.first()Returns: jQuery

Description: Reduce the set of matched elements to the first in the set.

version added: 1.4.first()
- This method does not accept any arguments.

Given a jQuery object that represents a set of DOM elements, the .first() method constructs a new jQuery object from the first element in that set.

Consider a page with a simple list on it:

<ul>
  <li>list item 1</li>
  <li>list item 2</li>
  <li>list item 3</li>
  <li>list item 4</li>
  <li>list item 5</li>
</ul>

We can apply this method to the set of list items:

1	`$( "li" ).first().css( "background-color", "red" );`

The result of this call is a red background for the first item.

Example:

Highlight the first item in a list.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>first demo</title>
  <style>
  .highlight {
    background-color: yellow;
  }
  </style>
  <script src="https://code.jquery.com/jquery-4.0.0.js"></script>
</head>
<body>
<ul>
  <li>Look:</li>
  <li>This is some text in a list.</li>
  <li>This is a note about it.</li>
  <li>This is another note about it.</li>
</ul>
<script>
$( "ul li" ).first().addClass( "highlight" );
</script>
</body>
</html>

.first()Returns: jQuery

version added: 1.4.first()

Demo: