Function markFunction

dist-module/jquery.factory.slim.module.js:1296–1299

* Mark a function for special use by jQuery selector module * @param {Function} fn The function to mark

( fn )

 * @param {Function} fn The function to mark
 */
function markFunction( fn ) {
	fn[ jQuery.expando ] = true;
	return fn;
}

/**
 * Returns a function to use in pseudos for input types