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HTML 

              
                
<html>

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
  <!--
  ArcGIS API for JavaScript, https://js.arcgis.com
  For more information about the sketch-geometries sample, read the original sample description at developers.arcgis.com.
  https://developers.arcgis.com/javascript/latest/sketch-geometries/index.html
  -->
<title>Sketch temporary geometries - 4.5</title>

  <link rel="stylesheet" href="https://js.arcgis.com/4.5/esri/css/main.css">
  <script src="https://js.arcgis.com/4.5/"></script>

  <style>
    html,
    body,
    #viewDiv {
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
      font-family: verdana;
    }

    #topbar {
      background: #fff;
      position: absolute;
      top: 15px;
      right: 15px;
      padding: 10px;
    }

    .action-button {
      font-size: 16px;
      background-color: transparent;
      border: 1px solid #D3D3D3;
      color: #6e6e6e;
      height: 32px;
      width: 32px;
      text-align: center;
      box-shadow: 0 0 1px rgba(0, 0, 0, 0.3);
    }

    .action-button:hover,
    .action-button:focus {
      background: #0079c1;
      color: #e4e4e4;
    }

    .active {
      background: #0079c1;
      color: #e4e4e4;
    }
  </style>

  <script>
    require([
      "esri/views/SceneView",
      "esri/WebScene",
      "esri/widgets/Sketch/SketchViewModel",
      "esri/Graphic",
      "dojo/domReady!"
    ], function(
      MapView, WebMap,
      SketchViewModel, Graphic
    ) {

      // Arctic Ocean Basemap
      var webmap = new WebMap({
        portalItem: { // autocasts as new PortalItem()
          id: "d3f5b81139ee475c82a11c1a0352e8f3"
        }
      });

      var view = new MapView({
        container: "viewDiv",
        map: webmap
      });

      view.then(function(evt) {
        // create a new sketch view model
        var sketchViewModel = new SketchViewModel({
          view: view,
          pointSymbol: { // symbol used for points
            type: "simple-marker", // autocasts as new SimpleMarkerSymbol()
            style: "square",
            color: "#8A2BE2",
            size: "16px",
            outline: { // autocasts as new SimpleLineSymbol()
              color: [255, 255, 255],
              width: 3 // points
            }
          },
          polylineSymbol: { // symbol used for polylines
            type: "simple-line", // autocasts as new SimpleMarkerSymbol()
            color: "#8A2BE2",
            width: "4",
            style: "dash"
          },
          polygonSymbol: { // symbol used for polygons
            type: "simple-fill", // autocasts as new SimpleMarkerSymbol()
            color: "rgba(138,43,226, 0.8)",
            style: "solid",
            outline: {
              color: "white",
              width: 1
            }
          }
        });

        // ************************************************************
        // Get the completed graphic from the event and add it to view.
        // This event fires when user presses
        //  * "C" key to finish sketching point, polygon or polyline.
        //  * Double-clicks to finish sketching polyline or polygon.
        //  * Clicks to finish sketching a point geometry.
        // ***********************************************************
        sketchViewModel.on("draw-complete", function(evt) {
          view.graphics.add(evt.graphic)
          setActiveButton();
        });

        // *************************************
        // activate the sketch to create a point
        // *************************************
        var drawPointButton = document.getElementById("pointButton");
        drawPointButton.onclick = function() {
          // set the sketch to create a point geometry
          sketchViewModel.create("point");
          setActiveButton(this);
        };

        // ****************************************
        // activate the sketch to create a polyline
        // ****************************************
        var drawLineButton = document.getElementById("polylineButton");
        drawLineButton.onclick = function() {
          // set the sketch to create a polyline geometry
          sketchViewModel.create("polyline");
          setActiveButton(this);
        };

        // ***************************************
        // activate the sketch to create a polygon
        // ***************************************
        var drawPolygonButton = document.getElementById("polygonButton");
        drawPolygonButton.onclick = function() {
          // set the sketch to create a polygon geometry
          sketchViewModel.create("polygon");
          setActiveButton(this);
        };

        // **************
        // reset button
        // **************
        document.getElementById("resetBtn").onclick = function() {
          view.graphics.removeAll();
          sketchViewModel.reset();
          setActiveButton();
        };

        function setActiveButton(selectedButton) {
          // focus the view to activate keyboard shortcuts for sketching
          view.focus();
          var elements = document.getElementsByClassName("active");
          for (var i = 0; i < elements.length; i++) {
            elements[i].classList.remove("active");
          }
          if (selectedButton) {
            selectedButton.classList.add("active");
          }
        }
      });
    });
  </script>
</head>

<body>
  <div id="viewDiv">
    <div id="topbar">
      <button class="action-button esri-icon-blank-map-pin" id="pointButton" type="button"
        title="Draw point"></button>
      <button class="action-button esri-icon-polyline" id="polylineButton" type="button"
        title="Draw polyline"></button>
      <button class="action-button esri-icon-polygon" id="polygonButton" type="button"
        title="Draw polygon"></button>
      <button class="action-button esri-icon-trash" id="resetBtn" type="button" title="Clear graphics"></button>
    </div>
  </div>
</body>

</html>
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