Question

I have the following html

<div class="static dynamic1 dynamic2 prop">Hello SO</div> 

I need to get dynamic1 and dynamic2 (get classname that which begins with dynamic)

Thanks.

Answer 1

Try this:

var cls = $('div')[0].className.split(' ');
var dynamics = $.grep(cls, function(v) {
    return v.indexOf('dynamic') > -1
})

http://jsfiddle.net/C88uF/

dynamics variable is an array, if you want to convert it to a string, you can use join method:

dynamics.join(' ')