1if ($('html').is('.m320, .m768')) { ... }
2//https://stackoverflow.com/questions/10559153/jquery-hasclass-for-multiple-values-in-an-if-statement
3

1var $html = $("html");
2
3if ($html.hasClass('m320') || $html.hasClass('m768')) {
4
5  // do stuff 
6  // https://stackoverflow.com/questions/10559153/jquery-hasclass-for-multiple-values-in-an-if-statement
7
8}
9

1jQuery('button').click(function(){
2    
3      var hcls =jQuery('p').hasClass('class2').addClass('class2');
4        
5      if(hcls == true){
6
7        alert('Yuor class is remove ');
8      }
9      else{
10
11        alert('your class is nnot remove');
12      }
13
14    });