:first Selector
Categories: jQuery Extensions | Basic Filter
jQuery(':first')
Description: Selects the first matched element.
-
jQuery(':first')
version added: 1.0
The :first
pseudo-class is equivalent to :eq(0)
. It could also be written as :lt(1)
. While this matches only a single element, :first-child can match more than one: One for each parent.
Note:
Because:first
is a jQuery extension and not part of the CSS specification, queries using :first
cannot take advantage of the performance boost provided by the native DOM querySelectorAll()
method. To achieve the best performance when using :first
to select elements, first select the elements using a pure CSS selector, then use .filter(":first")
.
Note:
Selected elements are in the order of their appearance in the document.-
Finds the first table row.
HTML:
<table> <tr><td>Row 1</td></tr> <tr><td>Row 2</td></tr> <tr><td>Row 3</td></tr> </table>
CSS:
td { color:blue; font-weight:bold; }
Code:
$("tr:first").css("font-style", "italic");