Skip to content

[selectors] Single form for descendant combinator #2162

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Jan 4, 2018
Merged

[selectors] Single form for descendant combinator #2162

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
[selectors] Single form for descendant combinator 
CSS Selectors 4 previously allowed >> as an alternative
for whitespace. This has been removed.

resolves #641
  • Loading branch information
@ericwilligers
ericwilligers committed Jan 4, 2018
commit 9371f33dbf75a2eb8a570dbde1d0c27a5e7c82f4
24 changes: 7 additions & 17 deletions selectors-4/Overview.bs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -446,10 +446,10 @@ Selectors Overview</h2>
<td>3
<tbody>
<tr>
<td><code>E F</code> <em>or</em> <code>E >> F</code>
<td><code>E F</code>
<td>an F element descendant of an E element
<td>[[#descendant-combinators]]
<td>1 <em>or</em> 4
<td>1
<tr>
<td><code>E > F</code>
<td>an F element child of an E element
Expand Down Expand Up @@ -2964,19 +2964,16 @@ Typed Child-indexed Pseudo-classes</h3>
Combinators</h2>

<h3 id="descendant-combinators">
Descendant combinator (<code> </code>) <em>or</em> (<code>>></code>)</h3>
Descendant combinator (<code> </code>)</h3>

At times, authors may want selectors to describe an element that is
the descendant of another element in the document tree (e.g., "an
<a element>em</a> element that is contained within an <a element>H1</a> element").
The <dfn export>descendant combinator</dfn> expresses such a relationship.
It has two syntactic forms:
<ol>
<li><a href="#whitespace">whitespace</a> that separates two <a>compound selectors</a> <em>or</em>
<li>A doubled child selector (<dfn selector id=selectordef-descendant>>></dfn>)
</ol>

A selector of the form ''A B'' or ''A >> B''' represents an element <code>B</code> that is an
A descendant combinator is whitespace that separates two <a>compound selectors</a>.

A selector of the form ''A B'' represents an element <code>B</code> that is an
arbitrary descendant of some ancestor element <code>A</code>.

<div class="example">
Expand Down Expand Up @@ -3012,12 +3009,6 @@ Descendant combinator (<code> </code>) <em>or</em> (<code>>></code>)</h3>
<pre>div p *[href]</pre>
</div>

Note: Note that the whitespace form has existed since CSS Level 1,
whereas the <code>>></code> form is introduced in Level 4.
It was introduced to give the descendant combinator a visible, non-whitespace form
and to bridge the gap between the <a>child combinator</a> (<code>></code>)
and the shadow-piercing descendant combinator (<code>>>></code>) [[CSS-SCOPING-1]].

<h3 id="child-combinators">
Child combinator (<code>></code>)</h3>

Expand Down Expand Up @@ -3311,7 +3302,7 @@ Grammar</h2>
<dfn>&lt;simple-selector></dfn> = <<type-selector>> | <<subclass-selector>>


<dfn>&lt;combinator></dfn> = '>>' | '>' | '+' | '~' | [ '||' ]
<dfn>&lt;combinator></dfn> = '>' | '+' | '~' | [ '||' ]

<dfn>&lt;type-selector></dfn> = <<wq-name>> | <<ns-prefix>>? '*'

Expand Down Expand Up @@ -3720,7 +3711,6 @@ Changes</h2>
Significant changes since the <a href="https://www.w3.org/TR/2013/WD-selectors4-20130502/">2 May 2013 Working Draft</a> include:

<ul>
<li>Added the ''>>'' notation for the descendant selector.
<li>Added the '':target-within'', '':focus-within'', '':focus-visible'', '':playing'', and '':paused'' pseudo-classes.
<li>Added a zero-specificity '':matches()''-type pseudo-class, with name TBD.
<li>Replaced subject indicator (''!'') feature with '':has()''.
Expand Down