How Can I Check if a jQuery Element Has a Specific CSS Class?

Determining CSS Class Presence with jQuery

Question:

How can you ascertain if an element possesses a particular CSS class using jQuery?

Answer:

Leverage the hasClass method:

jQueryCollection.hasClass(className);

or

$(selector).hasClass(className);

Specify the class name as a string in the argument. This method returns a boolean value without supporting chaining.

Note: Whitespace in the specified class name will result in a literal match against the element's class string. For example, with the element:

<span></span>

$('span').hasClass('foo bar')

will return true, while:

$('span').hasClass('bar foo')
$('span').hasClass('foo  bar')

will return false.

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