# UnionOptionsAsync

> This document is the Markdown version of [valibot.dev/api/UnionOptionsAsync/](https://valibot.dev/api/UnionOptionsAsync/). For the complete documentation index, see [llms.txt](https://valibot.dev/llms.txt).

Union options async type.

## Definition

- `UnionOptionsAsync` `MaybeReadonly<(BaseSchema<unknown, unknown, BaseIssue<unknown>> | BaseSchemaAsync<unknown, unknown, BaseIssue<unknown>>)[]>`