CSS

jquery if class exists

// given an element: <div id="myID" class="wrapper active"> 
//JQuery answer
	if ( $("#myID").hasClass("active") ){
      	//true: myID has class active
      } else {
      	//false: myID does not have class active
      }

if a class exists jquery

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

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 check if has class

if ($("#about").hasClass("opened")) {
  $("#about").animate({right: "-700px"}, 2000);
}

jquery check if class exists

// if class exist the expresion will return true and the code from if statement will execute
if ($(".mydivclass")){
    // Do something if class exists
} else {
    // Do something if class does not exist
}

jquery check if element has class starting with

/* Answer to: "jquery check if element has class starting with" */

if(!$(this).is('[class*="answerbox"]')) {
    //Finds element with no answerbox class
} else {
    //The element has already an answerbox class
}

jQuery check if class contains any element

jQuery(function ($) {
	if ($(".className").length == 0) {
		$(".element").removeAttr("style").hide();
	}else{
		$(".element").removeAttr("style").show();
	}	
});

if element has class jquery

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