There is a V2 alternative. Chromium change: https://chromium.googlesource.com/v8/v8/+/7a67a31b64f231c4c779f5a7fce4440f4b90c95c commit 7a67a31b64f231c4c779f5a7fce4440f4b90c95c Author: Igor Sheludko <ishell@chromium.org> Date: Tue Jun 24 11:16:41 2025 +0200 [api] Deprecate v8::Object::GetPrototype() Uses of this Api are already migrated to a new version GetPrototypeV2(). Bug: 333672197 Change-Id: I0082b5997c34249567e94174848060b5c518d4f5 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/6664463 Reviewed-by: Michael Lippautz <mlippautz@chromium.org> Commit-Queue: Igor Sheludko <ishell@chromium.org> Cr-Commit-Position: refs/heads/main@{#101005}