Dara,
Here is a sample of how to do that.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta
name="viewport"
content="initial-scale=1,maximum-scale=1,user-scalable=no"
/>
<title>Mobile Popup Collapse - 4.14</title>
<style>
html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>
<link
rel="stylesheet"
href="https://js.arcgis.com/4.14/dijit/themes/claro/claro.css"
/>
<link
rel="stylesheet"
href="https://js.arcgis.com/4.14/esri/themes/light/main.css"
/>
<script src="https://js.arcgis.com/4.14/"></script>
<script>
require(["esri/Map", "esri/views/MapView", "esri/WebMap"], function(
Map,
MapView,
WebMap
) {
var webmap = new WebMap({
portalItem: {
id: "3af548bac6054938b615d08104197ba0"
}
});
var view = new MapView({
map: webmap,
container: "viewDiv"
});
popup = view.popup;
view.when(function() {
popup.watch("collapsed", function(value){
if(value && popup.currentDockPosition === 'bottom-center'){
popup.collapsed = false;
}
});
});
});
</script>
</head>
<body>
<div id="viewDiv" class="esri-widget"></div>
</body>
</html>