m.YouTube.com seek buttons

Adds +-30sec +-1min +-5min buttons below the video
Mint 2023.10.12.. Lásd a legutóbbi verzió
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// ==UserScript==
// @name         m.YouTube.com seek buttons
// @namespace    m-youtube-com-seek-buttons
// @version      1.0
// @description  Adds +-30sec +-1min +-5min buttons below the video
// @author       hlorand.hu
// @match        https://m.youtube.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=tampermonkey.net
// @grant        none
// @license      https://creativecommons.org/licenses/by-nc-sa/4.0/
// ==/UserScript==

(function() {
    //'use strict';

    function addbuttons(){
        document.getElementById("seekbuttons").innerHTML = "";

        const times = ["+300s", "+60s", "+30s", "-30s", "-60s", "-300s"];

        times.forEach((time)=>{
            let button = document.createElement('button');
            button.textContent = time;
            button.className = "speedbutton";

            button.style.margin = "5px";
            button.style.padding = "5px";
            button.style.backgroundColor = "purple";
            button.style.position = "relative";

            button.onclick = function() {
                let video = document.querySelector("video");

                if(video && video.readyState >= 2) {
                    video.currentTime += parseInt(this.textContent.replace("s",""));
                }
            };

            let target = document.getElementById("seekbuttons");
            target.insertBefore(button, target.firstChild);

        }); // end times foreach

    } // end addbuttons

    window.addEventListener('load', function () {
        setInterval(()=>{
            if( document.getElementById("seekbuttons") == undefined ){
                let parent = document.querySelector('.related-chips-slot-wrapper');
                let wrapper = document.createElement('div');
                wrapper.setAttribute("id","seekbuttons");
                parent.insertBefore(wrapper, parent.firstChild);
                addbuttons();
            }
        }, 1000);
    }); // end addEventListener


})();