LangChain Reference home page
Search...
āK
Ask AI
GitHub
Main Docs
Deep Agents
LangChain
LangGraph
Integrations
LangSmith
āI
LangChain Assistant
New
History
Ask a question to get started
Enter
to send
ā¢
Shift+Enter
new line
Menu
Navigation
Projects
LangGraph
Web
Channels
Pregel
Prebuilt
Remote
Stream
React SDK
Overview
Getting started
useStream
Selectors
Interrupts & headless tools
Subagents & subgraphs
Fork & edit from a checkpoint
Submission queue
Multimodal media
Transports
Suspense
StreamProvider & context
Type safety
Migrating to v1
Vue SDK
Svelte SDK
Angular SDK
LangGraph SDK
Ui
Client
Auth
React
Logging
React Ui
Utils
Server
Stream
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
Language
Python
JavaScript
Theme
Light
Dark
JavaScript
@langchain/react
ToolEvent
Interface
v1.0.20 (latest)
ā
Since v0.3
ToolEvent
Copy
interface
ToolEvent
Properties
property
args
:
unknown
property
duration
:
number
property
error
:
Error
property
name
:
string
property
phase
:
"error"
|
"start"
|
"success"
property
result
:
unknown
View source on GitHub
Version History
