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JavaScript@langchain/langgraphwebExtractUpdateType
Type●Since v0.3

ExtractUpdateType

Extract the Update type from any supported schema type.

The Update type represents what a node can return to update the state. All fields are optional since nodes only need to return the fields they modify.

Supports:

  • StateSchema
  • AnnotationRoot
  • StateDefinition (internal channel definitions)
  • InteropZodObject (Zod v3/v4 object schemas)
Copy
ExtractUpdateType: Schema extends AnnotationRoot<
  SD
>  UpdateType<SD> : UpdateType<ToStateDefinition<Schema>> extends U  [U] extends [never]  Partial<FallbackBase> : U : Partial<FallbackBase>
View source on GitHub