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HTML 

              
                <html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
    <title>Old master v1</title>

    <style>
      html,
      body,
      #viewDiv {
        padding: 0;
        margin: 0;
        height: 100%;
        width: 100%;
      }
      #info {
        background-color: black;  
        opacity: 0.75;
        color: orange;
        font-size: 15pt;
        padding: 8px;
        visibility: hidden;
      }
      #controls {
        width: 240px;
        padding: 0px 5px 0px 5px;
          }
       .esri-button {
        margin: 5px 0px 5px 0px;
          }
      
    </style>

    <link rel="stylesheet" href="https://js.arcgis.com/4.22/esri/themes/light/main.css" />
    <script src="https://js.arcgis.com/4.22/"></script>

    <script> //Modules - the entries in 'require' and 'function' must be in the same order
      require([
        "esri/config",
        "esri/Map",
        "esri/views/MapView",
        "esri/layers/FeatureLayer",
        "esri/widgets/Search",
        "esri/widgets/Locate",
        "esri/Graphic",
        "esri/PopupTemplate"
      ],
      function (
        esriConfig,
        Map,
        MapView,
        FeatureLayer,
        Search,
        Locate,
        Graphic,
        PopupTemplate
      
      ) {
        
        esriConfig.apiKey = "AAPKb0d58e35211c4d68a94b36b16d469ec7TVe5HESpcrOBiKcHTTZkbOrcyOMR4YlWsOOkJczMMB63FBVGN4XUDWjzldbHRpha"; //Our API Key
        
          const map = new Map({
          basemap: "osm-standard" // Basemap layer service
          });
        
        const view = new MapView({
          container: "viewDiv",
          map: map,
          center: [-0.435093,53.841965], // Map centre, Longitude, latitude
          zoom: 10,
          highlightOptions: {
            color: "orange"  //Colour of feature highlight
          }
        });
        
        
      // Define a pop-up for Streets layer
      const popupStreets = {
        "title": "Streets",
        "content": "<b>USRN:</b> {SITE_CODE}<br><b>Street Name:</b> {SITE_NAME}<br><b>Town Name:</b> {TOWN_NAME}"
      }
            
       // Streets feature layer
      const streetLayer = new FeatureLayer({
          url: "https://services6.arcgis.com/Qptn479QktK11k72/arcgis/rest/services/New_Achieve_Streets_layer/FeatureServer/0",
          outFields: ["*"],
          popupTemplate: popupStreets
          });

        map.add(streetLayer, 0); //Adds Streets layer to map
        
       
      view.popup.autoOpenEnabled = true;
      view.on("click", (event) => {
      // Get the coordinates of the click on the view
      // around the decimals to 3 decimals
      const x = Math.round(event.mapPoint.x * 1) / 1;
      const y = Math.round(event.mapPoint.y * 1) / 1;
        
  view.popup.open({
    // Set the popup's title to the coordinates of the clicked location
    title: "X, Y Coordinates: [" + x + ", " + y + "]",
    location: event.mapPoint // Set the location of the popup to the clicked location
    
  }); 
       view.popup.content = "TEST", view.popupTemplate
     
});
                    
                
      const search = new Search({  //Search widget
      view: view
    });

        view.ui.add(search, "top-right"); //Adds Search widget to the map
       
        const locate = new Locate({ //Locate widget
          view: view,
          useHeadingEnabled: false,
          goToOverride: function(view, options) {
            options.target.scale = 1500;
            return view.goTo(options.target);
          }
        });
        
        view.ui.add(locate, "top-left"); //Adds Locate widget to the map
          
        view.ui.add("info", "bottom-right");  //Adds Info box to map - box reference in Style
              
        view
          .when()
          .then(() => {
            return streetLayer.when();
          })
          .then((layer) => {
            const renderer = layer.renderer.clone();
            renderer.symbol.width = 20;
            renderer.symbol.color = [128, 128, 128, 0.1];
            layer.renderer = renderer;

          // Set up an event handler pointer-move events (mouse)
            // and retrieve the screen x, y coordinates

            return view.whenLayerView(layer);
        })
            .then((layerView) => {
            view.on("pointer-move", eventHandler);
           
            function eventHandler(event) {
              // only include graphics from streetLayer in the hitTest
              const opts = {
                include: streetLayer
              }
              // the hitTest() checks to see if any graphics from the streetLayer
              // intersect the x, y coordinates of the pointer
              view.hitTest(event, opts).then(getGraphics);
            }

            var highlight, currentName;

            function getGraphics(response) {
              // the topmost graphic from the streetsLayer
              // and display select attribute values from the
              // graphic to the user
              
              if (response.results.length) {
                const graphic = response.results[0].graphic;

                const attributes = graphic.attributes;
                const town = attributes.TOWN_NAME;
                const usrn = attributes.SITE_CODE;
                const name = attributes.SITE_NAME;
                const id = attributes.OBJECTID;
                

                if ( highlight && currentName !== usrn) {
                  highlight.remove();
                  highlight = null;
                  return;
                }

                if (highlight) {
                  return;
                }

                document.getElementById("info").style.visibility = "visible";
                document.getElementById("name").innerHTML = "Street: " + name;
                document.getElementById("town").innerHTML = "Town: " + town;
                document.getElementById("usrn").innerHTML = "USRN: " + usrn;

                // highlight all features belonging to the same street as the feature
                // returned from the hitTest
                const query = layerView.createQuery();
                query.where = "SITE_CODE = '" + usrn + "'";
                layerView.queryObjectIds(query).then((ids) => {
                  if (highlight) {
                    highlight.remove()
                  }
                  highlight = layerView.highlight(ids);
                  currentName = usrn;
                });
              } else {
                // remove the highlight if no features are
                // returned from the hitTest
                if (highlight){
                  highlight.remove();
                  highlight = null;
                }
                document.getElementById("info").style.visibility = "hidden";
              }
           }
          });
        
        view.on("click", function (evt) {
          // Create a graphic and add the geometry and symbol to it
          var graphic = new Graphic({
            geometry: {
              type: "point",
              latitude: evt.mapPoint.latitude,
              longitude: evt.mapPoint.longitude,
              spatialReference: view.spatialReference,
            },
            symbol: {
              type: "simple-marker", // autocasts as new SimpleFillSymbol
              color: [255, 10, 10],
              outline: {
                // autocasts as new SimpleLineSymbol()
                color: [255, 255, 255],
                width: 2,
              },
            },
          });
          view.graphics.removeAll();
          view.graphics.add(graphic);
          });
          
        
        view.ui.add(document.getElementById("controls"), "top-right");   //Adds Reset graphics control to the map
        
        document.getElementById("reset").addEventListener("click", resetGraphics);
        
        function resetGraphics() {
              view.graphics.removeAll();
              
            }
                        
      });
    </script>
  </head>

  <body>
    <div id="viewDiv"></div>
    <div id="info">
      <span id="name"></span> <br />
      <span id="town"></span> <br />
      <span id="usrn"></span>
      
      <div id="controls" class="esri-widget">
       <button id="reset" class="esri-button esri-button--secondary">Remove drop pin</button>
      </div>
  </body>
</html>
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