Export a Playlist from Spotify web player

spotify-playlist-export.js

let myPlaylist = {}
const trackNumberColumn = 1
const trackNameColumn = 2
const trackArtistColumn = 3
const trackListContainer = document.querySelector("[data-testid='track-list']");
const totalHeight = trackListContainer.scrollHeight;

let currentPosition = 0;
exportPlaylist();

function exportPlaylist() {
    if (currentPosition < totalHeight) {
        appendNextToPlaylist()
    } else {
        const tracks = Object.keys(myPlaylist)
            .map((trackNumber) => [trackNumber, myPlaylist[trackNumber]])
            .sort((a, b) => a[0] - b[0])
            .map((track) => track[1]);
        console.log(tracks.join("\n"));
    }
}

function appendNextToPlaylist() {
    const currentTrackList = trackListContainer.querySelectorAll("[data-testid='tracklist-row']");

    trackListContainer.offsetParent.scrollTo(0, currentPosition);
    currentPosition += currentTrackList.length * 12; // assume each row is 12px height

    setTimeout(() => {
        currentTrackList.forEach((trackRow) => {
            const numberCell = trackRow.querySelector(`[role='gridcell'][aria-colindex='${trackNumberColumn}']`)
            const number = parseInt(numberCell.innerText, 10)

            if (myPlaylist[number] === undefined) {
                const nameCell = trackRow.querySelector(`[role='gridcell'][aria-colindex='${trackNameColumn}']`)
                const artistCell = trackRow.querySelector(`[role='gridcell'][aria-colindex='${trackArtistColumn}']`)
                const trackName = `${artistCell.innerText} - ${nameCell.innerText}`
                myPlaylist[number] = trackName.replace(/\n.*$/, "")
            }
        });

        exportPlaylist()
    }, 1000);
}