https://www.semae.fr/wp-content/themes/gnis/static/js/responsive-background.js?ver=1.0

1jQuery(function($) {
2    $(document).ready(function () {
3        setResponsiveBackground();
4    });
5    $(window).on('resize', function () {
6        setResponsiveBackground();
7    });
8    function setResponsiveBackground(){
9        $("[data-srcset]").each(function( index ) {
10            if ($(this).data("srcset")){
11                var tImages = $(this).data("srcset").split(",");
12                var max=parseInt(tImages.length-1);
13                for (i=max; i > -1; i--) {
14                    var tSplit = tImages[i].split(" ");
15                    if ($(window).width() >= tSplit[1]) {
16
17                        if (tSplit[0].trim() != "") {
18                            /*var images = new Array();
19                            images[i] = new Image();
20                            images[i].src = tSplit[0];*/
21
22                            if ($(this).attr("data-srccurrent") != tSplit[0]) {
23                                $(this).addClass('lazyload');
24                                $(this).attr('data-bg', tSplit[0]);
25                                //$(this).css('background-image', "url('" + tSplit[0] + "')");
26                                $(this).attr("data-srccurrent", tSplit[0]);
27                            }
28                        }
29                        break;
30                    }
31                }
32            }
33        });
34    }
35});