api.jquery.com/entries/empty-selector.xml at 1f2d27ff76459385e6cf7bbeacfbfaa00f9731a9 · jquery/api.jquery.com · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
<?xml version="1.0"?>
<entry type="selector" name="empty" return="">
  <title>:empty Selector</title>
  <sample>:empty</sample>
  <signature>
    <added>1.0</added>
  </signature>
  <desc>Select all elements that have no children (including text nodes).</desc>
  <longdesc>
    <p>This is the inverse of <code>:parent</code>. </p>
    <p>One important thing to note with :empty (and :parent) is that child elements include text nodes.</p>
    <p>The W3C recommends that the <code>&lt;p&gt;</code> element have at least one child node, even if that child is merely text (see http://www.w3.org/TR/html401/struct/text.html#edef-P). Some other elements, on the other hand, are empty (i.e. have no children) by definition: &lt;input&gt;, &lt;img&gt;, &lt;br&gt;, and &lt;hr&gt;, for example.</p>
  </longdesc>
  <example>
    <desc>Finds all elements that are empty - they don't have child elements or text.</desc>
    <code><![CDATA[
$( "td:empty" )
  .text( "Was empty!" )
  .css( "background", "rgb(255,220,200)" );
]]></code>
    <css><![CDATA[
  td {
    text-align: center;
  }
]]></css>
    <html><![CDATA[
<table border="1">
  <tr><td>TD #0</td><td></td></tr>
  <tr><td>TD #2</td><td></td></tr>
  <tr><td></td><td>TD#5</td></tr>
</table>
]]></html>
  </example>
  <category slug="selectors/content-filter-selector"/>
  <category slug="version/1.0"/>
</entry>