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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>Intro to MapView - Create a 2D map - 4.12</title>

    <link rel="stylesheet" href="https://js.arcgis.com/4.12/esri/themes/light/main.css"/>
    <script src="https://js.arcgis.com/4.12/"></script>
  </head>

  <body>
  <div id="viewDiv"></div>
  <div id="containerDiv" class="esri-widget">
    <div><span id="title"></span></div>
    <div><span id="description">Each feature is 1 square km</span></div>
      <div id="histogramDiv"></div>
      <div class="horizontalLabels esri-widget">
        <span style="float: left" id="minLabel"></span>
        <span style="float: right" id="maxLabel"></span>
      </div>
  </div>
  </body>
</html>
!

CSS 

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

#containerDiv {
  background-color:#cfcfcf;
  padding: 10px;
  padding-right: 15px;
  text-align: center;
  width: 300px;
}

#histogramDiv {
  width: 100%;
  height: 200px;
  float:right;
  background: rgba(0,0,0,0);
}

#title{
  font-size: 16.38px;
  font-weight: 700;
}

#description{
  font-size: 14px;
  font-weight: 100;
}
!

JS 

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

  const field = "MEDHINC_CY";

  const layer = new FeatureLayer({
    url: "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/California_Housing_and_Population_Stats_by_1km/FeatureServer/0",
    definitionExpression: "MEDHINC_CY > 0",
    title: "Income in Southern California",
    renderer: {
      type: "simple",
      label: "Each feature is 1 square km",
      symbol: {
        type: "simple-fill",
        outline: {
          color: [153,153,153,0.25],
          width: 0.375
        }
      },
      visualVariables: [{
        type: "color",
        field: field,
        legendOptions: {
          title: "Median Household Income"
        },
        stops: [
          { value: 30000, color: "rgba(237, 248, 251, 1)", label: "< $30,000" },
          { value: 60000, color: "rgba(179, 205, 227, 1)", label: "" },
          { value: 85000, color: "rgba(140, 150, 198, 1)", label: "$85,000" },
          { value: 120000, color: "rgba(136, 86, 167, 1)", label: "" },
          { value: 180000, color: "rgba(129, 15, 124, 1)", label: "> $180,000" }
        ]
      }]
    },
    popupEnabled: false
  });

  const map = new Map({
    basemap: {
      portalItem: {
        id: "3582b744bba84668b52a16b0b6942544"
      }
    },
    layers: [layer]
  });

  const view = new MapView({
    container: "viewDiv",
    map: map,
    scale: 577790,
    center: [-117.8099, 34.0441],
    highlightOptions: {
      color: "black"
    }
  });

});
!
999px

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