urls.html#url">URL</a> of the specified resource (after any
707: redirects) matches a pattern that a <a href="infrastructure.html#plugin">plugin</a>
708: supports, then let <var title="">resource type</var> be the
709: type that that plugin can handle.</p>
710:
711: <p class="example">For example, a plugin might say that it can
712: handle resources with <a href="urls.html#url-path" title="url-path"><path></a> components that end with
713: the four character string "<code title="">.swf</code>".</p>
714:
715:
716:
717:
718: </li>
719:
720: </ol><p class="note">It is possible for this step to finish, or for
721: one of the substeps above to jump straight to the next step,
722: with <var title="">resource type</var> still being unknown. In
723: both cases, the next step will trigger fallback.</p>
724:
725: </li>
726:
727: <li><p><i>Handler</i>: Handle the content as given by the first
728: of the following cases that matches:</p>
729:
730: <dl class="switch"><dt>If the <var title="">resource type</var> is not a type that
731: the user agent supports, but it <em>is</em> a type that a
732: <a href="infrastructure.html#plugin">plugin</a> supports</dt>
733:
734: <dd>
735:
736: <p>If <a href="#sandboxPluginObject">plugins are being
737: sandboxed</a> and the plugin that supports <var title="">resource type</var> cannot be <a href="infrastructure.html#concept-plugin-secure" title="concept-plugin-secure">secured</a>, jump to the last
738: step in the overall set of steps (fallback).</p>
739:
740: <p>Otherwise, the user agent should <a href="#object-plugin">use the plugin that supports <var title="">resource type</var></a> and pass the content of the
741: resource to that <a href="infrastructure.html#plugin">plugin</a>. If the
742: <a href="infrastructure.html#plugin">plugin</a> reports an error, then jump to the last
743: step in the overall set of steps (fallback).</p>
744:
745: </dd>
746:
747:
748: <dt>If the <var title="">resource type</var> is an <a href="infrastructure.html#xml-mime-type">XML MIME
749: type</a>, or
750:
751: if the <var title="">resource type</var> does not start with
752: "<code>image/</code>"</dt>
753:
754: <dd>
755:
756: <p>The <code><a href="#the-object-element">object</a></code> element must be associated with a
757: newly created <a href="browsers.html#nested-browsing-context">nested browsing context</a>, if it does
758: not already have one.</p>
759:
760: <p>If the <a href="urls.html#url">URL</a> of the given resource is not
761: <code><a href="urls.html#about:blank">about:blank</a></code>, the element's <a href="browsers.html#nested-browsing-context">nested browsing
762: context</a> must then be <a href="history.html#navigate" title="navigate">navigated</a> to that
763: resource, with <a href="history.html#replacement-enabled">replacement enabled</a>, and with the
764: <code><a href="#the-object-element">object</a></code> element's document's <a href="browsers.html#browsing-context">browsing
765: context</a> as the <a href="history.html#source-browsing-context">source browsing context</a>.
766: (The <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute of
767: the <code><a href="#the-object-element">object</a></code> element doesn't get updated if the
768: browsing context gets further navigated to other
769: locations.)</p>
770:
771: <p>If the <a href="urls.html#url">URL</a> of the given resource <em>is</em>
772: <code><a href="urls.html#about:blank">about:blank</a></code>, then, instead, the user agent must
773: <a href="webappapis.html#queue-a-task">queue a task</a> to <a href="webappapis.html#fire-a-simple-event">fire a simple event</a>
774: named <code title="event-load">load</code> at the
775: <code><a href="#the-object-element">object</a></code> element. <span class="note">No <code title="event-load">load</code> event is fired at the
776: <code><a href="urls.html#about:blank">about:blank</a></code> document itself.</span></p>
777:
778: <p>The <code><a href="#the-object-element">object</a></code> element <a href="rendering.html#represents">represents</a> the
779: <a href="browsers.html#nested-browsing-context">nested browsing context</a>.</p>
780:
781: <p>If the <code title="attr-object-name"><a href="#attr-object-name">name</a></code> attribute
782: is present, the <a href="browsers.html#browsing-context-name">browsing context name</a> must be set
783: to the value of this attribute; otherwise, the <a href="browsers.html#browsing-context-name">browsing
784: context name</a> must be set to the empty string.</p>
785:
786: <p class="note">In certain situations, e.g. if the resource
787: was <a href="urls.html#fetch" title="fetch">fetched</a> from an
788: <a href="offline.html#application-cache">application cache</a> but it is an HTML file with a
789: <code title="attr-html-manifest"><a href="the-html-element.html#attr-html-manifest">manifest</a></code> attribute
