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

I just made @Vohuman 's function to reusable one :

// getClassStartsWith(classes,startswith);
// Example : getClassStartsWith( 'item w-2 h-4 hello' , 'h-' );
function getClassStartsWith(t,n){var r=$.grep(t.split(" "),function(t,r){return 0===t.indexOf(n)}).join();return r||!1}

Example...

HTML :

JS :

var $element = $('.item');
var classes = $element[0].className;
var getHeight = getClassStartsWith(classes,'h-');

That will return h-4, And if no class starts with h- will return false

Demo : http://jsbin.com/mijujunaca/edit?js,console