Export Youtube Playlist in plaintext

Shows a list of the playlist video names in plaintext to be easily copied
当前为 2021-06-04 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         Export Youtube Playlist in plaintext
// @namespace    1N07
// @version      0.5
// @description  Shows a list of the playlist video names in plaintext to be easily copied
// @author       1N07
// @require      https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js
// @include      https://www.youtube.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    var listCreationAllowed = true;
    var urlAtLastCheck = "";
    setInterval(function(){
        if(urlAtLastCheck != window.location.href)
        {
            urlAtLastCheck = window.location.href;
            if(urlAtLastCheck.includes("/playlist?list="))
                InsertButtonASAP();
        }
    }, 100);


    function InsertButtonASAP()
    {
        let buttonInsertInterval = setInterval(function(){
            //wait for possible previous buttons to stop existing (due to how youtube loads pages) and for the space for the new button to be available
            if($("#exportPlainTextList").length == 0 && $("ytd-playlist-sidebar-secondary-info-renderer > #owner-container").length > 0)
            {
                $("ytd-playlist-sidebar-secondary-info-renderer > #owner-container").parent().after("<button id='exportPlainTextList'>Export as Plaintext</button>");
                $("#exportPlainTextList").click(ScrollUntillAllVisible);
                clearInterval(buttonInsertInterval);
            }
        }, 100);
    }

    function ScrollUntillAllVisible()
    {
        if(!listCreationAllowed)
            return;

        listCreationAllowed = false;
        $("#exportPlainTextList").after(`<p id="listBuildMessage" style="color: red; font-size: 1.33em;">Getting list... please wait.</p>`);
        let scrollInterval = setInterval(function(){
            if($("ytd-continuation-item-renderer.ytd-playlist-video-list-renderer").length)
                $(document).scrollTop($(document).height());
            else
            {
                BuildAndDisplayList();
                clearInterval(scrollInterval);
            }
        }, 100);
    }

    function BuildAndDisplayList()
    {
        let list = "";
        $("ytd-playlist-video-renderer #content #video-title").each(function(){
            list += $(this).attr("title") + "\n";
        });
        $("body").append('<div id="listDisplayContainer" style="position: fixed; z-index: 9999; top: 5%; right: 5%; background-color: gray; padding: 10px; border-radius: 5px;"><button style="float: right;" id="closeTheListThing">Close</button><textarea style="width: 50vw; height: 80vh; max-width: 90vw; max-height: 90vh;">'+list+'</textarea></div>');
        $("#listBuildMessage").remove();
        $("#closeTheListThing").click(function(){
            $("#listDisplayContainer").remove();
            listCreationAllowed = true;
        });
    }

})();
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