I am trying to figure out a good way to retrieve the fields from an ArcGIS REST service. I first create a FeatureLayer from the a feature server url. When I console.log the feature layer, I see that it has fields, but when I try to console.log(featureLayer.fields) it is just null.
I need the field information to create a popup template, but I am trying to find a way to avoid having to hard-code the field information. What is a good way of going about this?
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
html,
body,
#viewDiv {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
}
</style>
<link rel="stylesheet" href="https://js.arcgis.com/4.13/esri/css/main.css">
<script src="https://js.arcgis.com/4.13/"></script>
</head>
<body>
<div id="viewDiv"></div>
<script>
require([
"esri/Map",
"esri/views/MapView",
"esri/widgets/Legend",
"esri/PopupTemplate",
"esri/layers/FeatureLayer",
"esri/Graphic"
], function(Map, MapView, Legend, PopupTemplate, FeatureLayer, Graphic){
var map = new Map({
basemap: "gray"
});
var view = new MapView({
container: "viewDiv",
map: map
});
var featureLayer = new FeatureLayer({
url: "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/ArcGIS/rest/services/earthquakes_geojson/FeatureServer/0"
});
console.log(featureLayer);
console.log(featureLayer.fields);
map.add(featureLayer);
});
</script>
</body>
</html>