text: 'use strict';
  
  mapboxgl.accessToken = getAccessToken();
  
  function getAccessToken() {
      var accessToken = (
          process.env.MapboxAccessToken ||
          process.env.MAPBOX_ACCESS_TOKEN ||
          getURLParameter('access_token') ||
          localStorage.getItem('accessToken')
      );
      localStorage.setItem('accessToken', accessToken);
      return accessToken;
  }
  
  function getURLParameter(name) {
      var regexp = new RegExp('[?&]' + name + '=([^&#]*)', 'i');
      var output = regexp.exec(window.location.href);
      return output && output[1];
  }
  