Bridgeless mode: Reflect, Proxy doesn't exist

[farwayer]

Description

After enabling bridgeless mode Reflect, Proxy became unavailable for some season

Steps to reproduce

1. default project init
2. enabled new arch
3. enable bridgeless mode
4. add Reflect/Proxy reference: new Proxy({}, {}) for example

React Native Version

0.73.6

Affected Platforms

Runtime - Android, Runtime - iOS

Areas

Bridgeless - The New Initialization Flow

Output of npx react-native info

System:
 OS: Linux
 CPU: x64 Intel
 Memory: 3.89 GB / 15.31 GB
Binaries:
 Node:
 version: 21.7.0
 Yarn:
 version: 1.22.21
 npm:
 version: 10.5.0
 Watchman: Not Found
SDKs:
 Android SDK:
 Android NDK: 25.2.9519653
IDEs:
 Android Studio: Not Found
Languages:
 Java:
 version: 17.0.10
 path: /usr/bin/javac
 Ruby:
 version: 3.0.6
 path: /usr/bin/ruby
npmPackages:
 "@react-native-community/cli": Not Found
 react:
 installed: 18.2.0
 wanted: 18.2.0
 react-native:
 installed: 0.73.6
 wanted: 0.73.6
npmGlobalPackages:
 "*react-native*": Not Found
Android:
 hermesEnabled: true
 newArchEnabled: true
iOS:
 hermesEnabled: Not found
 newArchEnabled: false

Stacktrace or Logs

(NOBRIDGE) ERROR ReferenceError: Property 'Proxy' doesn't exist

This error is located at:
 in Section (created by App)
 in RCTView (created by View)
 in View (created by App)
 in RCTView (created by View)
 in View (created by ScrollView)
 in RCTScrollView (created by ScrollView)
 in ScrollView (created by ScrollView)
 in ScrollView (created by App)
 in RCTView (created by View)
 in View (created by App)
 in App
 in RCTView (created by View)
 in View (created by AppContainer)
 in RCTView (created by View)
 in View (created by AppContainer)
 in AppContainer
 in AwesomeProject(RootComponent)

Reproducer

https://github.com/farwayer/rn-bridgeless-no-proxy

Screenshots and Videos

No response

[cortinico]

Thanks for reporting this @farwayer, we'll address this in 0.74

[mrousavy]

Not sure if this is supported by Hermes, but WeakRef also doesn't work.
I'm guessing this is either related to this issue, or just not yet implemented :)

(rn 0.74 rc)

[fkgozali]

FYI, this should be fixed with #43538. We're gonna pick this into 0.74-stable branch

[cortinico]

Closing as this has been fixed in 0.74. It's currently available in RC6