dev/sample-app.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      html,
      body,
      #viewDiv {
        padding: 0;
        margin: 0;
        height: 100%;
        width: 100%;
      }
    </style>
    <link
      rel="stylesheet"
      href="https://js.arcgis.com/4.27/esri/css/main.css"
    />
    <script src="https://js.arcgis.com/4.27"></script>
    <script>
      require([
        "esri/Map", 
        "esri/views/MapView",
        "esri/core/reactiveUtils",
        "esri/layers/FeatureLayer"
      ], function (Map, MapView, reactiveUtils, FeatureLayer) {
        
        const fl = new FeatureLayer({
          url: "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/Landscape_Trees/FeatureServer/0"
        });
        
        const map = new Map({
          basemap: "topo-vector",
          layers: [fl],    
        });
      
        const view = new MapView({
          container: "viewDiv",
          map: map,
          
          extent: {
            xmin: -9177811,
            ymin: 4247000,
            xmax: -9176791,
            ymax: 4247784,
            spatialReference: 102100
          }
        });


        /* Sample snippet to contribute */
        view.whenLayerView(fl).then(function (layerView) {
          reactiveUtils
            .whenOnce(() => !layerView?.updating)
            .then(() => {
              layerView.queryFeatures().then(function (results) {
                console.log(results.features);
              });
            });
        });
        /* End of: Sample snippet to contribute */

      });
    </script>
  </head>
  <body>
    <div id="viewDiv"></div>
  </body>
</html>