Copy SoundCloud playlist items from one to another, and add user tracks to playlist

soundCloudPlaylist.js

const WAIT_OPEN_PLAYLIST_POPUP = 1000;
const WAIT_AFTER_ADD_PLAYLIST = 1500;

const PLAYLIST_NAME = 'Target';

const listItems = Array.from(document.querySelectorAll('.sc-button-group.sc-button-group-small:first-child'));

const addItemToPlaylist = (index) => {
    const node = listItems[index];

    if (!node) {
        console.log('Done with all currently loaded items.');
        return;
    }

    const hasLikedButton = node.querySelector('.sc-button-like.sc-button-selected');

    if (hasLikedButton) {
        console.log('Already liked index: ', index);

        setTimeout(() => {
            addItemToPlaylist(index + 1);
        }, 0);

        return;
    }

    node.querySelector('.sc-button-more').click();
    document.querySelector('button.sc-button-addtoset').click();

    setTimeout(() => {
        const playlistRow = Array.from(document.querySelectorAll('.addToPlaylistList__item')).find(node => node.querySelector(`[title="${PLAYLIST_NAME}"]`));
        const playListButton = playlistRow.querySelector('button.addToPlaylistButton:not(.sc-button-selected)');
    
        if (!playListButton) {
            console.log('Already added index: ', index);
    
            setTimeout(() => {
                addItemToPlaylist(index + 1);
            }, 0);
    
            return;
        }
    
        playListButton.click();
        console.log('Added index: ', index);
    
        setTimeout(() => {
            addItemToPlaylist(index + 1);
        }, WAIT_AFTER_ADD_PLAYLIST);
    }, WAIT_OPEN_PLAYLIST_POPUP);
};

addItemToPlaylist(0);