https://real-voice.info/wp-content/themes/glob/assets/js/classie.js?ver=1

1/*!
2 * classie - class helper functions
3 * from bonzo https://github.com/ded/bonzo
4 *
5 * classie.has( elem, 'my-class' ) -> true/false
6 * classie.add( elem, 'my-new-class' )
7 * classie.remove( elem, 'my-unwanted-class' )
8 * classie.toggle( elem, 'my-class' )
9 */
10/*jshint browser: true, strict: true, undef: true */
11/*global define: false */
12( function( window ) {
13    'use strict';
14// class helper functions from bonzo https://github.com/ded/bonzo
15    function classReg( className ) {
16        return new RegExp("(^|\\s+)" + className + "(\\s+|$)");
17    }
18// classList support for class management
19// altho to be fair, the api sucks because it won't accept multiple classes at once
20    var hasClass, addClass, removeClass;
21    if ( 'classList' in document.documentElement ) {
22        hasClass = function( elem, c ) {
23            return elem.classList.contains( c );
24        };
25        addClass = function( elem, c ) {
26            elem.classList.add( c );
27        };
28        removeClass = function( elem, c ) {
29            elem.classList.remove( c );
30        };
31    }
32    else {
33        hasClass = function( elem, c ) {
34            return classReg( c ).test( elem.className );
35        };
36        addClass = function( elem, c ) {
37            if ( !hasClass( elem, c ) ) {
38                elem.className = elem.className + ' ' + c;
39            }
40        };
41        removeClass = function( elem, c ) {
42            elem.className = elem.className.replace( classReg( c ), ' ' );
43        };
44    }
45    function toggleClass( elem, c ) {
46        var fn = hasClass( elem, c ) ? removeClass : addClass;
47        fn( elem, c );
48    }
49    var classie = {
50        // full names
51        hasClass: hasClass,
52        addClass: addClass,
53        removeClass: removeClass,
54        toggleClass: toggleClass,
55        // short names
56        has: hasClass,
57        add: addClass,
58        remove: removeClass,
59        toggle: toggleClass
60    };
61// transport
62    if ( typeof define === 'function' && define.amd ) {
63        // AMD
64        define( classie );
65    } else {
66        // browser global
67        window.classie = classie;
68    }
69})( window );