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HTML 

              
                <!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta
      name="viewport"
      content="initial-scale=1,maximum-scale=1,user-scalable=no"
    />
    <title>LI Covid-19 Cases by Town</title>
    <link rel="stylesheet" href="https://js.arcgis.com/4.14/esri/themes/light/main.css"></link>
    <script src="https://js.arcgis.com/4.14/"></script>
  </head>
  <body>
    <div id="viewDiv"></div>
    <div id="timeSlider"></div>
    <div id="titleDiv" class="esri-widget">
      <div id="titleText">Reported COVID-19 Cases by Town</div>
    </div>
  </body>
</html>
!

CSS 

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

#timeSlider {
  position: absolute;
  left: 100px;
  right: 100px;
  bottom: 20px;
}

#titleDiv {
  padding: 10px;
  font-weight: 36;
  text-align: center;
}
!

JS 

              
                
require([
  "esri/Map",
  "esri/views/MapView",
  "esri/layers/FeatureLayer",
  "esri/widgets/TimeSlider",
  "esri/widgets/Expand",
  "esri/widgets/Legend"
], function(Map, MapView, FeatureLayer, TimeSlider, Expand, Legend) {

  // Labels for covid layers, autocasted
  const labelClass = {
    symbol:{
      type: "text",
      color:"white",
      haloColor:"blue",
      haloSize: 1,
      font:{
        family: "Ubuntu Mono",
        size: 12,
        weight: "bold"
      }
    },
    labelPlacement: "always-horizontal",
    labelExpressionInfo: {
      expression: "$feature.NAME"
    }
    //where: "NAME IS NOT NULL"
  };

  // Load in LI_Towns_covCases_WGS84 from AGOL
  const townLayer = new FeatureLayer({
    portalItem:{
      id:"df383e473a4143b4a2354a8bef02fb9e"
    },
    labelingInfo: [labelClass],
    labelsVisible: true
  });


  const map = new Map({
    basemap: "satellite",
    layers: [townLayer]
  });

  const view = new MapView({
    map: map,
    container: "viewDiv",
    zoom: 10,
    center: [-73.033754, 40.851357],
  });



  // // time slider widget initialization
  const timeSlider = new TimeSlider({
    container: "timeSlider",
    mode: "cumulative-from-start",
    view: view,
    fullTimeExtent:{
      start: new Date("2020, 3, 17"),
      end: new Date("2020, 3, 28")
    },
    stops:{
      interval:{
        value: 1,
        unit: "days"
      },
      timeExtent:{
        start: new Date("2020, 3, 17"),
        end: new Date("2020, 3, 28")
      }
   }
  });

  timeSlider.watch("timeExtent", function(timeExtent){
    var day = timeSlider.timeExtent.end.getDate()
    var month = timeSlider.timeExtent.end.getMonth()
    var year = timeSlider.timeExtent.end.getFullYear()
    var date = `${month + 1}/${day}/${year}`
    var whereClause = `date = timestamp '${date}'`

    labelClass.where = whereClause

  });
  //
  //
  view.ui.add(timeSlider, "manual");
  // add the UI for titles, stats and chart.
  view.ui.add("titleDiv", "top-right");


  const legend = new Legend({
    view: view
  });
  const legendExpand = new Expand({
    expandIconClass: "esri-icon-collection",
    expandTooltip: "Legend",
    view: view,
    expanded: true,
    content: legend,
    expanded: false
  });
  view.ui.add(legendExpand, "top-left");


});
!
999px

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