config[overpassUrl] can be an array (1st entry will be used)

conf.php-dist

@@ -6,7 +6,10 @@ $config['categoriesDir'] = 'node_modules/openstreetbrowser-categories-main';
 $config['categoriesAlwaysReload'] = true;
 
 // URL of the Overpass API
-$config['overpassUrl'] = '//overpass-api.de/api/interpreter';
+$config['overpassUrl'] = array(
+  '//overpass-api.de/api/interpreter',
+  '//api.openstreetmap.fr/oapi/interpreter',
+);
 
 // Location of the initial view if no IP-location can be resolved. 'zoom' is optional.
 $config['defaultView'] = array('lat' => 51.505, 'lon' => -0.09, 'zoom' => 18);

src/index.js

@@ -12,6 +12,7 @@ require('./CategoryOverpass')
 
 global.map
 window.baseCategory
+window.overpassUrl
 
 // Optional modules
 require('./options')
@@ -43,7 +44,14 @@ function onload2 () {
     showPopup: false
   }).addTo(map);
 
-  overpassFrontend = new OverpassFrontend(config.overpassUrl, {
+  if (typeof overpassUrl === 'undefined') {
+    overpassUrl = config.overpassUrl
+    if (Array.isArray(overpassUrl) && overpassUrl.length) {
+      overpassUrl = overpassUrl[0]
+    }
+  }
+
+  overpassFrontend = new OverpassFrontend(overpassUrl, {
     timeGap: 10,
     effortPerRequest: 100
   })