:first Selector
first selector
version added: 1.0jQuery(':first')
Description: Selects the first matched element.
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.
Additional Notes:
- Because
:firstis a jQuery extension and not part of the CSS specification, queries using:firstcannot take advantage of the performance boost provided by the native DOMquerySelectorAll()method. To achieve the best performance when using:firstto select elements, first select the elements using a pure CSS selector, then use.filter(":first").
Example:
Finds the first table row.
<!DOCTYPE html>
<html>
<head>
<style>
td { color:blue; font-weight:bold; }
</style>
<script src="http://code.jquery.com/jquery-1.7rc2.js"></script>
</head>
<body>
<table>
<tr><td>Row 1</td></tr>
<tr><td>Row 2</td></tr>
<tr><td>Row 3</td></tr>
</table>
<script>$("tr:first").css("font-style", "italic");</script>
</body>
</html>