How to get elements of specific class starting with a given string?

Question

I have a list of elements that have multiple classes, for example:

Answer 1

Try this,

if($(selector).attr("class").lastIndexOf("classToStartFrom") == 0)
   return "this selector class name starts with 'classToStartFrom'";
else
   return "this selector class name doesn't start with 'classToStartFrom'";

The code is not tested.