diff --git a/docs/src/demos/Guide/NodeViews/JavaScriptContent/Extension.js b/docs/src/demos/Guide/NodeViews/JavaScriptContent/Extension.js
index d4faebe1..0fc4e469 100644
--- a/docs/src/demos/Guide/NodeViews/JavaScriptContent/Extension.js
+++ b/docs/src/demos/Guide/NodeViews/JavaScriptContent/Extension.js
@@ -16,7 +16,7 @@ export default Node.create({
   },
 
   renderHTML({ HTMLAttributes }) {
-    return ['node-view', mergeAttributes(HTMLAttributes)]
+    return ['node-view', mergeAttributes(HTMLAttributes), 0]
   },
 
   addNodeView() {
diff --git a/docs/src/demos/Guide/NodeViews/ReactComponentContent/Extension.js b/docs/src/demos/Guide/NodeViews/ReactComponentContent/Extension.js
index b02d4d64..90a92887 100644
--- a/docs/src/demos/Guide/NodeViews/ReactComponentContent/Extension.js
+++ b/docs/src/demos/Guide/NodeViews/ReactComponentContent/Extension.js
@@ -18,7 +18,7 @@ export default Node.create({
   },
 
   renderHTML({ HTMLAttributes }) {
-    return ['react-component', mergeAttributes(HTMLAttributes)]
+    return ['react-component', mergeAttributes(HTMLAttributes), 0]
   },
 
   addNodeView() {
diff --git a/docs/src/demos/Guide/NodeViews/VueComponentContent/Extension.js b/docs/src/demos/Guide/NodeViews/VueComponentContent/Extension.js
index 6cd5ed7c..8fbfbdb6 100644
--- a/docs/src/demos/Guide/NodeViews/VueComponentContent/Extension.js
+++ b/docs/src/demos/Guide/NodeViews/VueComponentContent/Extension.js
@@ -18,7 +18,7 @@ export default Node.create({
   },
 
   renderHTML({ HTMLAttributes }) {
-    return ['vue-component', mergeAttributes(HTMLAttributes)]
+    return ['vue-component', mergeAttributes(HTMLAttributes), 0]
   },
 
   addNodeView() {