Exports a playlist from the Sportify web client as JSON.

export-spotify-playlist-as-json.js

  (() => {
    function mapItem(itemNode) {
      return {
        title: getText(itemNode, '.tracklist-name'),
        artist: getText(itemNode, '.TrackListRow__artists'),
        album: getText(itemNode, '.TrackListRow__album'),
        duration: getText(itemNode, '.tracklist-duration'),
        unplayable: itemNode.matches('.tracklist-row-unplayable')
      };
    }

    function getText(context, selector) {
      let node = context.querySelector(selector);
      return node ? node.innerText.trim() : "";
    }

    let list = Array.from(document.querySelectorAll('.contentSpacing > *:first-child .tracklist-row')).map(mapItem);
    return JSON.stringify(list);
  })();

Reminder: scroll all the way down before starting the script to lazy load all tracks.

For anyone also stumbling upon this. The code doesn't work anymore. Try: https://developer.spotify.com/documentation/web-api/reference/get-playlist. It is way easier and more reliable.