https://hino-hino.com/wp-content/themes/affinger/js/scroll.js?ver=7.0

1/*--------------------------------
2 広告のフロート
3 -------------------------------*/
4;(function ($) {
5	'use strict';
6
7	$(function () {
8		var $main = $('main'); // メインカラムのID
9		var $side = $('#side aside'); // サイドバーのID
10		var $sticky = $('#scrollad'); // 広告を包む要素のID
11
12		if ($main.length === 0 || $side.length === 0 || $sticky.length === 0) {
13			return;
14		}
15
16		var $window = $(window);
17
18		var measureTrigger = function () {
19			var $measure;
20			var top;
21			var measurement;
22
23			$measure = $('<div />').css({
24				visibility  : 'hidden'
25			});
26
27			$sticky.before($measure);
28
29			top = $measure.offset().top;
30
31			measurement = {
32				top   : top,
33				bottom: top + $sticky.outerHeight()
34			};
35
36			$measure.remove();
37
38			return measurement;
39		};
40
41		var isStickable = function () {
42			// 960px以上は固定
43			if (window.matchMedia && window.matchMedia('screen and (min-width: 960px)').matches) {
44				return true;
45			}
46
47			return false;
48		};
49
50		var stick = function (top) {
51			var sideWidth = $side.outerWidth();
52			var sideLeft = $side.offset().left;
53
54			top = top || 0;
55
56			$sticky.css({
57				position: 'fixed',
58				width: sideWidth,
59				top: top,
60				left: sideLeft,
61				margi: 0
62			});
63
64			$side.addClass('is-fixed');
65		};
66
67		var unstick = function () {
68			$sticky.css({
69				position: 'static',
70				width: '',
71				top: '',
72				left: '',
73				margin: ''
74			});
75
76			$side.removeClass('is-fixed');
77		};
78
79		var adjust = function () {
80			var currentTop = $window.scrollTop();
81			var trigger = measureTrigger();
82			var mainBottom= $main.offset().top + $main.outerHeight();
83			var isStuck = (currentTop > trigger.top) && (trigger.bottom < mainBottom);
84			var bottomTrigger;
85			var stickyTop;
86
87			if (isStickable() && isStuck) {
88				bottomTrigger = mainBottom - $sticky.outerHeight();
89				stickyTop = (currentTop < bottomTrigger) ? 0 : (bottomTrigger - currentTop);
90
91				stick(stickyTop);
92			} else {
93				unstick();
94			}
95		};
96
97		$window.on('load', function() {

98			adjust();
99
100			setTimeout(function() {
101				adjust();
102			}, 1000);    // 読み込み完了後の調整
103		});
104
105		$window.on('scroll', function () {
106			adjust();
107		});
108
109		$window.on('resize', function() {
110			adjust();
111		});
112	});
113})(jQuery);