Observe childList (added nodes) before attribute changes

Author: smnandre

src/StimulusBundle/assets/src/loader.ts

@@ -83,6 +83,11 @@ class StimulusLazyControllerHandler {
         new MutationObserver((mutationsList) => {
             for (const { attributeName, target, type } of mutationsList) {
                 switch (type) {
+                    case 'childList': {
+                        this.lazyLoadExistingControllers(target as Element);
+                        break;
+                    }
+                    
                     case 'attributes': {
                         if (
                             attributeName === controllerAttribute &&
@@ -92,12 +97,6 @@ class StimulusLazyControllerHandler {
                                 this.loadLazyController(controllerName)
                             );
                         }
-
-                        break;
-                    }
-
-                    case 'childList': {
-                        this.lazyLoadExistingControllers(target as Element);
                     }
                 }
             }