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

You need a free ArcGIS developer account to access your dashboard and API keys. The API key must be scoped to access the services used in this tutorial.

Steps

Create a new pen

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

Set the API key

To access ArcGIS location services, you need an API key.

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

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

    Change line
                                                             
    <!DOCTYPE html>
    <html>
    
    <head>
      <meta charset="utf-8">
      <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
      <title>Esri Leaflet</title>
    
      <!-- Load Leaflet from CDN -->
      <link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css"
        integrity="sha512-xodZBNTC5n17Xt2atTPuE1HxjVMSvLVW9ocqUKLsCC5CXdbqCmblAshOMAS6/keqq/sMZMZ19scR4PsZChSR7A=="
        crossorigin=""/>
      <script src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"
        integrity="sha512-XQoYMqMTK8LvdxXYG3nZ448hOEQiglfqkJs1NOQV44cWnUrBc8PkAOcXy20w0vlaXaVUearIOBhiXZ5V3ynxwA=="
        crossorigin=""></script>
    
      <!-- Load Esri Leaflet from CDN -->
      <script src="https://unpkg.com/esri-leaflet@3.0.0/dist/esri-leaflet.js"></script>
      <script src="https://unpkg.com/esri-leaflet-vector@3.0.0/dist/esri-leaflet-vector.js"></script>
    
      <style>
        body { margin:0; padding:0; }
        #map {
            position: absolute;
            top:0;
            bottom:0;
            right:0;
            left:0;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 14px;
            color: #323232;
          }
      </style>
    
    </head>
    
    <body>
      <div id="map"></div>
    
      <script>
    
        const apiKey = "YOUR-API-KEY";
        const basemapEnum = "ArcGIS:Streets";
    
        const map = L.map('map', {
          minZoom: 2
        }).setView([34.02,-118.805], 13);
    
        L.esri.Vector.vectorBasemapLayer(basemapEnum, {
          apiKey: apiKey
        }).addTo(map);
    
      </script>
    
    </body>
    
    </html>

Show a pop-up

Add the following code to add a feature layer to the map and setup a pop-up for the Trailheads layer.

Add line.Add line.Add line.Add line.Add line.Add line.Add line.Add line.Add line.
                                                                        
<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
  <title>Esri Leaflet</title>

  <!-- Load Leaflet from CDN -->
  <link rel="stylesheet" href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css"
    integrity="sha512-xodZBNTC5n17Xt2atTPuE1HxjVMSvLVW9ocqUKLsCC5CXdbqCmblAshOMAS6/keqq/sMZMZ19scR4PsZChSR7A=="
    crossorigin=""/>
<script src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"
    integrity="sha512-XQoYMqMTK8LvdxXYG3nZ448hOEQiglfqkJs1NOQV44cWnUrBc8PkAOcXy20w0vlaXaVUearIOBhiXZ5V3ynxwA=="
    crossorigin=""></script>

  <!-- Load Esri Leaflet from CDN -->
  <script src="https://unpkg.com/esri-leaflet@3.0.0/dist/esri-leaflet.js"></script>
  <script src="https://unpkg.com/esri-leaflet-vector@3.0.0/dist/esri-leaflet-vector.js"></script>

  <style>
    body { margin:0; padding:0; }
    #map {
      position: absolute;
      top:0;
      bottom:0;
      right:0;
      left:0;
      font-family: Arial, Helvetica, sans-serif;
      font-size: 14px;
      color: #323232;
    }
  </style>

</head>

<body>

  <div id="map"></div>

  <script>

    const apiKey = "YOUR-API-KEY";
    const basemapEnum = "ArcGIS:Streets";


    const map = L.map('map', {
      minZoom: 2
    }).setView([34.02,-118.805], 13);


    L.esri.Vector.vectorBasemapLayer(basemapEnum, {
      apiKey: apiKey
    }).addTo(map);



    // Add the Feature Layer to the map
    var trailheads = L.esri.featureLayer({
      url: "https://services3.arcgis.com/GVgbJbqm8hXASVYi/arcgis/rest/services/Trailheads_Styled/FeatureServer/0"
    }).addTo(map);

    // Setup the Popup
    trailheads.bindPopup(function (layer) {
      return L.Util.template('<b>{TRL_NAME}</b><br>{PARK_NAME}</br>', layer.feature.properties);
    });

  </script>

</body>

</html>

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?