Question

i have a div with the classes like

<div class="orignal sub-4 top-2">

what i want to achieve is to replace the classes sub-4 and top-2 with sub-3 and top-1 but retain the class orignal. Also is this possible to check for the prefix of a class like sub-* or to check if certain prefixed class is applied on an element.

Answer 1

You could do

$('.orignal').removeClass("sub-4 top-2").addClass('sub-3 top-1');

to check for the class thatstarts with sub- you could use the attribute contains selector

$('div[class*=sub-]').remove();