Move instantiation of firestore to prevent race-problems.

Author: Scarygami

firestore-element.html

@@ -131,10 +131,11 @@
         super();
         this._firestoreProps = {};
         this._firestoreListeners = {};
-        this.db = this.constructor.db || firebase.firestore();
       }
 
       connectedCallback() {
+        super.connectedCallback();
+        this.db = this.constructor.db || firebase.firestore();
         const props = collect(this.constructor, 'properties');
         for (let name in props) {
           if (props[name].doc) {
@@ -143,7 +144,6 @@
             this._firestoreBind('collection', props[name].collection, name, props[name].live, props[name].observes);
           }
         }
-        super.connectedCallback();
       }
 
       _firestoreBind(type, path, name, live = false, observes = []) {
@@ -205,7 +205,7 @@
           delete this._firestoreListeners[name];
         }
       }
-    }
-  }
+    };
+  };
 })(window);
 </script>