790: that points to a different <a href="offline.html#concept-appcache-manifest" title="concept-appcache-manifest">application cache
791: manifest</a>, the <a href="history.html#navigate" title="navigate">navigation</a>
792: of the <a href="browsers.html#browsing-context">browsing context</a> will be restarted so as
793: to load the resource afresh from the network or a different
794: <a href="offline.html#application-cache">application cache</a>. Even if the resource is then
795: found to have a different type, it is still used as part of a
796: <a href="browsers.html#nested-browsing-context">nested browsing context</a>: only the
797: <a href="history.html#navigate">navigate</a> algorithm is restarted, not this
798: <code><a href="#the-object-element">object</a></code> algorithm.</p>
799:
800:
801:
802: </dd>
803:
804:
805: <dt>If the <var title="">resource type</var> starts with
806: "<code>image/</code>", and support for images has not been
807: disabled</dt>
808:
809: <dd>
810:
811: <p>Apply the <a href="urls.html#content-type-sniffing:-image" title="content-type sniffing: image">image
812: sniffing</a> rules to determine the type of the image.</p>
813:
814: <p>The <code><a href="#the-object-element">object</a></code> element <a href="rendering.html#represents">represents</a> the
815: specified image. The image is not a <a href="browsers.html#nested-browsing-context">nested browsing
816: context</a>.</p>
817:
818: <p>If the image cannot be rendered, e.g. because it is
819: malformed or in an unsupported format, jump to the last step
820: in the overall set of steps (fallback).</p>
821:
822: </dd>
823:
824:
825: <dt>Otherwise</dt>
826:
827: <dd>
828:
829: <p>The given <var title="">resource type</var> is not
830: supported. Jump to the last step in the overall set of steps
831: (fallback).</p>
832:
833: <p class="note">If the previous step ended with the <var title="">resource type</var> being unknown, this is the case
834: that is triggered.</p>
835:
836: </dd>
837:
838: </dl></li>
839:
840: <li><p>The element's contents are not part of what the
841: <code><a href="#the-object-element">object</a></code> element represents.</p>
842:
843: </li><li>
844:
845: <p>Once the resource is completely loaded, <a href="webappapis.html#queue-a-task">queue a
846: task</a> to <a href="webappapis.html#fire-a-simple-event">fire a simple event</a> named <code title="event-load">load</code> at the element.</p>
847:
848: <p>The <a href="webappapis.html#task-source">task source</a> for this task is the <a href="webappapis.html#dom-manipulation-task-source">DOM manipulation task
849: source</a>.</p>
850:
851: </li>
852:
853: </ol></li>
854:
855: <li><p>If the <code title="attr-object-data"><a href="#attr-object-data">data</a></code> attribute
856: is absent but the <code title="attr-object-type"><a href="#attr-object-type">type</a></code>
857: attribute is present, and the user agent can find a
858: <a href="infrastructure.html#plugin">plugin</a> suitable according to the value of the <code title="attr-object-type"><a href="#attr-object-type">type</a></code> attribute, and either <a href="#sandboxPluginObject">plugins aren't being sandboxed</a> or
859: the <a href="infrastructure.html#plugin">plugin</a> can be <a href="infrastructure.html#concept-plugin-secure" title="concept-plugin-secure">secured</a>, then that
860: <a href="infrastructure.html#plugin">plugin</a> <a href="#object-plugin">should be used</a>. If
861: these conditions cannot be met, or if the <a href="infrastructure.html#plugin">plugin</a>
862: reports an error, jump to the next step (fallback).</p></li>
863:
864: <li><p>(Fallback.) The <code><a href="#the-object-element">object</a></code> element
865: <a href="rendering.html#represents">represents</a> the element's children, ignoring any
866: leading <code><a href="the-param-element.html#the-param-element">param</a></code> element children. This is the element's
867: <a href="content-models.html#fallback-content">fallback content</a>. If the element has an instantiated
868: <a href="infrastructure.html#plugin">plugin</a>, then unload it.</p></li>
869:
870: </ol><p id="object-plugin">When the algorithm above instantiates a
871: <a href="infrastructure.html#plugin">plugin</a>, the user agent should pass to the
872: <a href="infrastructure.html#plugin">plugin</a> used the names and values of all the attributes
873: on the element, in the order they were added to the element, with
874: the attributes added by the parser being ordered in source order,
875: followed by a parameter named "PARAM" whose value is null,
876: followed by all the names and values of <a href="the-param-element.html#concept-param-parameter" title="concept-param-parameter">parameters</a> given by
877: <code><a href="the-param-element.html#the-param-element">param</a></code> elements that are children of the
