https://www.ecoreseau.fr/wp-content/plugins/reading-progress-bar/public/js/rp-public.js?ver=7.1.2

1(function( $ ) {
2	'use strict';
3	
4	// The DOM needs to be fully loaded (including graphics, iframes, etc)
5	$(window).on('load', function() {
6
7		// Maximum value for the progressbar
8		var winHeight = $(window).height(),
9		docHeight = $(document).height();
10		var max = docHeight - winHeight;
11		$('.readingProgressbar').attr('max', max);
12		
13		var progressForeground = $('.readingProgressbar').attr('data-foreground');
14		var progressBackground = $('.readingProgressbar').attr('data-background');
15		var progressHeight = $('.readingProgressbar').attr('data-height');
16		var progressPosition = $('.readingProgressbar').attr('data-position');
17		var progressCustomPosition = $('.readingProgressbar').attr('data-custom-position');
18		var progressFixedOrAbsolute = 'fixed';
19
20		// Custom position
21		if (progressPosition == 'custom') {
22			$('.readingProgressbar').appendTo(progressCustomPosition);
23			progressPosition = 'bottom';
24			progressFixedOrAbsolute = 'absolute';
25		}
26
27		// Styles
28		if ( progressPosition == 'top' ) {
29			var progressTop = '0';
30			var progressBottom = 'auto';
31		} else {
32			var progressTop = 'auto';
33			var progressBottom = '0';
34		}
35
36		$('.readingProgressbar').css({
37			'background-color' : progressBackground,
38			'color' :  progressForeground,
39			'height' :  progressHeight + 'px',
40			'top' : progressTop,
41			'bottom' : progressBottom,
42			'position' : progressFixedOrAbsolute,
43			'display' : 'block'
44		});
45
46		$('<style>.readingProgressbar::-webkit-progress-bar { background-color: transparent } .readingProgressbar::-webkit-progress-value { background-color: ' + progressForeground + ' } .readingProgressbar::-moz-progress-bar { background-color: ' + progressForeground + ' }</style>')
47		.appendTo('head');
48
49		// Inital value (if the page is loaded within an anchor)
50		var value = $(window).scrollTop();
51		$('.readingProgressbar').attr('value', value);
52		// Maths & live update of progressbar value
53		$(document).on('scroll', function() {
54			value = $(window).scrollTop();
55			$('.readingProgressbar').attr('value', value);
56		});
57	});
58	
59})( jQuery );