# jQuery UI switchClass

## Overview

[edit]

### switchClass( remove, add, [duration] )

Switches from the class defined in the first argument to the class defined as second argument, using an optional transition.

### Dependencies

- Effects Core

### Example

- Demo
- View Source

Switch the class 'highlight' to 'blue' when a paragraph is clicked with a one second transition.

    $("p").click(function () {
          $(this).switchClass("highlight", "blue", 1000);
        });

    <!DOCTYPE html>
    <html>
    <head>
      <link type="text/css" href="http://jqueryui.com/latest/themes/base/ui.all.css" rel="stylesheet" />
      <script type="text/javascript" src="http://jqueryui.com/latest/jquery-1.3.2.js"></script>
      <script src="http://ui.jquery.com/latest/ui/effects.core.js"></script>
    <style type="text/css">
      p { margin: 4px; font-size:16px; font-weight:bolder;
          cursor:pointer; }
      .blue { background: blue; }
      .highlight { background:yellow; }
    </style>
      <script type="text/javascript">
      $(document).ready(function(){
        $("p").click(function () {
          $(this).switchClass("highlight", "blue", 1000);
        });
      });
      </script>
    </head>
    <body style="font-size:62.5%;">

    <p class="highlight">Click to switch</p>
    <p class="highlight">to blue</p>
    <p class="highlight">on these</p>
    <p class="highlight">paragraphs</p>

    </body>
    </html>

## Arguments

- ### remove

  Type:
    String

  The CSS class that will be removed.

- ### add

  Type:
    String

  The CSS class that will be added.

- ### duration

  Type:
    String, Number
  Optional

  A string representing one of the three predefined speeds ("slow", "normal", or "fast") or the number of milliseconds to run the animation (e.g. 1000).