struct.or

function or<const T extends readonly [StructLike, ...StructLike[]]>(
  ...options: T
): UnionStruct<T>;

struct.or is variadic: pass each option as its own argument.

• Tries the options in order and returns the result of the first one that parses.

• If none matches, it fails with one invalid_union issue at the union's own path. The issues of the individual options are not reported.

• Throws TypeError when an option is not a struct.

UnionStruct<T> is not exported. It is a Struct whose input and output are the unions of the option types, without undefined. For tagged objects prefer struct.discriminatedUnion(), which reports the issue of the selected option.