Shorts Auto Scroll

Auto-scroll to next YouTube Short.

K instalaci tototo skriptu si budete muset nainstalovat rozšíření jako Tampermonkey, Greasemonkey nebo Violentmonkey.

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

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Violentmonkey.

K instalaci tohoto skriptu si budete muset nainstalovat rozšíření jako Tampermonkey nebo Userscripts.

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

K instalaci tohoto skriptu si budete muset nainstalovat manažer uživatelských skriptů.

(Už mám manažer uživatelských skriptů, nechte mě ho nainstalovat!)

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.

(Už mám manažer uživatelských stylů, nechte mě ho nainstalovat!)

// ==UserScript==
// @name         Shorts Auto Scroll
// @namespace    http://tampermonkey.net/
// @version      2025-07-10
// @description  Auto-scroll to next YouTube Short.
// @author       vincent bruneau
// @match        *://www.youtube.com/*
// @grant        none
// @license      MIT
// ==/UserScript==

(function () {
    'use strict';

    let currentVideo = null;
    let currentSrc = null;

    function log(...args) {
        console.log('[Shorts Auto Scroll]', ...args);
    }

    function isShortsPage() {
        return location.pathname.startsWith("/shorts");
    }

    function getVideo() {
        return document.querySelector("video.video-stream.html5-main-video");
    }

    function getNextButton() {
        return document.querySelector('#navigation-button-down button');
    }

    function scrollToNext() {
        const btn = getNextButton();
        if (btn && btn.getAttribute("aria-disabled") !== "true") {
            log("Scrolling to next Short");
            btn.click();
        } else {
            log("Next button not found or disabled");
        }
    }

    function bindToVideo(video) {
        if (!video || video.dataset.autoScrollBound === "true") return;

        video.dataset.autoScrollBound = "true";
        video.dataset.autoScrollTriggered = "false";

        log("Bound to video element:", video.src);

        video.addEventListener("timeupdate", function () {
            const duration = video.duration;
            const current = video.currentTime;
            if (
                duration &&
                current / duration > 0.98 &&
                video.dataset.autoScrollTriggered !== "true"
            ) {
                video.dataset.autoScrollTriggered = "true";
                scrollToNext();
            }
        });

        video.addEventListener("play", function () {
            if (video.dataset.autoScrollTriggered === "true") {
                log("Video played again — resetting scroll trigger");
                video.dataset.autoScrollTriggered = "false";
            }
        });
    }

    function detectAndBindVideo() {
        if (!isShortsPage()) return;

        const video = getVideo();
        if (!video) return;

        const srcChanged = video.src !== currentSrc;
        if (video !== currentVideo || srcChanged) {
            currentVideo = video;
            currentSrc = video.src;
            bindToVideo(video);
        }
    }

    function init() {
        log("Shorts Auto Scroll initialized");

        setInterval(detectAndBindVideo, 1000);

        window.addEventListener("yt-navigate-finish", function () {
            currentVideo = null;
            currentSrc = null;
        });
    }

    init();
})();