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JavaScript@langchain/reactuseStreamContext
Functionā—Since v0.2

useStreamContext

Accesses the shared stream instance from the nearest StreamProvider. Throws if called outside of one.

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useStreamContext<T = Record<string, unknown>>(): UseStreamReturn<T>

Used in Docs

  • How to implement generative user interfaces with LangGraph

Example 1

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function MessageList() {
  const { messages } = useStreamContext();
  return messages.map((m, i) => <div key={m.id ?? i}>{String(m.content)}</div>);
}

Example 2

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import type { agent } from "./agent";

function Chat() {
  const { toolCalls } = useStreamContext<typeof agent>();
}
View source on GitHub