esri-loader 4.x区域地图按需选择：新特性与使用示例

样例

vue写法

<template>  <div id="SceneView"></div></template> <script>import { loadModules } from "esri-loader"; export default {  data() {    return {};  },  mounted() {    this.createView();  },  methods: {    //创建视图    createView() {      let options = {        url: "https://js.arcgis.com/4.15/",        css: "https://js.arcgis.com/4.15/esri/themes/light/main.css"      };       loadModules(        [          "esri/Map",          "esri/layers/FeatureLayer",          "esri/views/MapView",          "esri/widgets/Legend"        ],        options      ).then(([Map, FeatureLayer, MapView, Legend]) => {        let map = new Map({          basemap: "gray-vector"        });         var view = new MapView({          container: "SceneView",          map: map,          center: [-73.95, 40.702],          zoom: 10        });        view.ui.add(new Legend({ view: view }), "bottom-left");         var template = {          // autocasts as new PopupTemplate()          title: "{NAME} in {COUNTY}",          content: [            {              // It is also possible to set the fieldInfos outside of the content              // directly in the
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