[0.77] getBoundingClientRect TypeScript type definition missing on View with New Architecture

[bryanmylee]

Description

With the introduction of New Architecture and useLayoutEffect, we can now read layout synchronously with ref.current?.getBoundingClientRect.

However, the TypeScript definition for NativeMethods does not yet include the newly supported method.

Steps to reproduce

Check the definition of NativeMethods in react-native/types/public/ReactNativeTypes.d.ts, note that getBoundingClientRect is missing.

React Native Version

0.77.1

Affected Platforms

Build - MacOS

Areas

Other (please specify)

Output of npx @react-native-community/cli info

info Fetching system and libraries information...
System:
  OS: macOS 14.5
  CPU: (12) arm64 Apple M2 Pro
  Memory: 121.22 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 18.19.0
    path: ~/.nvm/versions/node/v18.19.0/bin/node
  Yarn:
    version: 1.22.19
    path: ~/.nvm/versions/node/v18.19.0/bin/yarn
  npm:
    version: 10.2.3
    path: ~/.nvm/versions/node/v18.19.0/bin/npm
  Watchman:
    version: 2024.12.02.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.2
      - iOS 17.2
      - macOS 14.2
      - tvOS 17.2
      - visionOS 1.0
      - watchOS 10.2
  Android SDK:
    API Levels:
      - "31"
      - "35"
    Build Tools:
      - 34.0.0
      - 35.0.0
    System Images:
      - android-35 | Google Play ARM 64 v8a
      - android-Baklava | Google Play ARM 64 v8a
    Android NDK: Not Found
IDEs:
  Android Studio: 2024.2 AI-242.23339.11.2421.12700392
  Xcode:
    version: 15.2/15C500b
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.14
    path: /usr/bin/javac
  Ruby:
    version: 3.3.6
    path: /Users/bryan/.rvm/rubies/ruby-3.3.6/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.3.1
    wanted: 18.3.1
  react-native:
    installed: 0.77.1
    wanted: ~0.77.1
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: Not found
  newArchEnabled: Not found
iOS:
  hermesEnabled: Not found
  newArchEnabled: Not found

info React Native v0.79.0 is now available (your project is running on v0.77.1).
info Changelog: https://github.com/facebook/react-native/releases/tag/v0.79.0
info Diff: https://react-native-community.github.io/upgrade-helper/?from=0.77.1&to=0.79.0
info For more info, check out "https://reactnative.dev/docs/upgrading?os=macos".

Stacktrace or Logs

Not applicable.

Reproducer

https://github.com/bryanmylee/missing-types-new-arch-native-methods

Screenshots and Videos

I've searched for any mention of this all over but can't find anything, and the documentation barely makes a mention of getBoundingClientRect.

This appears to be the most valid channel to report this bug, however this does not produce a stacktrace or reproducer, so I'm happy to move this elsewhere if necessary.

[react-native-bot]

Tip

Newer version available: You are on a supported minor version, but it looks like there's a newer patch available - 0.77.2. Please upgrade to the highest patch for your minor or latest and verify if the issue persists (alternatively, create a new project and repro the issue in it). If it does not repro, please let us know so we can close out this issue. This helps us ensure we are looking at issues that still exist in the most recent releases.

[react-native-bot]

Tip

Newer version available: You are on a supported minor version, but it looks like there's a newer patch available - undefined. Please upgrade to the highest patch for your minor or latest and verify if the issue persists (alternatively, create a new project and repro the issue in it). If it does not repro, please let us know so we can close out this issue. This helps us ensure we are looking at issues that still exist in the most recent releases.

[bryanmylee]

I've verified that this issue persists on 0.77 and the latest version of react-native.

[bryanmylee]

I've also filed an issue for the missing documentation of this feature.

[FightFarewellFearless]

If i remember correctly, the getBoundingClientRect is not stable yet, and u can access it by calling ref.current.unstable_getBoundingClientRect

[mateoguzmana]

Just to confirm @bryanmylee, have you tried using this as you describe? If so, could you please add a code snippet to your reproducer that we can check? (I don't see it in the reproducer you linked.)

Maybe we need to add unstable_getBoundingClientRect instead to the type definitions if it works like @FightFarewellFearless pointed out.