API Reference > bentleyjs-core > Ids > Id64 > Id64.isTransientId64 Id64.isTransientId64 Function Determine if the input is a well-formed Id64String and represents a transient Id. isTransientId64(id: string): boolean see Id64.isTransient see Id64.isId64 see TransientIdSequence Parameter Type Description id string Returns - boolean Defined in core/bentley/src/Id.ts Line 436 Last Updated: 11 June, 2024