Function transform

packages/zod/src/v3/types.ts:468–477

(
    transform: (arg: Output, ctx: RefinementCtx) => NewOut | Promise<NewOut>
  )

  }

  transform<NewOut>(
    transform: (arg: Output, ctx: RefinementCtx) => NewOut | Promise<NewOut>
  ): ZodEffects<this, NewOut> {
    return new ZodEffects({
      ...processCreateParams(this._def),
      schema: this,
      typeName: ZodFirstPartyTypeKind.ZodEffects,
      effect: { type: "transform", transform },
    }) as any;
  }

  default(def: util.noUndefined<Input>): ZodDefault<this>;
  default(def: () => util.noUndefined<Input>): ZodDefault<this>;