Answers for "check if the element has class jquery"

jquery hasclass

if ($( "#foo" ).hasClass('className')) {
	$( "#foo" ).removeClass( 'className');
} else {
  $( "#foo" ).addClass( 'className');
}

detect if an element has a class jQurey

$("#EL_ID").hasClass("CLASS_NAME");

jquery check if a class exists

if ($(".mydivclass")[0]){
    // Do something if class exists
} else {
    // Do something if class does not exist
}

jquery hasclass

jQuery(Selector).hasClass('class_name');