878: <code><a href="#the-object-element">object</a></code> element, in <a href="infrastructure.html#tree-order">tree order</a>. If the
879: <a href="infrastructure.html#plugin">plugin</a> supports a scriptable interface, the
880: <code><a href="#htmlobjectelement">HTMLObjectElement</a></code> object representing the element
881: should expose that interface. The <code><a href="#the-object-element">object</a></code> element
882: <a href="rendering.html#represents">represents</a> the <a href="infrastructure.html#plugin">plugin</a>. The
883: <a href="infrastructure.html#plugin">plugin</a> is not a nested <a href="browsers.html#browsing-context">browsing
884: context</a>.</p>
885:
886: <p id="sandboxPluginObject">Plugins are considered sandboxed for the
887: purpose of an <code><a href="#the-object-element">object</a></code> element if the <a href="the-iframe-element.html#sandboxed-plugins-browsing-context-flag">sandboxed
888: plugins browsing context flag</a> was set on the
889: <code><a href="#the-object-element">object</a></code> element's <code><a href="dom.html#document">Document</a></code>'s <a href="browsers.html#browsing-context">browsing
890: context</a> when the <code><a href="dom.html#document">Document</a></code> was created.</p>
891:
892: <p class="note">The above algorithm is independent of CSS properties
893: (including 'display', 'overflow', and 'visibility'). For example, it
894: runs even if the element is hidden with a 'display:none' CSS style,
895: and does not run <em>again</em> if the element's visibility
896: changes.</p>
897:
898: <p>Due to the algorithm above, the contents of <code><a href="#the-object-element">object</a></code>
899: elements act as <a href="content-models.html#fallback-content">fallback content</a>, used only when
900: referenced resources can't be shown (e.g. because it returned a 404
901: error). This allows multiple <code><a href="#the-object-element">object</a></code> elements to be
902: nested inside each other, targeting multiple user agents with
903: different capabilities, with the user agent picking the first one it
904: supports.</p>
905:
906: <p>Whenever the <code title="attr-object-name"><a href="#attr-object-name">name</a></code> attribute
907: is set, if the <code><a href="#the-object-element">object</a></code> element has a nested
908: <a href="browsers.html#browsing-context">browsing context</a>, its <a href="browsers.html#browsing-context-name" title="browsing context
909: name">name</a> must be changed to the new value. If the attribute
910: is removed, if the <code><a href="#the-object-element">object</a></code> element has a <a href="browsers.html#browsing-context">browsing
911: context</a>, the <a href="browsers.html#browsing-context-name">browsing context name</a> must be set
912: to the empty string.</p>
913:
914: </div><p>The <code title="attr-hyperlink-usemap"><a href="image-maps.html#attr-hyperlink-usemap">usemap</a></code> attribute,
915: if present while the <code><a href="#the-object-element">object</a></code> element represents an
916: image, can indicate that the object has an associated <a href="image-maps.html#image-map">image
917: map</a>. <span class="impl">The attribute must be ignored if the
918: <code><a href="#the-object-element">object</a></code> element doesn't represent an image.</span></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
919: explicitly associate the <code><a href="#the-object-element">object</a></code> element with its
920: <a href="association-of-controls-and-forms.html#form-owner">form owner</a>.</p><div class="impl">
921:
922: <p><strong>Constraint validation</strong>: <code><a href="#the-object-element">object</a></code>
923: elements are always <a href="constraints.html#barred-from-constraint-validation">barred from constraint
924: validation</a>.</p>
925:
926: </div><p>The <code><a href="#the-object-element">object</a></code> element supports <a href="dimension-attributes.html#dimension-attributes">dimension
927: attributes</a>.</p><div class="impl">
928:
929: <p>The IDL attributes <dfn id="dom-object-data" title="dom-object-data"><code>data</code></dfn>, <dfn id="dom-object-type" title="dom-object-type"><code>type</code></dfn> and <dfn id="dom-object-name" title="dom-object-name"><code>name</code></dfn> each must
930: <a href="common-dom-interfaces.html#reflect">reflect</a> the respective content attributes of the same
931: name. The <dfn id="dom-object-typemustmatch" title="dom-object-typeMustMatch"><code>typeMustMatch</code></dfn>
932: IDL attribute must <a href="common-dom-interfaces.html#reflect">reflect</a> the <code title="attr-object-typemustmatch"><a href="#attr-object-typemustmatch">typemustmatch</a></code> content
933: attribute. The <dfn id="dom-object-usemap" title="dom-object-useMap"><code>useMap</code></dfn> IDL attribute
934: must <a href="common-dom-interfaces.html#reflect">reflect</a> the <code title="attr-object-usemap">usemap</code> content attribute.</p>
