---
title: className
---

Provides a [ClassName Input](classname-input) for the calendar's root element.

<div class='spec'>

String, default: `''`

</div>

```js
className: 'my-calendar'

className: 'my-calendar my-util' // multiple, space-separated
```

Useful for targeting a specific calendar instance with CSS selectors when multiple calendars share the same page.