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Zod · Function

z.union

z.union() validates input against several schemas. It succeeds when one option matches and returns the first successful result.

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Syntax

z.union([schemaA, schemaB, ...])

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  • z.xor()
  • z.discriminatedUnion()
  • z.intersection()
  • options

Source: Defining schemas | Zod. Checked 2026-11-03.