https://malawiplus.com/wp-content/plugins/rich-table-of-content/js/rtoc_return.js?ver=7.1.2

1jQuery(function ($) {
2	// 目次へ戻るボタン（スマホのみ）
3	const ua = navigator.userAgent;
4	const rtocBackBtn = rtocBackButton.rtocBackButton;
5	if (!rtocBackBtn) return;
6	if (rtocBackBtn == 'on') {
7		if (ua.indexOf('iPhone') > -1 || (ua.indexOf('Android') > -1 && ua.indexOf('Mobile') > -1)) {
8			jQuery('body').append('<div id="rtoc_return"><a href="#rtoc-mokuji-wrapper">' + rtocBackText.rtocBackText + '</a></div>');
9			$(window).on('load scroll', function () {
10				if ($(this).scrollTop() > 1000) {
11					$('#rtoc_return').fadeIn('slow');
12				} else {
13					$('#rtoc_return').fadeOut('slow');
14				}
15			});
16			$('a[href^="#rtoc-mokuji-wrapper"]').click(function () {
17				var speed = 400;
18				var href = $(this).attr('href');
19				var target = $(href == '#' || href == '' ? 'html' : href);
20				var position = target.offset().top;
21				$('html, body').animate({ scrollTop: position }, speed, 'swing');
22				return false;
23			});
24		}
25
26		// PCで表示するにチェックが入っている場合
27		if (rtocBackDisplayPC.rtocBackDisplayPC) {
28			if (!(navigator.userAgent.indexOf('iPhone') > 0 || (navigator.userAgent.indexOf('Android') > 0 && navigator.userAgent.indexOf('Mobile') > 0) || navigator.userAgent.indexOf('iPad') > 0 || navigator.userAgent.indexOf('Android') > 0)) {
29				jQuery('body').append('<div id="rtoc_return"><a href="#rtoc-mokuji-wrapper">' + rtocBackText.rtocBackText + '</a></div>');
30				$(window).on('load scroll', function () {
31					if ($(this).scrollTop() > 600) {
32						$('#rtoc_return').fadeIn('slow');
33					} else {
34						$('#rtoc_return').fadeOut('slow');
35					}
36				});
37				$('a[href^="#rtoc-mokuji-wrapper"]').click(function () {
38					document.querySelector('#widget-tracking #rtoc-mokuji-wrapper').querySelector('.rtoc-mokuji').scrollTo(0, 0);
39
40					var speed = 400;
41					var href = $(this).attr('href');
42					var target = $(href == '#' || href == '' ? 'html' : href);
43					var position = target.offset().top;
44					$('html, body').animate({ scrollTop: position }, speed, 'swing');
45					return false;
46				});
47			}
48		}
49	}
50
51	const back_button = document.querySelector('#rtoc_return');
52	const back_button_link = document.querySelector('#rtoc_return a');
53	if (!back_button) {
54		return;
55	}
56
57	if (rtocButtonPosition.rtocButtonPosition == 'left') {
58		back_button.classList.add('back_button_left');
59	} else if (rtocButtonPosition.rtocButtonPosition == 'right') {
60		back_button.classList.add('back_button_right');
61	}
62	if (rtocVerticalPosition.rtocVerticalPosition.length) {
63		back_button_link.style.bottom = rtocVerticalPosition.rtocVerticalPosition + 'px';
64	}
65});