Toggle Button for Non-sep Items

Hide li elements without "sep" class and add toggle button
当前为 2024-08-21 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         Toggle Button for Non-sep Items
// @namespace    https://jirehlov.com
// @version      0.2
// @description  Hide li elements without "sep" class and add toggle button
// @author       Jirehlov
// @match        https://bgm.tv/subject/*
// @match        https://bangumi.tv/subject/*
// @match        https://chii.in/subject/*
// @grant        none
// @license      MIT
// ==/UserScript==

(function () {
	"use strict";
	const ulElement = document.querySelector("div.subject_section ul.browserCoverMedium");
	if (!ulElement) return;
	const liElements = ulElement.querySelectorAll("li");
	let lastSepElement = null;
	let relatedItems = [];
	liElements.forEach(li => {
		if (li.classList.contains("sep")) {
			if (relatedItems.length > 0) {
				addToggleButton(lastSepElement, relatedItems);
				relatedItems = [];
			}
			lastSepElement = li;
		} else {
			if (lastSepElement) {
				relatedItems.push(li);
				li.style.display = "none";
			}
		}
	});
	if (relatedItems.length > 0) {
		addToggleButton(lastSepElement, relatedItems);
	}
	function addToggleButton(sepElement, relatedItems) {
		const subSpan = sepElement.querySelector("span.sub");
		if (!subSpan) return;
		const toggleButton = document.createElement("span");
		toggleButton.textContent = "[展开]";
		toggleButton.style.cursor = "pointer";
		toggleButton.style.color = "#2EA6FF";
		toggleButton.style.marginLeft = "5px";
		toggleButton.addEventListener("click", function () {
			const isHidden = relatedItems[0].style.display === "none";
			relatedItems.forEach(item => {
				item.style.display = isHidden ? "list-item" : "none";
			});
			toggleButton.textContent = isHidden ? "[折叠]" : "[展开]";
		});
		subSpan.appendChild(toggleButton);
	}
}());
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