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Define what tabIndex returns when the tabindex attribute is not set #4754

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merged 6 commits into from
Jul 9, 2019
Merged

Define what tabIndex returns when the tabindex attribute is not set #4754

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6331e77
Define what tabIndex returns when the tabindex attribute is not set
rakina Jul 5, 2019
4221ce8
Keep saying "default value"
domenic Jul 8, 2019
918e937
Entity reference
domenic Jul 9, 2019
e6c5a59
Add option/optgroup (all browsers have this), and alphabetize
domenic Jul 9, 2019
c0ab288
Add note
domenic Jul 9, 2019
a2a46e3
Not option or optgroup, oops. Yes summary, in some cases. Ugh.
domenic Jul 9, 2019
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Expand Up @@ -57285,18 +57285,30 @@ interface <dfn>HTMLDetailsElement</dfn> : <span>HTMLElement</span> {

<div w-nodev>

<p>The <span>activation behavior</span> of <code>summary</code> elements is to run the following
steps:</p>
<p>A <code>summary</code> element is a <dfn>summary for its parent details</dfn> if the following
algorithm returns true:</p>

<ol>
<li><p>If this <code>summary</code> element has no parent node, then return.</p></li>
<li><p>If this <code>summary</code> element has no parent, then return false.</p></li>

<li><p>Let <var>parent</var> be this <code>summary</code> element's parent node.</p>
<li><p>Let <var>parent</var> be this <code>summary</code> element's parent.</p></li>

<li><p>If <var>parent</var> is not a <code>details</code> element, then return.</p>
<li><p>If <var>parent</var> is not a <code>details</code> element, then return false.</p></li>

<li><p>If <var>parent</var>'s first <code>summary</code> element child is not this
<code>summary</code> element, then return.</p></li>
<code>summary</code> element, then return false.</p></li>

<li><p>Return true.</p></li>
</ol>

<p>The <span>activation behavior</span> of <code>summary</code> elements is to run the following
steps:</p>

<ol>
<li><p>If this <code>summary</code> element is not the <span>summary for its parent
details</span>, then return.</p></li>

<li><p>Let <var>parent</var> be this <code>summary</code> element's parent.</p></li>

<li>
<p>If the <code data-x="attr-details-open">open</code> attribute is present on
Expand Down Expand Up @@ -73709,8 +73721,12 @@ END:VCARD</pre>

<p>The <dfn><code data-x="dom-tabIndex">tabIndex</code></dfn> IDL attribute must
<span>reflect</span> the value of the <code data-x="attr-tabindex">tabindex</code> content
attribute. Its default value is 0 for elements that are focusable and &#x2212;1 for elements that
are not focusable.</p>
attribute. The default value is 0 if the element is an <code>a</code>, <code>area</code>,
<code>button</code>, <code>iframe</code>, <code>input</code>, <code>select</code>, or
<code>textarea</code> element, or is a <code>summary</code> element that is a <span>summary for
its parent details</span>. The default value is &#x2212;1 otherwise.</p>

<p class="note">The varying default value based on element type is a historical artifact.</p>

</div>

Expand Down