The Expand widget Content section describes that it can handle a Node, String, or Widget. So you could add text like this:
<html lang="en">
<head>
<meta charset="utf-8" />
<meta
name="viewport"
content="initial-scale=1,maximum-scale=1,user-scalable=no"
/>
<title>
Intro to FeatureLayer plus Expand Widget | ArcGIS API for JavaScript 4.25
</title>
<link
rel="stylesheet"
href="https://js.arcgis.com/4.25/esri/themes/light/main.css"
/>
<script src="https://js.arcgis.com/4.25/"></script>
<style>
html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>
<script>
require(["esri/Map", "esri/views/MapView", "esri/layers/FeatureLayer","esri/widgets/Expand"], (
Map,
MapView,
FeatureLayer,
Expand
) => {
const map = new Map({
basemap: "hybrid"
});
const view = new MapView({
container: "viewDiv",
map: map,
extent: {
// autocasts as new Extent()
xmin: -9177811,
ymin: 4247000,
xmax: -9176791,
ymax: 4247784,
spatialReference: 102100
}
});
// ** Add feature layer **
// Carbon storage of trees in Warren Wilson College.
const featureLayer = new FeatureLayer({
url: "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/Landscape_Trees/FeatureServer/0"
});
map.add(featureLayer);
// ** Add Expand Widget **
const bgExpand = new Expand({
view: view,
content: "<p style='background-color:white; width: 150px;''>This is a string to display</p>"
});
view.whenLayerView(featureLayer).then(function () {
view.ui.add(bgExpand, "top-right");
});
});
</script>
</head>
<body>
<div id="viewDiv"></div>
</body>
</html>
