> For the complete documentation index, see [llms.txt](https://racoon-js.gitbook.io/en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://racoon-js.gitbook.io/en/api/string/enum.md).

# enum

## Effect

Restrict the detected string to be one of `values`.

## Arguments

* `...values` ***(Array\<string>)*** - The valid values that allow the detected string to be.

## Example

```javascript
const schema = racoon.string().enum('a', 'b', 'c');
schema.validate('a'); // pass
schema.validate('b'); // pass
schema.validate('c'); // pass
schema.validate('d'); // fail
```