<meta name="viewport" content="initial-scale=1
,maximum-scale=1,user-scalable=no" />
<title>Line of sight widget | Sample | ArcGIS Maps
SDK for JavaScript 4.31</title>
<link rel="stylesheet" href="https://js.arcgis.com/4
.31/esri/themes/light/main.css" />
<script src="https://js.arcgis.com/4.31/"></script>
"esri/widgets/LineOfSight",
"esri/core/reactiveUtils"
], (WebScene, SceneView, LineOfSight, Expand,
Point, Graphic, reactiveUtils) => {