ArcGIS template

HTML

<script src="http://js.arcgis.com/3.8/"></script>
<link rel="stylesheet" href="http://js.arcgis.com/3.8/js/esri/css/esri.css">
<div id="mapDiv"></div>

CSS

<style>
    html, body, #mapDiv {
      padding: 0;
      margin: 5;
      height: 50%;
    }
  </style>

JavaScript

var map;
  require(["esri/map", "dojo/domReady!"], function(Map) { 
    map = new Map("mapDiv", {
      center: [-60, 38.485],
      zoom: 3,
      basemap: "streets"
    });
  });