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ACT.YouTube.DM.Shorts2watch

Back to watch page from shorts feeds by one-click button, open shorts on the watch page in channel videos.

// ==UserScript==
// @name               ACT.YouTube.DM.Shorts2watch
// @name:zh-CN         ACT.YouTube.DM.短视频返回观看页
// @description        Back to watch page from shorts feeds by one-click button, open shorts on the watch page in channel videos.
// @description:zh-CN  一键从短视频饲养返回传统观看页面，在频道视频列表中以传统观看页面打开短视频。
// @author             ACTCD
// @version            20220722.1
// @license            GPL-3.0-or-later
// @namespace          ACTCD/Userscripts
// @supportURL         https://github.com/ACTCD/Userscripts#contact
// @homepageURL        https://github.com/ACTCD/Userscripts
// @match              *://*.youtube.com/*
// @grant              none
// @inject-into        content
// @run-at             document-start
// ==/UserScript==

(function () {
	"use strict";

	const button = document.createElement("button");
	button.id = "ACT_Shorts2watch";
	button.innerText = "Back to watch";
	const style = document.createElement("style");
	style.textContent = `
#ACT_Shorts2watch {
    border: 2px solid;
    border-radius: 10px;
    padding: 1px 5px;
    font-size: 1.8em;
    font-weight: 500;
    font-family: Roboto,Arial,sans-serif;
    color: black;
    background-color: transparent;
}
@media (prefers-color-scheme: dark) {
    #ACT_Shorts2watch { color: white; } 
}
`;
	if (location.hostname == "m.youtube.com") {
		button.style.setProperty("position", "fixed");
		button.style.setProperty("z-index", "100");
		button.style.setProperty("top", "8px");
		button.style.setProperty("right", "8px");
		button.style.setProperty("color", "white");
		button.style.setProperty("text-shadow", "black 1px 1px 2px");
	}
	button.addEventListener("click", (event) => {
		if (location.pathname.slice(0, 8) == "/shorts/") {
			location.href = "/watch?v=" + location.pathname.slice(8);
		}
		event.preventDefault();
		event.stopImmediatePropagation();
	});

	new MutationObserver((mutationList) => {
		// Hide shorts icon
		document
			.querySelectorAll('ytd-grid-video-renderer [overlay-style="SHORTS"]')
			.forEach((e) => e.style.setProperty("display", "none"));
		document
			.querySelectorAll('ytm-compact-video-renderer [data-style="SHORTS"]')
			.forEach((e) => e.style.setProperty("display", "none"));
		// Dynamic button
		if (location.pathname.slice(0, 8) == "/shorts/") {
			if (location.hostname == "m.youtube.com") {
				let t = document.body;
				t && t != button.parentNode && t.appendChild(button);
			}
			if (location.hostname == "www.youtube.com") {
				let t = document.querySelector("#masthead #logo");
				t && t.nextElementSibling != button && t.after(button);
			}
		} else {
			button.remove();
		}
	}).observe(document, { subtree: true, childList: true, attributes: true });

	const event_handle = (event) => {
		// Shorts in channel video list open on the watch page, not shorts feeds.
		const selectors_hotzone = [
			"ytd-grid-video-renderer ytd-thumbnail a yt-img-shadow img",
			"ytd-grid-video-renderer ytd-thumbnail a ytd-moving-thumbnail-renderer *",
			"ytd-grid-video-renderer ytd-thumbnail a #label-container",
			"ytd-grid-video-renderer #details #meta",
			"ytd-grid-video-renderer #details #meta *",
			"ytd-grid-video-renderer #details ytd-badge-supported-renderer",
			"ytd-reel-item-renderer ytd-thumbnail a yt-img-shadow img",
			"ytd-reel-item-renderer #details a",
			"ytd-reel-item-renderer #details a *",
			"ytm-compact-video-renderer a",
			"ytm-compact-video-renderer a *",
			"ytm-reel-item-renderer a",
			"ytm-reel-item-renderer a *",
		];
		const selectors_renderer = [
			...new Set(selectors_hotzone.map((v) => v.split(" ")[0])),
		];
		if (event.target.matches(selectors_hotzone.join())) {
			let anchor =
				event.target.closest('a[href^="/shorts/"]') ??
				event.target
					.closest(selectors_renderer.join())
					.querySelector('a[href^="/shorts/"]');
			if (anchor) {
				const href = anchor.getAttribute("href");
				if (href.slice(0, 8) == "/shorts/") {
					anchor.href = "/watch?v=" + href.slice(8);
					event.stopImmediatePropagation();
				}
			}
		}
	};

	window.addEventListener("click", event_handle, true);
	window.addEventListener("mousedown", event_handle, true);

	if (document.head) {
		document.head.append(style);
	} else {
		new MutationObserver((mutationList, observer) => {
			document.head && (observer.disconnect(), document.head.append(style));
		}).observe(document, { subtree: true, childList: true });
	}
})();