Reference the ArcGIS JavaScript API from our CDN and you are ready to get started:
<link rel="stylesheet" href="https://js.arcgis.com/3.29/esri/css/esri.css">
<script src="https://js.arcgis.com/3.29/"></script>
require(["esri/map"], function(Map) {
var map = new Map("map", {
center: [-118, 34.5],
zoom: 8,
basemap: "topo"
});
});
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