Fix for Yami's project

yami-scripts.js

// in portfolio/public/scripts.js
// [...]

/**
 * Returns an object with the query parameters passed in the
 * hash of the URL
 */
function getHashParams() {
  var hashParams = {};
  var e, r = /([^&;=]+)=?([^&;]*)/g,
      q = window.location.hash.substring(1);
  while ( e = r.exec(q)) {
     hashParams[e[1]] = decodeURIComponent(e[2]);
  }
  return hashParams;
}

$(document).ready(function($) {
  $('#s').on('submit', function() {
    searchArtists($('#originalartist').val());
    return false;
  });

  // read the parameters
  var params = getHashParams();
  
  // if "access_token" is there, it probably means that we have come back from the
  // Spotify authentication page, and we now have an access token
  if (params.access_token) {
    // yuhu!!!
    // make sure the Spotify Web API JS wrapper has an access token that it can use
    // to fetch the current user's info
    s.setAccessToken(params.access_token);
    // and now, let's call getMe(). Here we are using a Promise, but we could have
    // also used a callback function
    s.getMe().then(function(data) {
      // and here it goes the user's data!!!
      console.log(data);
    });
  }
});
// [...]