gistfile1.txt

//var mapid = "e3b2c993ae3445acaa16cd5330c3b725";
var mapid = null;
if (mapid) {
  esri.arcgis.utils.createMap(mapid, "map").then(function(response) { 
    self.map = response.map;
    dojo.connect(dijit.byId("map"), "resize", self.map, self.map.resize);
  });
} else {
  this.map = new esri.Map("map",{
    extent: extent
  });

  var basemap = new esri.layers.ArcGISTiledMapServiceLayer("https://services.arcgisonline.com/ArcGIS/rest/services/Canvas/World_Light_Gray_Base/MapServer");
  this.map.addLayer(basemap);

  dojo.connect(this.map, "onLoad", function(map) {
    dojo.connect(dijit.byId("map"), "resize", map, map.resize);
  });
}