Latest Contributions by XuanKuai1

I'm using ArcGIS API for JavaScript 4.8. My goal is to get the Census tract ID value of the clicked Feature in a FeatureLayer and display the ID value in an alert box. I got stuck when trying to use Query/QueryTask to fetch the value. My code goes here: require([     "esri/Map",     "esri/views/MapView",     "esri/layers/FeatureLayer",     "esri/layers/GroupLayer",     "esri/widgets/LayerList",     "esri/tasks/support/Query",     "esri/tasks/QueryTask",     "dojo/on",     "dojo/domReady!"   ],   function(     Map, MapView, FeatureLayer, GroupLayer, LayerList, Query, QueryTask, on   ) {     var map = new Map({       basemap: "topo"     });     var view = new MapView({       center: [-91.05, 30.5161109],       zoom: 11,       container: "viewDiv",       map: map,     });     // Generate link to Census tract details     view.when(function() {       on(view, "click", displayTractID);     });     function displayTractID(event) {       // TODO     }     // Define popup template and get feature layers     var census2000Template = {       title: "Census 2000",       content: [{         type: "fields",         fieldInfos: [{           fieldName: "TRACT",           label: "Tract",           visible: true         }, {           fieldName: "POPULATION",           label: "Population",           visible: true,           format: {             digitSeparator: true,             places: 0           }         }]       }]     };     var census2000Layer = new FeatureLayer({       url: "http://services.arcgis.com/KYvXadMcgf0K1EzK/ArcGIS/rest/services/Census_2000/FeatureServer/0",       outFields: ["*"],       popupTemplate: census2000Template     });     // Add feature layers to a group layer     var censusGroupLayer = new GroupLayer({       title: "Historic Census",       visible: true,       visibilityMode: "exclusive",       layers: [census2000Layer]     });     map.add(censusGroupLayer);   });‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ Could someone help me to fill out the TODO part or show me some sandbox examples? ... View more

In AGOL map viewer I can toggle layers. Is there anyway to do this with the web map embed in a HTML page? ... View more