ACT.YouTube.DM.PiP-button

Add a PiP button to the player to easy enter Picture-in-Picture mode.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name               ACT.YouTube.DM.PiP-button
// @name:zh-CN         ACT.YouTube.DM.画中画按钮
// @description        Add a PiP button to the player to easy enter Picture-in-Picture mode.
// @description:zh-CN  为播放器添加画中画按钮,轻松进入画中画模式。
// @author             ACTCD
// @version            20221105.1
// @license            GPL-3.0-or-later
// @namespace          ACTCD/Userscripts
// @supportURL         https://github.com/ACTCD/Userscripts
// @homepageURL        https://github.com/ACTCD/Userscripts
// @match              *://*.youtube.com/*
// @grant              none
// @inject-into        content
// @run-at             document-start
// ==/UserScript==

(function () {
	"use strict";

	if (!document.pictureInPictureEnabled) {
		console.log("Your browser cannot use picture-in-picture right now");
		return;
	}

	// Create PiP Button
	const pip_button = document.createElement("button");
	pip_button.title = "Picture-in-Picture";
	const svg = document.createElement("svg");
	svg.setAttribute("width", "100%");
	svg.setAttribute("height", "100%");
	svg.setAttribute("viewBox", "-8 -6 36 36");
	const path = document.createElement("path");
	const path1 =
		"M2.5,17A1.5,1.5,0,0,1,1,15.5v-9A1.5,1.5,0,0,1,2.5,5h13A1.5,1.5,0,0,1,17,6.5V10h1V6.5A2.5,2.5,0,0,0,15.5,4H2.5A2.5,2.5,0,0,0,0,6.5v9A2.5,2.5,0,0,0,2.5,18H7V17Z M18.5,11h-8A2.5,2.5,0,0,0,8,13.5v5A2.5,2.5,0,0,0,10.5,21h8A2.5,2.5,0,0,0,21,18.5v-5A2.5,2.5,0,0,0,18.5,11Z";
	const path2 =
		"M18.5,11H18v1h.5A1.5,1.5,0,0,1,20,13.5v5A1.5,1.5,0,0,1,18.5,20h-8A1.5,1.5,0,0,1,9,18.5V18H8v.5A2.5,2.5,0,0,0,10.5,21h8A2.5,2.5,0,0,0,21,18.5v-5A2.5,2.5,0,0,0,18.5,11Z M14.5,4H2.5A2.5,2.5,0,0,0,0,6.5v8A2.5,2.5,0,0,0,2.5,17h12A2.5,2.5,0,0,0,17,14.5v-8A2.5,2.5,0,0,0,14.5,4Z";
	path.setAttribute("fill", "#fff");
	svg.append(path);
	if (location.hostname == "m.youtube.com") {
		pip_button.style.setProperty("position", "absolute");
		pip_button.style.setProperty("z-index", "100");
		pip_button.style.setProperty("top", "0px");
		pip_button.style.setProperty("left", "4px");
		svg.setAttribute("width", "42px");
	} else {
		pip_button.className = "ytp-button";
		path.id = "ACT_PiP_Path";
		const use = document.createElement("use");
		use.className = "ytp-svg-shadow";
		use.setAttribute("href", "#" + path.id);
		path.before(use);
	}
	pip_button.addEventListener(
		"click",
		(event) => {
			const video = document.querySelector("video[src]");
			if (!video) return;
			if (video.webkitPresentationMode === undefined) {
				if (document.pictureInPictureElement) {
					document.exitPictureInPicture();
				} else {
					video.requestPictureInPicture();
				}
			} else {
				if (video.webkitPresentationMode != "inline") {
					video.webkitSetPresentationMode("inline");
				} else {
					video.webkitSetPresentationMode("picture-in-picture");
				}
			}
			event.preventDefault();
			event.stopImmediatePropagation();
		},
		true,
	);
	const pip_button_act = (pathx) => {
		path.setAttribute("d", pathx);
		pip_button.innerHTML = svg.outerHTML;
	};
	pip_button_act(path1);

	// Insert PiP Button (desktop) // Fixed once for unreliable @run-at document-start
	document.querySelector(".ytp-miniplayer-button")?.before(pip_button);

	// Video element initialization
	const enterpictureinpicture = (e) => pip_button_act(path2);
	const leavepictureinpicture = (e) => pip_button_act(path1);
	const webkitpresentationmodechanged = (event) => {
		event.target.webkitPresentationMode == "picture-in-picture"
			? (pip_button_act(path2), event.stopImmediatePropagation())
			: pip_button_act(path1);
	};
	const pip_init = (video) => {
		if (!video || video.nodeName != "VIDEO" || !video.hasAttribute("src"))
			return;
		if (video.webkitPresentationMode === undefined) {
			video.addEventListener("enterpictureinpicture", enterpictureinpicture);
			video.addEventListener("leavepictureinpicture", leavepictureinpicture);
		} else {
			video.addEventListener(
				"webkitpresentationmodechanged",
				webkitpresentationmodechanged,
				true,
			);
		}
	};
	pip_init(document.querySelector("video[src]"));

	// Dynamic adjustment
	new MutationObserver((mutationList) => {
		mutationList.forEach((mutation) => {
			if (mutation.type == "childList") {
				mutation.addedNodes.forEach((node) => {
					if (node.nodeType != Node.ELEMENT_NODE) return;
					node.nodeName == "VIDEO" && pip_init(node);
					node.classList.contains("ytp-miniplayer-button") &&
						node.before(pip_button); // Insert PiP Button (desktop)
				});
				mutation.removedNodes.forEach((node) => {
					if (node.nodeType != Node.ELEMENT_NODE) return;
					node.classList.contains("ytp-miniplayer-button") &&
						pip_button.remove();
					node.id == "player-control-overlay" && pip_button.remove();
				});
			}
			if (mutation.type == "attributes") {
				mutation.target.nodeName == "VIDEO" &&
					mutation.attributeName == "src" &&
					pip_init(mutation.target);
				if (
					mutation.target.id == "player-control-overlay" &&
					mutation.attributeName == "class"
				) {
					// Insert PiP Button (mobile)
					mutation.target.classList.contains("fadein")
						? document.querySelector("#player")?.append(pip_button)
						: pip_button.remove();
				}
				if (
					mutation.attributeName == "class" &&
					mutation.target ==
						document.querySelector(".player-controls-top")?.parentNode
				) {
					mutation.target.classList.contains("player-controls-hide")
						? pip_button.remove()
						: document
								.querySelector("#player-control-overlay")
								?.classList.contains("fadein") &&
						  document.querySelector("#player")?.append(pip_button);
				}
				if (
					mutation.target.id == "player" &&
					mutation.attributeName == "hidden"
				) {
					mutation.target.hasAttribute("hidden") &&
						(pip_button.remove(), document.exitPictureInPicture());
				}
			}
		});
	}).observe(document, { subtree: true, childList: true, attributes: true });
})();