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HTML 

              
                <html>
  <head>
    <meta charset="utf-8" />
    <meta
      name="viewport"
      content="initial-scale=1,maximum-scale=1,user-scalable=no"
    />
    <!-- ArcGIS Mapping APIs and Location Services Guide
  Learn more: https://developers.arcgis.com/documentation/mapping-apis-and-location-services/maps-scenes-and-layers/
-->
<title>Guide: Data Layers- GeoJSON </title>

    <style>
      html,
      body,
      #viewDiv {
        padding: 0;
        margin: 0;
        height: 100%;
        width: 100%;
      }
    </style>

    <link
      rel="stylesheet"
      href="https://js.arcgis.com/4.18/esri/themes/light/main.css"
    />
    <script src="https://js.arcgis.com/4.18/"></script>

    <script>
      require([
        "esri/config",
        "esri/Map",
        "esri/layers/GeoJSONLayer",
        "esri/views/MapView"
        
   //If GeoJSON files are not on the same domain as your website, a CORS enabled server or a proxy is required.
        
      ], function (esriConfig,Map, GeoJSONLayer, MapView) {
        
        esriConfig.apiKey = "YOUR-API-KEY";
        // Copy and paste the url to see the raw data
        const url =
          "https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_month.geojson" 
        
        // Earthquake information to appear when point is clicked
        const template = {
          title: "Earthquake Info",
          content: "Magnitude {mag} {type} hit {place} on {time}",
          fieldInfos: [
            {
              fieldName: "time",
              format: {
                dateFormat: "short-date-short-time"
              }
            }
          ]
        };

        const renderer = {
          type: "simple",
          field: "mag",
          symbol: {
            type: "simple-marker",
            color: "orange",
            outline: {
              color: "white"
            }
          },
          visualVariables: [
            {
              type: "size",
              field: "mag",
              stops: [
                {
                  value: 2.5,
                  size: "4px"
                },
                {
                  value: 8,
                  size: "40px"
                }
              ]
            }
          ]
        };

        const geojsonLayer = new GeoJSONLayer({
          url: url,
          copyright: "USGS Earthquakes",
          popupTemplate: template,
          renderer: renderer //optional
        });

        // Add the layer to a new map
        const map = new Map({
          basemap: "arcgis-light-gray",
          layers: [geojsonLayer]
        });
      
        // Add the map to a new view
        const view = new MapView({
          container: "viewDiv",
          center: [-168, 46],
          zoom: 3,
          map: map
        });
      });
    </script>
  </head>

  <body>
    <div id="viewDiv"></div>
  </body>
</html>
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