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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 layers-featurelayer-collection-edits sample,
     read the original sample description at developers.arcgis.com.
     https://developers.arcgis.com/javascript/latest/sample-code/layers-featurelayer-collection-edits/
     -->
    <title>
      Add or remove graphics from a FeatureLayer | Sample | ArcGIS API for
      JavaScript 4.23
    </title>

    <link
      rel="stylesheet"
      href="https://js.arcgis.com/4.23/esri/themes/light/main.css"
    />
    <script src="https://js.arcgis.com/next/"></script>
    <style>
      html,
      body,
      #viewDiv {
        padding: 0;
        margin: 0;
        height: 100%;
        width: 100%;
      }
      #add {
          margin-bottom: 5px;
      }
      #actions {
          padding: 5px;
      }
      button:disabled {
          opacity: 0.4;
          -moz-opacity: 0.4; /* Firefox and Mozilla browsers */
          -webkit-opacity: 0.4; /* Safari */
          cursor: default;
      }
    </style>

    <script>
      require([
        "esri/Map",
        "esri/views/MapView",
        "esri/Basemap",
        "esri/layers/VectorTileLayer",
        "esri/layers/FeatureLayer",
        "esri/Graphic",
        "esri/widgets/Legend"
      ], (
        Map,
        MapView,
        Basemap,
        VectorTileLayer,
        FeatureLayer,
        Graphic,
        Legend
      ) => {
        // create map using custom basemap from ArcGIS Online
        const map = new Map({
          basemap: new Basemap({
            baseLayers: [
              new VectorTileLayer({
                portalItem: { id: "474f0cb226884dd68f707ab0f2f1aa10" }
              })
            ],
            referenceLayers: [
              new VectorTileLayer({
                portalItem: { id: "1768e8369a214dfab4e2167d5c5f2454" }
              })
            ]
          })
        });

        const view = new MapView({
          container: "viewDiv",
          map: map,
          zoom: 5,
          center: [-122.18, 37.49] // longitude, latitude
        });

        // create empty FeatureLayer
        const monumentLayer = new FeatureLayer({
          // create an instance of esri/layers/support/Field for each field object
          title: "National Monuments",
          fields: [
            {
              name: "ObjectID",
              alias: "ObjectID",
              type: "oid"
            },
            {
              name: "Name",
              alias: "Name",
              type: "string"
            },
            {
              name: "Type",
              alias: "Type",
              type: "string"
            }
          ],
          objectIdField: "ObjectID",
          geometryType: "point",
          spatialReference: { wkid: 4326 },
          source: addFeatures(),
          renderer: {
            type: "simple",
            symbol: {
              type: "picture-marker",
              url: "https://arcgis.github.io/arcgis-samples-javascript/sample-data/layers-ogcfeaturelayer/windmill.png",
              height: "64px",
              width: "64",
              xoffset: "40px",
              yoffset: "40px"
            }
          },
          popupTemplate: {
            title: "{Name}"
          }
        });
        map.add(monumentLayer);

        // fires when "Add Features" button is clicked
        function addFeatures() {
          // data to be added to the map
          const data = [
            {
              LATITUDE: 32.6735,
              LONGITUDE: -117.2425,
              TYPE: "National Monument",
              NAME: "Cabrillo National Monument"
            },
            {
              LATITUDE: 35.2234,
              LONGITUDE: -118.559,
              TYPE: "National Monument",
              NAME: "Cesar E. Chavez National Monument"
            },
            {
              LATITUDE: 37.6251,
              LONGITUDE: -119.085,
              TYPE: "National Monument",
              NAME: "Devils Postpile National Monument"
            },
            {
              LATITUDE: 35.2915,
              LONGITUDE: -115.0935,
              TYPE: "National Monument",
              NAME: "Castle Mountains National Monument"
            },
            {
              LATITUDE: 41.7588,
              LONGITUDE: -121.5267,
              TYPE: "National Monument",
              NAME: "Lava Beds National Monument"
            },
            {
              LATITUDE: 37.897,
              LONGITUDE: -122.5811,
              TYPE: "National Monument",
              NAME: "Muir Woods National Monument"
            },
            {
              LATITUDE: 41.8868,
              LONGITUDE: -121.3717,
              TYPE: "National Monument",
              NAME: "Tule Lake National Monument"
            }
          ];

          // create an array of graphics based on the data above
          var graphics = [];
          var graphic;
          for (var i = 0; i < data.length; i++) {
            graphic = new Graphic({
              geometry: {
                type: "point",
                latitude: data[i].LATITUDE,
                longitude: data[i].LONGITUDE
              },
              attributes: data[i]
            });
            graphics.push(graphic);
          }
          return graphics;
        }
      });
    </script>
  </head>

  <body>
    <div id="viewDiv"></div>
  </body>
</html>
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