Add query param to close sidebar

The sidebar is open by default on large devices, but now we can link to
a fullscreen map for a more immersive experience.

Requested-By: Eric Villnow <eric@vill.now>

main.js

@@ -132,6 +132,10 @@ for (let category of layerCategories) {
 const urlParams = qs.parse(window.location.search, { ignoreQueryPrefix: true });
 const urlLayers = ('layer' in urlParams) ? (typeof urlParams.layer === 'string' ? [urlParams.layer] : urlParams.layer) : [];
 
+if (urlLayers.length > 0) {
+  // Disable default-enabled layers if we're selecting layers via query params
+  layerCategories.forEach(c => c.layers.forEach(l => l.enabled = false));
+}
 for (let category of layerCategories) {
   for (let layer of category.layers) {
     if (urlLayers.includes(layer.name)) {
@@ -149,6 +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 = `