get-playlist.js

const code = 'your-refresh-token';

var SpotifyWebApi = require('spotify-web-api-node');

var spotifyApi = new SpotifyWebApi({
  clientId : 'a52cd8838b26488186753ad0047bf86a',
  clientSecret : '18c98110c7a84543afd65ce73186cdae',
  redirectUri: 'http://localhost:8080'
});

// Uncomment to retrieve an access token and a refresh token
/*spotifyApi.setRefreshToken(code);
spotifyApi.refreshAccessToken().then(
  function(data) {
    console.log('The token expires in ' + data.body['expires_in']);
    console.log('The access token is ' + data.body['access_token']);

    // Set the access token on the API object to use it in later calls
    spotifyApi.setAccessToken(data.body['access_token']);
  },
  function(err) {
    console.log('Something went wrong!', err);
  }
);
*/

spotifyApi.setAccessToken('your-retrieved-access-token');

function getTracks(offset) {
    return spotifyApi.getPlaylistTracks('1DTzz7Nh2rJBnyFbjsH1Mh', {
      offset: offset,
      limit: 100,
      fields: 'items'
    }).then( function(data) { 
      // console.log(offset); 
      return data.body.items; 
    });
}

function getAllTracks(arr, max) {
  return getTracks(arr.length).then(function(results) {
    if (arr.length == max) {
      return arr;
    } else {
      return getAllTracks(arr.concat(results), max);
    }
  });
}

spotifyApi.getPlaylist('1DTzz7Nh2rJBnyFbjsH1Mh')
  .then(
    function(data) {
      // console.log('The playlist contains so many tracks:', data.body.tracks.total);
      return data.body.tracks.total
    },
    function(err) {
      console.log('Could not retrieve playlist!', err);
    }
  )
  .then(function(length) {
     getAllTracks([], length)
       .then(function(tracks) {
         var items = []  
         for( let track of tracks ) {
           items.push({
             service: 'spop',
             title: track.track.name,
             artist: track.track.artists[0].name,
             album: track.track.album.name,
             uri: track.track.uri,
             albumart: (track.track.album.hasOwnProperty('images') && track.track.album.images.length > 0 ? track.track.album.images[0].url : ''),
           });
         }
         console.log(JSON.stringify(items));
       })
  })