diff --git a/main.js b/main.js
index 9e6f10f..9de4638 100644
--- a/main.js
+++ b/main.js
@@ -153,6 +153,10 @@ for (let category of layerCategories) {
     }
   }
 }
+const sidebarVisible = ('sidebar' in urlParams) ? (urlParams.sidebar !== 'false') : true;
+if (!sidebarVisible) {
+  document.body.classList.remove("nav-open");
+}
 
 const customLayerDiv = document.createElement("div");
 customLayerDiv.innerHTML = `