Display a pop-up

Learn how to format a pop-up to show attributes in a feature layer.

A feature layer is a dataset in a hosted feature service. Each feature layer contains features with a single geometry type and a set of attributes. You can display attributes when users click on a feature by using a pop-up. Pop-ups can be configured to display raw attribute values, calculated values, or content in different ways including with charts or media.

In this tutorial, you use a PopupTemplate to display feature attributes in different ways in a pop-up for three different hosted feature layers.

Prerequisites

Steps

Create a new pen

1. To get started, either complete the Display a map tutorial or use this pen.

Set the API key

To access ArcGIS services, you need an API key.

1. Go to your dashboard to get an API key.

2. In CodePen, set the apiKey to your key, so it can be used to access basemap layer and location services.

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   esriConfig.apiKey = "YOUR_API_KEY";
   const map = new Map({
     basemap: "arcgis-topographic" // Basemap layer service
   });

Add modules

1. In the require statement, add the FeatureLayer module.

   More info

   The ArcGIS API for JavaScript uses AMD modules. The require function is used to load modules so they can be used in the main function. It's important to keep the module references and function parameters in the same order.

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     require([
         "esri/config",
         "esri/Map",
         "esri/views/MapView",
   
         "esri/layers/FeatureLayer"
       ],
   
       function(esriConfig,Map, MapView, FeatureLayer){
   

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Display attributes

The easiest way to display feature attributes is to reference the field names in the title or content area of a pop-up. Use a PopupTemplate class to define the content with attributes for the Trailheads feature layer.

1. Create a popupTrailheads and set the content property to a custom HTML string that will display information such as trail name and city jurisdiction.

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         const view = new MapView({
           container: "viewDiv",
           map: map,
           center: [-118.80543,34.02700], //Longitude, latitude
           zoom: 13
         });
   
         // Define a pop-up for Trailheads
         const popupTrailheads = {
           "title": "Trailhead",
           "content": "<b>Trail:</b> {TRL_NAME}<br><b>City:</b> {CITY_JUR}<br><b>Cross Street:</b> {X_STREET}<br><b>Parking:</b> {PARKING}<br><b>Elevation:</b> {ELEV_FT} ft"
         }
   

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2. Create a trailheads FeatureLayer. Set the url, outFields, and popupTemplate properties before adding trailheads to the map. The FeatureLayer will autocast the popupTemplate to create a class instance of the object.

   More info

   The outFields property enables access to attribute data on the client-side.

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         // Define a pop-up for Trailheads
         const popupTrailheads = {
           "title": "Trailhead",
           "content": "<b>Trail:</b> {TRL_NAME}<br><b>City:</b> {CITY_JUR}<br><b>Cross Street:</b> {X_STREET}<br><b>Parking:</b> {PARKING}<br><b>Elevation:</b> {ELEV_FT} ft"
         }
   
       const trailheads = new FeatureLayer({
           url: "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Trailheads_Styled/FeatureServer/0",
           outFields: ["TRL_NAME","CITY_JUR","X_STREET","PARKING","ELEV_FT"],
           popupTemplate: popupTrailheads
         });
   
         map.add(trailheads);
   

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3. Click on the hiker icons to display the pop-up.

Display a chart

You can display different types of charts, also known as media content, in pop-ups. Charts are created by defining the type and fields (attributes) values. Use the PopupTemplate class to define a bar chart that shows the minimum and maximum elevation for the Trails feature layer.

1. Create a popupTrails. In the content property, set the type to media that will display a column-chart of minimum and maximum elevations for each trail.

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         map.add(trailheads);
   
         // Define a popup for Trails
         const popupTrails = {
           title: "Trail Information",
           content: [{
            type: "media",
             mediaInfos: [{
               type: "column-chart",
               caption: "",
               value: {
                 fields: [ "ELEV_MIN","ELEV_MAX" ],
                 normalizeField: null,
                 tooltipField: "Min and max elevation values"
                 }
               }]
           }]
         }
   

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2. Create a trails FeatureLayer. Set the url, outFields, and popupTemplate properties before adding trails to the map. The FeatureLayer will autocast the popupTemplate to create a class instance of the object.

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         // Define a popup for Trails
         const popupTrails = {
           title: "Trail Information",
           content: [{
            type: "media",
             mediaInfos: [{
               type: "column-chart",
               caption: "",
               value: {
                 fields: [ "ELEV_MIN","ELEV_MAX" ],
                 normalizeField: null,
                 tooltipField: "Min and max elevation values"
                 }
               }]
           }]
         }
   
         const trails = new FeatureLayer({
           url: "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Trails_Styled/FeatureServer/0",
           outFields: ["TRL_NAME","ELEV_GAIN"],
           popupTemplate: popupTrails
         });
   
         map.add(trails,0);
   

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3. Click on the trails to view a pop-up that contains a bar chart with elevation data.

Display a table

Feature attributes can also be displayed in a table. Use the PopupTemplate and fieldInfos classes to display attribute names and values in a table for the Parks and Open Spaces feature layer. One of the advantages of using a table with fieldInfos is the ability to format field values in different ways, for example, to show currency or the number of decimal places.

1. Create a popupOpenspaces. In the content property, set type to fields and define the fieldInfos array.

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         map.add(trails,0);
   
         // Define popup for Parks and Open Spaces
         const popupOpenspaces = {
           "title": "{PARK_NAME}",
           "content": [{
             "type": "fields",
             "fieldInfos": [
               {
                 "fieldName": "AGNCY_NAME",
                 "label": "Agency",
                 "isEditable": true,
                 "tooltip": "",
                 "visible": true,
                 "format": null,
                 "stringFieldOption": "text-box"
               },
               {
                 "fieldName": "TYPE",
                 "label": "Type",
                 "isEditable": true,
                 "tooltip": "",
                 "visible": true,
                 "format": null,
                 "stringFieldOption": "text-box"
               },
               {
                 "fieldName": "ACCESS_TYP",
                 "label": "Access",
                 "isEditable": true,
                 "tooltip": "",
                 "visible": true,
                 "format": null,
                 "stringFieldOption": "text-box"
               },
   
               {
                 "fieldName": "GIS_ACRES",
                 "label": "Acres",
                 "isEditable": true,
                 "tooltip": "",
                 "visible": true,
                 "format": {
                   "places": 2,
                   "digitSeparator": true
                 },
   
                 "stringFieldOption": "text-box"
               }
             ]
           }]
         }
   

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2. Create an openspaces FeatureLayer. Set the url, outFields, and popupTemplate properties before adding openspaces to the map. The FeatureLayer will autocast the popupTemplate to create a class instance of the object.

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                 "stringFieldOption": "text-box"
               }
             ]
           }]
         }
   
         const openspaces = new FeatureLayer({
           url: "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Parks_and_Open_Space_Styled/FeatureServer/0",
           outFields: ["TYPE","PARK_NAME", "AGNCY_NAME","ACCESS_TYP","GIS_ACRES","TRLS_MI","TOTAL_GOOD","TOTAL_FAIR", "TOTAL_POOR"],
           popupTemplate: popupOpenspaces
         });
   
         map.add(openspaces,0);
   

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Run the App

In CodePen, run your code to display the map.

Click on different park areas to display a pop-up of a table view with the fields and values you specified. You should be able to click all of the features in the map and view a pop-up. Each pop-up will display feature attributes in a unique way.

What's next?

Learn how to use additional API features and ArcGIS services in these tutorials:

• Style a feature layer
• Add a feature layer
• Import data as a feature layer