935:
936: <p>The <dfn id="dom-object-contentdocument" title="dom-object-contentDocument"><code>contentDocument</code></dfn>
937: IDL attribute must return the <code><a href="dom.html#document">Document</a></code> object of the
938: <a href="browsers.html#active-document">active document</a> of the <code><a href="#the-object-element">object</a></code> element's
939: <a href="browsers.html#nested-browsing-context">nested browsing context</a>, if it has one; otherwise, it
940: must return null.</p>
941:
942: <p>The <dfn id="dom-object-contentwindow" title="dom-object-contentWindow"><code>contentWindow</code></dfn>
943: IDL attribute must return the <code><a href="browsers.html#windowproxy">WindowProxy</a></code> object of the
944: <code><a href="#the-object-element">object</a></code> element's <a href="browsers.html#nested-browsing-context">nested browsing context</a>,
945: if it has one; otherwise, it must return null.</p>
946:
947: <p>The <code title="dom-cva-willValidate"><a href="constraints.html#dom-cva-willvalidate">willValidate</a></code>, <code title="dom-cva-validity"><a href="constraints.html#dom-cva-validity">validity</a></code>, and <code title="dom-cva-validationMessage"><a href="constraints.html#dom-cva-validationmessage">validationMessage</a></code>
948: attributes, and the <code title="dom-cva-checkValidatity"><a href="constraints.html#dom-cva-checkvalidatity">checkValidity()</a></code> and <code title="dom-cva-setCustomValidity"><a href="constraints.html#dom-cva-setcustomvalidity">setCustomValidity()</a></code>
949: methods, are part of the <a href="constraints.html#the-constraint-validation-api">constraint validation API</a>. The
950: <code title="dom-fae-form"><a href="association-of-controls-and-forms.html#dom-fae-form">form</a></code> IDL attribute is part of the
951: element's forms API.</p>
952:
1.34 mike 953: <p>All <code><a href="#the-object-element">object</a></code> elements have a <dfn id="dom-object-caller" title="dom-object-caller">legacy caller operation</dfn>. If the
954: <code><a href="#the-object-element">object</a></code> element has an instantiated <a href="infrastructure.html#plugin">plugin</a>
955: that supports a scriptable interface that defines a legacy caller
956: operation, then that must be the behavior of the object's legacy
957: caller operation. Otherwise, the object's legacy caller operation
958: must be to throw a <code><a href="infrastructure.html#notsupportederror">NotSupportedError</a></code> exception.</p>
959:
1.1 mike 960: </div><div class="example">
961:
962: <p>In the following example, a Java applet is embedded in a page
963: using the <code><a href="#the-object-element">object</a></code> element. (Generally speaking, it is
964: better to avoid using applets like these and instead use native
965: JavaScript and HTML to provide the functionality, since that way
966: the application will work on all Web browsers without requiring a
967: third-party plugin. Many devices, especially embedded devices, do
968: not support third-party technologies like Java.)</p>
969:
970: <pre><figure>
971: <object type="application/x-java-applet">
972: <param name="code" value="MyJavaClass">
973: <p>You do not have Java available, or it is disabled.</p>
974: </object>
975: <figcaption>My Java Clock</figcaption>
976: </figure></pre>
977:
978: </div><div class="example">
979:
980: <p>In this example, an HTML page is embedded in another using the
981: <code><a href="#the-object-element">object</a></code> element.</p>
982:
983: <pre><figure>
984: <object data="clock.html"></object>
985: <figcaption>My HTML Clock</figcaption>
986: </figure></pre>
987:
988: </div><div class="example">
989:
990: <p>The following example shows how a plugin can be used in HTML (in
991: this case the Flash plugin, to show a video file). Fallback is
992: provided for users who do not have Flash enabled, in this case
993: using the <code><a href="the-video-element.html#the-video-element">video</a></code> element to show the video for those
994: using user agents that support <code><a href="the-video-element.html#the-video-element">video</a></code>, and finally
995: providing a link to the video for those who have neither Flash nor
996: a <code><a href="the-video-element.html#the-video-element">video</a></code>-capable browser.</p>
997:
998: <pre><p>Look at my video:
999: <object type="application/x-shockwave-flash">
1000: <param name=movie value="http://video.example.com/library/watch.swf">
1001: <param name=allowfullscreen value=true>
1002: <param name=flashvars value="http://video.example.com/vids/315981">
1003: <video controls src="http://video.example.com/vids/315981">
1004: <a href="http://video.example.com/vids/315981">View video</a>.
1005: </video>
1006: </object>
1007: </p></pre>
1008:
1009: </div></body></html>
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