Display a pop-up

Learn how to display feature attributes in a pop-up.

A pop-up, also known as a "popup", is a visual element that displays information about a feature when it is clicked. You typically style and configure a pop-up using HTML and CSS for each layer in a map. Pop-ups can display attribute values, calculated values, or rich content such as images, charts, or videos.

In this tutorial, you create an interactive pop-up for the Trailheads feature layer in the Santa Monica Mountains. When a feature is clicked, a pop-up is displayed containing the name of the trail and the service that manages it.

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 location services, you need an API key or OAuth 2.0 access token. To learn how to create and scope your key, visit the Create an API key tutorial.

1. Go to your dashboard to get an API key. The API key must be scoped to access the services used in this tutorial.

2. In CodePen, update apiKey to use your key.

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         const map = L.map("map", {
           minZoom: 2
         })
   
         map.setView([34.02, -118.805], 13);
   
         const apiKey = "YOUR_API_KEY";
   
         const basemapEnum = "arcgis/streets";
   
         L.esri.Vector.vectorBasemapLayer(basemapEnum, {
           apiKey: apiKey
         }).addTo(map);
   

Add the trailheads layer

Use the FeatureLayer class to display the Trailheads layer on your map.

1. Create a FeatureLayer and set the url property to access the feature service.

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         L.esri.Vector.vectorBasemapLayer(basemapEnum, {
           apiKey: apiKey
         }).addTo(map);
   
         var trailheads = L.esri
           .featureLayer({
             url: "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Trailheads_Styled/FeatureServer/0"
           })
           .addTo(map);
   

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Display a pop-up

Use the bindPopup method to display the attribute information of the trailheads layer.

1. Append the bindPopup method to the trailheads layer and pass in a function to return the attribute information of the layer.

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         var trailheads = L.esri
           .featureLayer({
             url: "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Trailheads_Styled/FeatureServer/0"
           })
           .addTo(map);
   
         trailheads.bindPopup(function (layer) {
   
         });
   

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2. Set the pop-up contents to display information about the trail and park name.

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         var trailheads = L.esri
           .featureLayer({
             url: "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Trailheads_Styled/FeatureServer/0"
           })
           .addTo(map);
   
         trailheads.bindPopup(function (layer) {
   
           return L.Util.template("<b>{TRL_NAME}</b><br>{PARK_NAME}</br>", layer.feature.properties);
   
         });
   

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Run the app

In CodePen, run your code to display the map.

The map view should display the Trailheads feature layer. When you click a feature, the name of the trailhead and its park name is displayed in a pop-up.

What's next?

Learn how to use additional ArcGIS location services in these tutorials: