LangChain Reference home pageLangChain ReferenceLangChain Reference
  • GitHub
  • Main Docs
Deep Agents
LangChain
LangGraph
Integrations
LangSmith
LangGraph
  • Web
  • Channels
  • Pregel
  • Prebuilt
  • Remote
LangGraph SDK
  • Client
  • Auth
  • React
  • Logging
  • React Ui
  • Server
LangGraph Checkpoint
LangGraph Checkpoint MongoDB
LangGraph Checkpoint Postgres
  • Store
LangGraph Checkpoint Redis
  • Shallow
  • Store
LangGraph Checkpoint SQLite
LangGraph Checkpoint Validation
  • Cli
LangGraph API
LangGraph CLI
LangGraph CUA
  • Utils
LangGraph Supervisor
LangGraph Swarm
⌘I

LangChain Assistant

Ask a question to get started

Enter to send•Shift+Enter new line

Menu

LangGraph
WebChannelsPregelPrebuiltRemote
LangGraph SDK
ClientAuthReactLoggingReact UiServer
LangGraph Checkpoint
LangGraph Checkpoint MongoDB
LangGraph Checkpoint Postgres
Store
LangGraph Checkpoint Redis
ShallowStore
LangGraph Checkpoint SQLite
LangGraph Checkpoint Validation
Cli
LangGraph API
LangGraph CLI
LangGraph CUA
Utils
LangGraph Supervisor
LangGraph Swarm
Language
Theme
JavaScript@langchain/langgraphindexgetPreviousState
Function●Since v0.3

getPreviousState

A helper utility function for use with the functional API that returns the previous state from the checkpoint from the last invocation of the current thread.

This function allows workflows to access state that was saved in previous runs using entrypoint.final.

Copy
getPreviousState<StateT>(): StateT

Used in Docs

  • Functional API overview

Example

Copy
const previousState = getPreviousState<{ counter: number }>();
const newCount = (previousState?.counter ?? 0) + 1;
View source on GitHub