Function AttachData

napi-inl.h:58–84

    typename FreeType,
    node_addon_api_basic_finalize finalizer = default_basic_finalizer<FreeType>>
inline napi_status AttachData(napi_env env,
                              napi_value obj,
                              FreeType* data,
                              void* hint = nullptr) {
  napi_status status;
#if (NAPI_VERSION < 5)
  napi_value symbol, external;
  status = napi_create_symbol(env, nullptr, &symbol);
  if (status == napi_ok) {
    status = napi_create_external(env, data, finalizer, hint, &external);
    if (status == napi_ok) {
      napi_property_descriptor desc = {nullptr,
                                       symbol,
                                       nullptr,
                                       nullptr,
                                       nullptr,
                                       external,
                                       napi_default,
                                       nullptr};
      status = napi_define_properties(env, obj, 1, &desc);
    }
  }
#else  // NAPI_VERSION >= 5
  status = napi_add_finalizer(env, obj, data, finalizer, hint, nullptr);
#endif
  return status;
}

// For use in JS to C++ callback wrappers to catch any Napi::Error exceptions
// and rethrow them as JavaScript exceptions before returning from the callback.