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[cssom] Let getComputedStyle return an empty style for invalid pseudo-elements, and the element's style if the string doesn't begin with a colon. #6540

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Merged
merged 1 commit into from
Sep 18, 2021
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[cssom] Let getComputedStyle return an empty style for invalid pseudo-elements, and the element's style if the string doesn't begin with a colon. #6540

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7 changes: 4 additions & 3 deletions cssom-1/Overview.bs
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Original file line number Diff line number Diff line change
Expand Up @@ -2968,10 +2968,10 @@ steps:
<ol>
<li>Let <var>doc</var> be <var>elt</var>'s <a>node document</a>.
<li>Let <var>obj</var> be <var>elt</var>.
<li>If <var>pseudoElt</var> is provided, and it's not the empty string, then:
<li>If <var>pseudoElt</var> is provided, is not the empty string, and starts with a colon, then:
<ol>
<li>[=CSS/Parse=] <var>pseudoElt</var> as a <<pseudo-element-selector>>, and let <var>type</var> be the result.
<li>If <var>type</var> is failure, or is an ''::slotted()'' or ''::part()'' pseudo-element, <a>throw</a> a {{TypeError}} exception.
<li>If <var>type</var> is failure, or is an ''::slotted()'' or ''::part()'' pseudo-element, let <var>obj</var> be null.
<li>Otherwise let <var>obj</var> be the given pseudo-element of <var>elt</var>.
</ol>

Expand All @@ -2980,7 +2980,8 @@ steps:
match above.

<li>Let <var>decls</var> be an empty list of <a>CSS declarations</a>.
<li>If <var>elt</var> is <a>connected</a>, part of the <a>flat tree</a>,
<li>If <var>obj</var> is not null, and <var>elt</var> is <a>connected</a>,
part of the <a>flat tree</a>,
and its <a>shadow-including root</a> has a <a>browsing context</a> which either
doesn't have a <a>browsing context container</a>, or whose
<a>browsing context container</a> is <a>being rendered</a>,
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