https://lesiffs.fr/wp-content/themes/corporate-plus/assets/library…/jquery.parallax.js?ver=1.1.3

1/*
2 Plugin: jQuery Parallax
3 Version 1.1.3
4 Author: Ian Lunn
5 Twitter: @IanLunn
6 Author URL: http://www.ianlunn.co.uk/
7 Plugin URL: http://www.ianlunn.co.uk/plugins/jquery-parallax/
8
9 Dual licensed under the MIT and GPL licenses:
10 http://www.opensource.org/licenses/mit-license.php
11 http://www.gnu.org/licenses/gpl.html
12 */
13
14(function( $ ){
15	var $window = $(window);
16	var windowHeight = $window.height();
17
18	$window.resize(function () {
19		windowHeight = $window.height();
20	});
21
22	$.fn.parallax = function(xpos, speedFactor, outerHeight) {
23		var $this = $(this);
24		var getHeight;
25		var firstTop;
26		var paddingTop = 0;
27
28		//get the starting position of each element to have parallax applied to it		
29		$this.each(function(){
30			firstTop = $this.offset().top;
31		});
32
33		if (outerHeight) {
34			getHeight = function(jqo) {
35				return jqo.outerHeight(true);
36			};
37		} else {
38			getHeight = function(jqo) {
39				return jqo.height();
40			};
41		}
42
43		// setup defaults if arguments aren't specified
44		if (arguments.length < 1 || xpos === null) xpos = "50%";
45		if (arguments.length < 2 || speedFactor === null) speedFactor = 0.1;
46		if (arguments.length < 3 || outerHeight === null) outerHeight = true;
47
48		// function to be called whenever the window is scrolled or resized
49		function update(){
50			var pos = $window.scrollTop();
51
52			$this.each(function(){
53				if ($(window).width() > 1230) {
54					var $element = $(this);
55					var top = $element.offset().top;
56					var height = getHeight($element);
57
58					// Check if totally above or totally below viewport
59					if (top + height < pos || top > pos + windowHeight) {
60						return;
61					}
62
63					$this.css('backgroundPosition', xpos + " " + Math.round((firstTop - pos) * speedFactor) + "px");
64				}
65
66			});
67		}
68
69		$window.bind('scroll', update).resize(update);
70		update();
71	};
72})(jQuery);