Fiber cleanup fixes

packages/react-art/src/ReactARTHostConfig.js

@@ -403,6 +403,12 @@ export function commitUpdate(
   instance._applyProps(instance, newProps, oldProps);
 }
 
+export function commitUnmount(
+  domElement: Instance,
+): void {
+  // Noop
+}
+
 export function hideInstance(instance) {
   instance.hide();
 }

packages/react-dom/src/client/ReactDOMComponentTree.js

@@ -183,6 +183,12 @@ export function getNodeFromInstance(inst: Fiber): Instance | TextInstance {
   invariant(false, 'getNodeFromInstance: Invalid argument.');
 }
 
+export function cleanupNode(node) {
+  node[internalInstanceKey] = null;
+  node[internalEventHandlersKey] = null;
+  node[internalContainerInstanceKey] = null;
+}
+
 export function getFiberCurrentPropsFromNode(
   node: Instance | TextInstance | SuspenseInstance,
 ): Props {

packages/react-dom/src/client/ReactDOMHostConfig.js

@@ -25,6 +25,7 @@ import {
   getFiberFromScopeInstance,
   getInstanceFromNode as getInstanceFromNodeDOMTree,
   isContainerMarkedAsRoot,
+  cleanupNode,
 } from './ReactDOMComponentTree';
 import {hasRole} from './DOMAccessibilityRoles';
 import {
@@ -428,6 +429,12 @@ export function commitUpdate(
   updateProperties(domElement, updatePayload, type, oldProps, newProps);
 }
 
+export function commitUnmount(
+  domElement: Instance,
+): void {
+  cleanupNode(domElement);
+}
+
 export function resetTextContent(domElement: Instance): void {
   setTextContent(domElement, '');
 }

packages/react-native-renderer/src/ReactNativeHostConfig.js

@@ -356,6 +356,12 @@ export function commitUpdate(
   }
 }
 
+export function commitUnmount(
+  domElement: Instance,
+): void {
+  // Noop
+}
+
 export function insertBefore(
   parentInstance: Instance,
   child: Instance | TextInstance,

packages/react-reconciler/src/ReactFiberCommitWork.new.js

@@ -98,6 +98,7 @@ import {
   supportsHydration,
   commitMount,
   commitUpdate,
+  commitUnmount as commitHostUnmount,
   resetTextContent,
   commitTextUpdate,
   appendChild,
@@ -1060,6 +1061,15 @@ function commitUnmount(
     }
     case HostComponent: {
       safelyDetachRef(current, nearestMountedAncestor);
+      if (commitHostUnmount) {
+        commitHostUnmount(current.stateNode);
+      }
+      return;
+    }
+    case HostText: {
+      if (commitHostUnmount) {
+        commitHostUnmount(current.stateNode);
+      }
       return;
     }
     case HostPortal: {

packages/react-reconciler/src/ReactFiberCommitWork.old.js

@@ -87,6 +87,7 @@ import {
   supportsHydration,
   commitMount,
   commitUpdate,
+  commitUnmount as commitHostUnmount,
   resetTextContent,
   commitTextUpdate,
   appendChild,
@@ -918,6 +919,15 @@ function commitUnmount(
     }
     case HostComponent: {
       safelyDetachRef(current);
+      if (commitHostUnmount) {
+        commitHostUnmount(current.stateNode);
+      }
+      return;
+    }
+    case HostText: {
+      if (commitHostUnmount) {
+        commitHostUnmount(current.stateNode);
+      }
       return;
     }
     case HostPortal: {

packages/react-test-renderer/src/ReactTestHostConfig.js

@@ -240,6 +240,12 @@ export function commitUpdate(
   instance.props = newProps;
 }
 
+export function commitUnmount(
+  domElement: Instance,
+): void {
+  // Noop
+}
+
 export function commitMount(
   instance: Instance,
   type: string,