https://any-pill.com/wp-content/plugins/rich-table-of-content/js/rtoc_common.js

1jQuery(function($) {
2	const OpenClose = document.querySelector('.rtoc_open_close');
3	const listWrapper = document.querySelector('.level-1');
4	const listTitle = document.getElementById('rtoc-mokuji-title'); // RTOC ver1.2〜
5
6	// 開閉ボタン
7	if (OpenClose != null) {
8		if (OpenClose.classList.contains('rtoc_open')) {
9			OpenClose.textContent = rtocCloseText.rtocCloseText;
10		} else if (OpenClose.classList.contains('rtoc_close')) {
11			OpenClose.textContent = rtocOpenText.rtocOpenText;
12			listWrapper.classList.add('is_close');
13			listTitle.classList.add('is_close'); // RTOC ver1.2〜
14		}
15		OpenClose.addEventListener('click', () => {
16			listWrapper.classList.toggle('is_close');
17			listTitle.classList.toggle('is_close'); // RTOC ver1.2〜
18			if (listWrapper.classList.contains('is_close')) {
19				OpenClose.textContent = rtocOpenText.rtocOpenText;
20			} else {
21				OpenClose.textContent = rtocCloseText.rtocCloseText;
22			}
23		});
24	}
25});