"esri is not defined" using JavaScript API 4.6

AdminMaps

I am trying to create a very basic map and plot some hard coded points on it. Below is code and the highlighted line gives an error "esri is not defined".

view.when(function(){
   var draw = new Draw({
      view: view
   });

var symbol = {
   type: "simple-marker", // autocasts as new SimpleMarkerSymbol()
   style: "square",
   color: "blue",
   size: "8px", // pixels
   outline: { // autocasts as new SimpleLineSymbol()
   color: [ 255, 255, 0 ],
   width: 3 // points
   }
};

var points = {
"points": [[-122.63, 45.51], [-122.56, 45.51], [-122.56, 45.55], [-122.62, 45.00], [-122.59, 45.53]]
};

var mp = new esri.geometry.Multipoint(points);
var wm_mp = esri.geometry.geographicToWebMercator(mp);
});

rscheitlin

Legacy style coding is not supported in the 4.x api. So you need to require the multipoint geometry type instead and just use the MultiPoint class instead.