Loop Fix

Fixes youtube video repeating when watching in playlist + refreshing page if video stopped downloading
As of 11. 09. 2024. See the latest version.
Ask a question, post a review, or report the script.
Wrap lines
// ==UserScript==
// @name         Loop Fix
// @description  Fixes youtube video repeating when watching in playlist + refreshing page if video stopped downloading
// @version      0.1
// @author       0vC4
// @namespace    https://greasyfork.org/users/670183
// @match        *://*.youtube.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @run-at       document-start
// @license      MIT
// @grant        none
// ==/UserScript==

(() => {
    function blockEvents(condition, ...events) {
        events = events.flat();
        const tag = window.EventTarget.prototype;
        tag._add = tag.addEventListener;
        tag.addEventListener = function (name, callback, options) {
            if (!events.includes(name)) return tag._add.call(this, name, callback, options);

            function cb(e) {
                if (!condition.call(this)) return;
                callback.call(this, e);
            };

            tag._add.call(this, name, cb, options);
        };
    }

    blockEvents(function() {
        return !this.loop; // have loop = block events
    }, 'pause', 'timeupdate', 'waiting');
})();

const log = window.console.log;
window.loopState = localStorage.getItem('loopState') ?? false;
function clicking(e) {
    window.loopState = JSON.parse(this.ariaChecked);
};

window.setInterval(()=>{
    const vid1 = window.document.querySelector('video.html5-main-video');
    if (vid1) localStorage.removeItem('loopState');
    if (vid1 && vid1.readyState === window.HTMLMediaElement.HAVE_CURRENT_DATA && !vid1.paused && +vid1.currentTime.toFixed(0) >= +vid1.buffered.end(0).toFixed(0)) {
        localStorage.setItem('loopState', window.loopState);
        window.location.href = window.location.href.split('?')[0] + '?t=' + vid1.currentTime.toFixed(0) + '&' + window.location.href.split('?')[1];
    }

    const repeat = window.document.querySelectorAll('.ytp-menuitem[tabindex="-1"]')[0];
    if (repeat && repeat.onclick != clicking) {
        repeat.onclick = clicking
    }
    const vid = window.document.querySelector('video.html5-main-video');
    if (vid && vid.loop != window.loopState) {
        vid.loop = window.loopState;
    }
});