LangChain Reference home pageLangChain ReferenceLangChain Reference
  • GitHub
  • Main Docs
Deep Agents
LangChain
LangGraph
Integrations
LangSmith
LangGraph
  • Web
  • Channels
  • Pregel
  • Prebuilt
  • Remote
  • Stream
LangGraph SDK
  • Client
  • Auth
  • React
  • Logging
  • React Ui
  • Server
LangGraph Checkpoint
LangGraph Checkpoint MongoDB
LangGraph Checkpoint Postgres
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
WebChannelsPregelPrebuiltRemoteStream
LangGraph SDK
ClientAuthReactLoggingReact UiServer
LangGraph Checkpoint
LangGraph Checkpoint MongoDB
LangGraph Checkpoint Postgres
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/langgraphwebInferExtensions
Type●Since v1.3

InferExtensions

Infers the merged extensions type from a tuple of transformer factory functions.

Given [() => StreamTransformer<{ a: number }>, () => StreamTransformer<{ b: string }>], produces { a: number } & { b: string }.

Copy
InferExtensions: T extends readonly []  Record<
  string,
  never
> : T extends readonly [(

) => StreamTransformer<P>, ...Rest]  P  InferExtensions<Rest> : Record<string, unknown>
View source on GitHub