text: 'use strict';
  // 22.1.3.13 Array.prototype.join(separator)
  var $export = require('./_export');
  var toIObject = require('./_to-iobject');
  var arrayJoin = [].join;
  
  // fallback for not array-like strings
  $export($export.P + $export.F * (require('./_iobject') != Object || !require('./_strict-method')(arrayJoin)), 'Array', {
    join: function join(separator) {
      return arrayJoin.call(toIObject(this), separator === undefined ? ',' : separator);
    }
  });
  