https://www.norrtalje.se/Static/js/Abou.responsiveimages.js?v=639237714360000000

1// Example of js-plugin; How to extend the Abou namespace
2; (function (window, document, Abou, $, undefined) {
3
4    // Custom namespace (plugin)
5    Abou.responsiveimages = (function () {
6        var currentWidth = 0;
7
8        var monitorResize = function () {
9            
10            // Check if the window have changed size - if yes, check if images need to be changed 
11            if (currentWidth != window.innerWidth)
12            {
13                // Only check images that have a class with the name 'responsiveImage'
14                $(".responsiveImage").each(function () {
15                    var $imageTag = $(this);
16                    if (Abou.common.isMobileMode() && $imageTag.data('mobilesrc')) {
17                        // Mobile is indicated - lets show the mobile image if one exist
18                        $imageTag.attr('src', $imageTag.data('mobilesrc'));
19                    }
20                    else if ($imageTag.data('fullscreensrc')) {
21                        // Lets show the original sized image if it exist
22                        $imageTag.attr('src', $imageTag.data('fullscreensrc'));
23                    }
24                });
25
26                currentWidth = window.innerWidth;
27            }
28
29            // Check again in 500 ms
30            setTimeout(function () { monitorResize() }, 500);
31        }
32
33        // Public properties
34        return {
35
36            init: function () {
37                monitorResize();
38            }
39        };
40    }());
41
42}(this, this.document, window.Abou = window.Abou || {}, jQuery));