JavaScript fixtures with rails and require.js

fixtures.js.erb

define([
  'underscore'    
], function(_) {

  var Fixtures = (function() {
    var _timezones;

    _timezones = <%= ActiveSupport::TimeZone::zones_map.to_json %>;

    return {
      getTimezones: function() {
        return _.clone(_timezones);
      }
    };
  
  })();

  return Fixtures;
});