<li><code><a href=#the-command>command</a></code> elements that do not have a <code title=attr-command-disabled><a href=#attr-command-disabled>disabled</a></code> attribute</li>
<li>any other element, if it is <a href=#focusable>focusable</a></li>
<li>any other element, if it is <a href=#specially-focusable>specially
focusable</a></li>
</ul>
first such element's <a href=#command-facet-disabledstate title=command-facet-disabledstate>Disabled State</a> facet
is false (not disabled)</li>
<li>any other element, if it is <a href=#focusable>focusable</a></li>
<li>any other element, if it is <a href=#specially-focusable>specially
focusable</a></li>
</ul>
</dl>
<p>An element is <dfn id=focusable>focusable</dfn> if the <code title=attr-tabindex><a href=#attr-tabindex>tabindex</a></code> attribute's definition above
defines the element to be focusable <em>and</em> the element is
<span>being rendered</span><!-- XXX xref, define display:none as not
being rendered, off-screen as being rendered? -->.</p>
<p>An element is <dfn id=specially-focusable>specially focusable</dfn> if the <code title=attr-tabindex><a href=#attr-tabindex>tabindex</a></code> attribute's definition above
defines the element to be focusable.</p>
<p>An element that is <a href=#focusable>focusable</a> but does not otherwise
have an <a href=#activation-behavior>activation behavior</a> defined has an
<p>An element that is <a href=#specially-focusable>specially focusable</a> but does not
otherwise have an <a href=#activation-behavior>activation behavior</a> defined has an
<a href=#activation-behavior>activation behavior</a> that does nothing.</p>
<p class=note>This means that an element that is only focusable
to a non-mouse activation (e.g. hitting the "enter" key while the
element is focused).</p>
<p>An element is <dfn id=focusable>focusable</dfn> if the user agent's default
behavior allows it to be focusable or if the element is
<a href=#specially-focusable>specially focusable</a>, but only if the element is
<li><code><a href=#the-a-element>a</a></code> elements that have an <code title=attr-hyperlink-href><a href=#attr-hyperlink-href>href</a></code> attribute</li>
<li class=XXX><code><a href=#the-area-element>area</a></code> elements that have an <code title=attr-hyperlink-href><a href=#attr-hyperlink-href>href</a></code> attribute</li> <!-- should
define the behavior in the face of multiple images and in the face
of no images -->
<li><code><a href=#the-link-element>link</a></code> elements that have an <code title=attr-link-href><a href=#attr-link-href>href</a></code> attribute</li>
<li><code><a href=#the-bb-element>bb</a></code> elements whose <code title=attr-bb-type><a href=#attr-bb-type>type</a></code> attribute is in a state whose
<i>relevance</i> is true</li>
<li><code><a href=#the-button-element>button</a></code> elements that are not <a href=#concept-fe-disabled title=concept-fe-disabled>disabled</a></li>
<li><code><a href=#the-input-element>input</a></code> elements whose <code title=attr-input-type><a href=#attr-input-type>type</a></code> attribute are not in the
<a href=#hidden-state title=attr-input-type-hidden>Hidden</a> state and that
are not <a href=#concept-fe-disabled title=concept-fe-disabled>disabled</a></li>
<li><code><a href=#the-select-element>select</a></code> elements that are not <a href=#concept-fe-disabled title=concept-fe-disabled>disabled</a></li>
<li><code><a href=#the-textarea-element>textarea</a></code> elements that are not <a href=#concept-fe-disabled title=concept-fe-disabled>disabled</a></li>
<li><code><a href=#the-command>command</a></code> elements that do not have a <code title=attr-command-disabled><a href=#attr-command-disabled>disabled</a></code> attribute</li>
</ul>
<p>The <dfn id=dom-tabindex title=dom-tabIndex><code>tabIndex</code></dfn> DOM
attribute must <a href=#reflect>reflect</a> the value of the <code title=attr-tabindex><a href=#attr-tabindex>tabindex</a></code> content attribute. If the
attribute is not present, or parsing its value returns an error,
</ol>
<p>User agents should run the <a href=#unfocusing-steps>unfocusing steps</a> for an
element whenever the user moves the focus away from any
<a href=#focusable>focusable</a> element.</p>
<p>When the user moves the focus away from a <a href=#focusable>focusable</a>
element, the user agent should run the <a href=#unfocusing-steps>unfocusing steps</a>
that element.</p>
<p>When an element that is focused stops being a
<a href=#focusable>focusable</a> element, the user agent should run the
<a href=#unfocusing-steps>unfocusing steps</a> that element.</p>
<p class=example>For example, this might happen because the
element is removed from its <code>Document</code>, or has a <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> attribute added. It would also
happen to an <code><a href=#the-input-element>input</a></code> element when the element gets <a href=#concept-fe-disabled title=concept-fe-disabled>disabled</a>.</p>
