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How do I test whether an element has a particular class?
jQuery Interview Questions and Answers
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How do I test whether an element has a particular class?
hasClass (added in version 1.2) handles this common use case:
$("div").click(function(){
if ( $(this).hasClass("protected") )
$(this)
.animate({ left: -10 })
.animate({ left: 10 })
.animate({ left: -10 })
.animate({ left: 10 })
.animate({ left: 0 });
});
You can also use the is() method along with an appropriate selector for more advanced matching:
if ( $('#myDiv').is('.pretty.awesome') )
$('#myDiv').show();
Note that this method allows you to test for other things as well. For example, you can test whether an element is hidden (by using the custom :hidden selector):
if ( $('#myDiv').is(':hidden') )
$('#myDiv').show();
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