Set role="application" (#467)

Author: Malvoz

src/mapml-viewer.js

@@ -219,7 +219,9 @@ export class MapViewer extends HTMLElement {
 
           this.setControls(false,false,true);
           this._crosshair = M.crosshair().addTo(this._map);
-    
+          
+          // https://github.com/Maps4HTML/Web-Map-Custom-Element/issues/274
+          this.setAttribute('role', 'application');
           // Make the Leaflet container element programmatically identifiable
           // (https://github.com/Leaflet/Leaflet/issues/7193).
           this._container.setAttribute('role', 'region');

src/web-map.js

@@ -254,6 +254,8 @@ export class WebMap extends HTMLMapElement {
             this.poster.style.display = 'none';
           }
 
+          // https://github.com/Maps4HTML/Web-Map-Custom-Element/issues/274
+          this.setAttribute('role', 'application');
           // Make the Leaflet container element programmatically identifiable
           // (https://github.com/Leaflet/Leaflet/issues/7193).
           this._container.setAttribute('role', 'region');