arcgis js显示标注

require([
  "esri/Map",
  "esri/views/MapView",
  "esri/layers/FeatureLayer",
  "esri/renderers/SimpleRenderer",
  "esri/symbols/TextSymbol"
], function(Map, MapView, FeatureLayer, SimpleRenderer, TextSymbol) {
  var map = new Map({
    basemap: "streets-vector"
  });

  var view = new MapView({
    container: "viewDiv",
    map: map,
    center: [-118.244, 34.052],
    zoom: 12
  });

  var featureLayer = new FeatureLayer({
    url: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3",
    outFields: ["NAME"],
    labelingInfo: [{
      labelExpressionInfo: { expression: "$feature.NAME" },
      symbol: new TextSymbol({
        color: "black",
        font: { size: 12, family: "Arial" }
      })
    }],
    renderer: new SimpleRenderer({
      symbol: {
        type: "simple-marker",
        color: "red",
        size: "8px"
      }
    })
  });

  map.add(featureLayer);
});