adds a new button next to like that quick adds / removes the active video from your "Watch later" playlist
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// ==UserScript== // @name YouTube - Add Watch Later Button // @namespace https://openuserjs.org/users/zachhardesty7 // @author Zach Hardesty <[email protected]> (https://github.com/zachhardesty7) // @description adds a new button next to like that quick adds / removes the active video from your "Watch later" playlist // @copyright 2019-2021, Zach Hardesty (https://zachhardesty.com/) // @license GPL-3.0-only; http://www.gnu.org/licenses/gpl-3.0.txt // @version 1.5.1 // @homepageURL https://github.com/zachhardesty7/tamper-monkey-scripts-collection/raw/master/youtube-add-watch-later-button.user.js // @homepageURL https://openuserjs.org/scripts/zachhardesty7/YouTube_-_Add_Watch_Later_Button // @supportURL https://github.com/zachhardesty7/tamper-monkey-scripts-collection/issues // @include https://www.youtube.com* // @require https://greasyfork.org/scripts/419640-onelementready/code/onElementReady.js?version=887637 // ==/UserScript== // prevent eslint from complaining when redefining private function queryForElements from gist // eslint-disable-next-line no-unused-vars /* global onElementReady, queryForElements:true */ /* eslint-disable no-underscore-dangle */ const BUTTONS_CONTAINER_ID = "top-level-buttons-computed" const SVG_ICON_CLASS = "style-scope yt-icon" const SVG_PATH_FILLED = "M12,2C6.48,2,2,6.48,2,12c0,5.52,4.48,10,10,10s10-4.48,10-10C22,6.48,17.52,2,12,2z M14.97,16.95L10,13.87V7h2v5.76 l4.03,2.49L14.97,16.95z" const SVG_PATH_HOLLOW = "M14.97,16.95L10,13.87V7h2v5.76l4.03,2.49L14.97,16.95z M12,3c-4.96,0-9,4.04-9,9s4.04,9,9,9s9-4.04,9-9S16.96,3,12,3 M12,2c5.52,0,10,4.48,10,10s-4.48,10-10,10S2,17.52,2,12S6.48,2,12,2L12,2z" /** * Query for new DOM nodes matching a specified selector. * * @override */ // @ts-ignore queryForElements = (selector, _, callback) => { // Search for elements by selector const elementList = document.querySelectorAll(selector) || [] for (const element of elementList) callback(element) } /** * build the button el tediously but like the rest * * @param {HTMLElement} buttons - html node */ function addButton(buttons) { const zh = document.querySelectorAll("#zh-wl") // noop if button already present in correct place if (zh.length === 1 && zh[0].parentElement.id === BUTTONS_CONTAINER_ID) return // YT hydration of DOM can shift elements if (zh.length >= 1) { console.debug("watch later button(s) found in wrong place, fixing") for (const wl of zh) { if (wl.id !== BUTTONS_CONTAINER_ID) wl.remove() } } // normal action console.debug("no watch later button found, adding new button") const playlistSaveButton = document.querySelector( "#top-level-buttons-computed > ytd-button-renderer:last-child" ) // needed to force the node to load so we can determine if it's already in WL or not playlistSaveButton.click() playlistSaveButton.click() /** * @typedef {HTMLElement & { buttonRenderer: boolean, isIconButton?: boolean, styleActionButton?: boolean }} ytdButtonRenderer */ const container = /** @type {ytdButtonRenderer} */ ( document.createElement("ytd-button-renderer") ) container.setAttribute("style-action-button", "true") container.setAttribute("is-icon-button", "true") container.className = buttons.lastElementChild.className container.id = "zh-wl" buttons.append(container) const link = document.createElement("a") link.tabIndex = -1 link.className = buttons.children[buttons.children.length - 2].firstElementChild.className container.append(link) const buttonContainer = document.createElement("yt-icon-button") buttonContainer.id = "button" buttonContainer.className = buttons.children[ buttons.children.length - 2 ].lastElementChild.firstElementChild.className link.append(buttonContainer) const icon = document.createElement("yt-icon") icon.className = buttons.children[ buttons.children.length - 2 ].lastElementChild.firstElementChild.firstElementChild.firstElementChild.className buttonContainer.firstElementChild.append(icon) buttonContainer.firstElementChild["aria-label"] = "Save to Watch Later" // copy icon from hovering video thumbnails const svg = document.createElementNS("http://www.w3.org/2000/svg", "svg") svg.setAttribute("viewBox", "0 0 24 24") svg.setAttribute("preserveAspectRatio", "xMidYMid meet") svg.setAttribute("focusable", "false") svg.setAttribute("class", SVG_ICON_CLASS) svg.setAttribute( "style", "pointer-events: none; display: block; width: 100%; height: 100%;" ) icon.append(svg) const g = document.createElementNS("http://www.w3.org/2000/svg", "g") g.setAttribute("class", SVG_ICON_CLASS) svg.append(g) const path = document.createElementNS("http://www.w3.org/2000/svg", "path") path.setAttribute("class", SVG_ICON_CLASS) path.setAttribute("d", SVG_PATH_HOLLOW) g.append(path) const text = document.createElement("yt-formatted-string") text.id = "text" link.append(text) text.className = buttons.children[buttons.children.length - 2].querySelector( "#text" ).className text.textContent = "later" let hasListener = false onElementReady( "#playlists .ytd-add-to-playlist-renderer #checkbox", { findOnce: false }, (checkbox) => { if (!hasListener && checkbox.textContent.trim() === "Watch later") { hasListener = true console.debug("no click listener, adding new click listener") const watchLaterCheckbox = /** @type {HTMLInputElement} */ (checkbox) path.setAttribute( "d", watchLaterCheckbox?.checked ? SVG_PATH_FILLED : SVG_PATH_HOLLOW ) container.addEventListener("click", () => { watchLaterCheckbox?.click() path.setAttribute( "d", watchLaterCheckbox?.checked ? SVG_PATH_FILLED : SVG_PATH_HOLLOW ) }) } } ) } // YouTube uses a bunch of duplicate 'id' tag values. why? // this makes it much more likely to target right one, but at the cost of being brittle onElementReady( `#info #info-contents #menu #${BUTTONS_CONTAINER_ID}`, { findOnce: false }, addButton )
