:first Selector

first ( ) version added: 1.0

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.

Examples:

Example: Finds the first table row. 

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>css demo</title>

  <style>

  td {
    color: blue;
    font-weight: bold;
  }

  </style>

  <script src="//code.jquery.com/jquery-1.10.2.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>

Demo: