---
id: fast-element.composablestyles
title: ComposableStyles type
hide_title: true
---
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[@microsoft/fast-element](./fast-element.md) &gt; [ComposableStyles](./fast-element.composablestyles.md)

## ComposableStyles type

Represents styles that can be composed into the ShadowDOM of a custom element.

<b>Signature:</b>

```typescript
export declare type ComposableStyles = string | ElementStyles | CSSStyleSheet;
```