Merge pull request #3187 from Geoportail-Luxembourg/fix_reverse

If a map is initializated with an height of 0 then force the map refr…

geoportal/jsapi/src/map.js

@@ -464,6 +464,11 @@ class Map extends OpenLayersMap {
       'public.lu', 'etat.lu', 'inondations.lu', 'visit-fouhren.lu', 'visit-hoscheid.lu', 'visitjunglinster.lu', 'visitreisdorf.lu', 'visitrosportmompach.lu',
       'mae.lu', 'gouvernement.lu', 'meteolux.lu', 'luxemburg.infomax.online'];
 
+    /**
+     * @private
+     */
+     this.resizeObserver_ = undefined;
+
     /**
      * @private
      * @type {boolean}
@@ -713,6 +718,31 @@ class Map extends OpenLayersMap {
         options.callback.call(this);
       }.bind(this));
     }
+    /**
+     * @private
+     * @type {function()}
+     */
+    this.cbResize_ = function(entries) {
+      for (let entry of entries) {
+        if (entry.contentRect.width > 0 &&
+            entry.contentRect.height > 0) {
+                this.updateSize();
+                if (this.resizeObserver_ !== undefined) {
+                    this.resizeObserver_.unobserve(this.getTargetElement());
+                    this.resizeObserver_ = undefined;
+                }
+            }
+      }
+    }
+    try {
+        if (this.getTargetElement().clientHeight == 0 ||
+            this.getTargetElement().clientWidth == 0) {
+            this.resizeObserver_ = new ResizeObserver(this.cbResize_.bind(this));
+            this.resizeObserver_.observe(this.getTargetElement())
+        }
+    } catch(e) {
+        console.log(e);
+    }
   }
 
   /**