# jQuery UI switchClass

## Overview

### 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 href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css" rel="stylesheet" type="text/css"/>
      <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>
      <script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.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>
      $(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).