diff --git a/src/mapml-viewer.js b/src/mapml-viewer.js
index 2557901a1..ae5168ece 100644
--- a/src/mapml-viewer.js
+++ b/src/mapml-viewer.js
@@ -124,6 +124,9 @@ export class MapViewer extends HTMLElement {
     `:host([frameborder="0"]) {` +
     `border-width: 0;` +
     `}` +
+    `:host([hidden]) {` +
+    `display: none!important;` +
+    `}` +
     `:host .mapml-contextmenu,` +
     `:host .leaflet-control-container {` +
     `visibility: hidden!important;` + // Visibility hack to improve percieved performance (mitigate FOUC) – visibility is unset in mapml.css! (https://github.com/Maps4HTML/Web-Map-Custom-Element/issues/154).
diff --git a/src/web-map.js b/src/web-map.js
index 886b0c339..7d6cf6c2d 100644
--- a/src/web-map.js
+++ b/src/web-map.js
@@ -133,6 +133,9 @@ export class WebMap extends HTMLMapElement {
     `[is="web-map"][frameborder="0"] {` +
   	`border-width: 0;` +
   	`}` +
+    `[is="web-map"][hidden] {` +
+    `display: none!important;` +
+    `}` +
     `[is="web-map"] .mapml-web-map {` +
     `display: contents;` + // This div doesn't have to participate in layout by generating its own box.
     `}`;