https://www.newcastle.gov.uk/sites/default/files/js/optimized/js_m…LOU2ZeqeBSCeGtZNlb_cdOb9oIAIHg.js?v=10.6.17

1/**
2 * @file
3 * The Lazy-load behavior.
4 */
5
6(function (Drupal) {
7
8  'use strict';
9
10  Drupal.behaviors.lazy = {
11    attach: function (context, settings) {
12      var utils = {
13        extend: function (obj, src) {
14          Object.keys(src).forEach(function (key) {
15            obj[key] = src[key];
16          });
17          return obj;
18        },
19        once: function (selector, context) {
20          return (context || document).querySelector(selector);
21        },
22        loadScript: function (url) {
23          if (document.querySelectorAll('script[src="' + url + '"]').length == 0) {
24            var script = document.createElement('script'),
25              scripts = document.getElementsByTagName('script')[0];
26            script.src = url;
27            script.async = true;
28            scripts.parentNode.insertBefore(script, scripts);
29          }
30        }
31      };
32
33      if (utils.once('body', context)) {
34        var lazysizes = settings.lazy.lazysizes || {};
35
36        if (!settings.lazy.preferNative) {
37          // 1. Lazysizes configuration.
38          window.lazySizesConfig = window.lazySizesConfig || {};
39          window.lazySizesConfig = utils.extend(window.lazySizesConfig, lazysizes);
40          // 2. Load all selected lazysizes plugins.
41          if (!Object.entries) {
42            Object.entries = function (obj) {
43              var ownProps = Object.keys(obj),
44                i = ownProps.length,
45                resArray = new Array(i);
46              while (i--) {
47                resArray[i] = [ownProps[i], obj[ownProps[i]]];
48              }
49              return resArray;
50            };
51          }
52          var min = settings.lazy.minified ? '.min' : '';
53          Object.entries(lazysizes.plugins).forEach(function (path) {
54            utils.loadScript(settings.lazy.libraryPath + '/plugins/' + path[1] + min + '.js');
55          });
56          // 3. Load the lazysizes library.
57          utils.loadScript(settings.lazy.libraryPath + '/lazysizes' + min + '.js');
58        }
59      }
60    }
61  };
62
63})(Drupal);