jquery.alterClass.js

/**
 * jQuery.alterClass
 *
 * For altering classes
 *
 * @param removals (wildcards are possible)
 * [@param] additions
 * @return jQuery object
 *
 * @author Axel Jack Fuchs (Cologne, Germany)
 * @date 01-03-2016 10:33
 * @url https://gist.github.com/jackfuchs/3583421f2b21553efb364868e8c17be0
 *
 * Example
 * Before: <div class="remove-foo-1 remove-foo-2 remove-bar"></div>
 * Alter: $('div').alterClass('remove-foo-* remove-bar', 'add-foo add-bar');
 * Result: <div class="add-foo add-bar"></div>
 */

$.fn.alterClass = function (removals, additions) {
    var self = this;

    if (removals.indexOf('*') === -1) {
        self.removeClass(removals);
        return !additions ? self : self.addClass(additions);
    }

    var patt = new RegExp('\\s'+ removals.replace(/\*/g, '[A-Za-z0-9-_]+').split(' ').join('\\s|\\s') +'\\s', 'g');

    self.each(function (i, it) {
        var cn = ' '+ it.className +' ';

        while (patt.test(cn)) {
            cn = cn.replace(patt, ' ');
        }

        it.className = $.trim(cn);
    });

    return !additions ? self : self.addClass(additions);
};