how to get class name with id in jquery code example

Example 1: jquery get class name

//jQuery get class name of element 
var className=$('#myElementID').attr('class');

Example 2: how to get class name in jquery

var className = $('#sidebar').attr('class');

Example 3: how to find a name of class from page in jquery

$("input[type='submit']").click(function() {
    if ($(".Mandatory").length > 0) {
        // Do some code here
    }
});