Fix rootElement.getAttribute error (#812)

Closes #775
emberjs · May 31, 2018 · 9e41ce1 · 9e41ce1
1 parent bda1280
commit 9e41ce1
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/ember_debug/libs/glimmer-tree.js b/ember_debug/libs/glimmer-tree.js
@@ -141,7 +141,9 @@ export default class {
 
     // set root element's id
     let rootElement = this.elementForRoot();
-    outletTree.value.elementId = rootElement.getAttribute('id');
+    if (rootElement instanceof HTMLElement) {
+      outletTree.value.elementId = rootElement.getAttribute('id');
+    }
     outletTree.value.tagName = 'div';
 
     return outletTree;