JSFiddle - React, Tailwind, and code Playground

by Alex Azuero

HTML

<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
  <title>Layer Swipe</title>
  <link rel="stylesheet" href="https://js.arcgis.com/3.27/esri/themes/calcite/dijit/calcite.css">
  <link rel="stylesheet" href="https://js.arcgis.com/3.27/esri/themes/calcite/esri/esri.css">
  <style>
    html, body, #map {
      padding:0;
      margin:0;
      height:100%;
      position:relative;
    }
  </style>
  <script src="https://js.arcgis.com/3.27/"></script>
  <script>

    require([
      "esri/map", 
      "esri/dijit/LayerSwipe",
      "esri/arcgis/utils",
      "dojo/_base/array",
      "dojo/domReady!"
    ], function(
      Map, LayerSwipe, arcgisUtils, array 
    )  {

      var mapDeferred = arcgisUtils.createMap("62702544d70648e593bc05d65180fd64", "map");
      mapDeferred.then(function(response){

        var id;
        var map = response.map;
        var title = "2009 Obesity Rates";
        
        //loop through all the operational layers in the web map 
        //to find the one with the specified title;
        var layers = response.itemInfo.itemData.operationalLayers;
        array.some(layers, function(layer){
          if(layer.title === title){
            id = layer.id;
            if(layer.featureCollection && layer.featureCollection.layers.length){
              id = layer.featureCollection.layers[0].id;
            }
            return true;  
          }else{
            return false;
          }
        });
        //get the layer from the map using the id and set it as the swipe layer. 
        if(id){
          var swipeLayer = map.getLayer(id);
          var swipeWidget = new LayerSwipe({
            type: "vertical",  //Try switching to "scope" or "horizontal"
            map: map,
            layers: [swipeLayer]
          }, "swipeDiv");
          swipeWidget.startup();
        }
      });

    });
  </script>

</head>
<body class="calcite">
  <div...