Align onRecoverableError callback between pages and app dir

packages/next/client/app-index.tsx

@@ -7,7 +7,7 @@ import { createFromReadableStream } from 'next/dist/compiled/react-server-dom-we
 
 import { HeadManagerContext } from '../shared/lib/head-manager-context'
 import { GlobalLayoutRouterContext } from '../shared/lib/app-router-context'
-import { NEXT_DYNAMIC_NO_SSR_CODE } from '../shared/lib/no-ssr-error'
+import onRecoverableError from './on-recoverable-error'
 
 /// <reference types="react-dom/experimental" />
 
@@ -130,23 +130,6 @@ if (document.readyState === 'loading') {
   DOMContentLoaded()
 }
 
-function onRecoverableError(err: any) {
-  // Using default react onRecoverableError
-  // x-ref: https://github.com/facebook/react/blob/d4bc16a7d69eb2ea38a88c8ac0b461d5f72cdcab/packages/react-dom/src/client/ReactDOMRoot.js#L83
-  const defaultOnRecoverableError =
-    typeof reportError === 'function'
-      ? // In modern browsers, reportError will dispatch an error event,
-        // emulating an uncaught JavaScript error.
-        reportError
-      : (error: any) => {
-          window.console.error(error)
-        }
-
-  // Skip certain custom errors which are not expected to be reported on client
-  if (err.digest === NEXT_DYNAMIC_NO_SSR_CODE) return
-  defaultOnRecoverableError(err)
-}
-
 const nextServerDataLoadingGlobal = ((self as any).__next_f =
   (self as any).__next_f || [])
 nextServerDataLoadingGlobal.forEach(nextServerDataCallback)

packages/next/client/index.tsx

@@ -43,7 +43,7 @@ import {
   PathnameContextProviderAdapter,
 } from '../shared/lib/router/adapters'
 import { SearchParamsContext } from '../shared/lib/hooks-client-context'
-import { NEXT_DYNAMIC_NO_SSR_CODE } from '../shared/lib/no-ssr-error'
+import onRecoverableError from './on-recoverable-error'
 
 /// <reference types="react-dom/experimental" />
 
@@ -507,11 +507,7 @@ function renderReactElement(
   if (!reactRoot) {
     // Unlike with createRoot, you don't need a separate root.render() call here
     reactRoot = ReactDOM.hydrateRoot(domEl, reactEl, {
-      onRecoverableError(err: any) {
-        // Skip certain custom errors which are not expected to throw on client
-        if (err.message === NEXT_DYNAMIC_NO_SSR_CODE) return
-        throw err
-      },
+      onRecoverableError,
     })
     // TODO: Remove shouldHydrate variable when React 18 is stable as it can depend on `reactRoot` existing
     shouldHydrate = false

packages/next/client/on-recoverable-error.ts

@@ -0,0 +1,18 @@
+import { NEXT_DYNAMIC_NO_SSR_CODE } from '../shared/lib/no-ssr-error'
+
+export default function onRecoverableError(err: any) {
+  // Using default react onRecoverableError
+  // x-ref: https://github.com/facebook/react/blob/d4bc16a7d69eb2ea38a88c8ac0b461d5f72cdcab/packages/react-dom/src/client/ReactDOMRoot.js#L83
+  const defaultOnRecoverableError =
+    typeof reportError === 'function'
+      ? // In modern browsers, reportError will dispatch an error event,
+        // emulating an uncaught JavaScript error.
+        reportError
+      : (error: any) => {
+          window.console.error(error)
+        }
+
+  // Skip certain custom errors which are not expected to be reported on client
+  if (err.digest === NEXT_DYNAMIC_NO_SSR_CODE) return
+  defaultOnRecoverableError(err)
+}