---
id: fast-foundation.deriveddesigntokenvalue
title: DerivedDesignTokenValue type
hide_title: true
---
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[@microsoft/fast-foundation](./fast-foundation.md) &gt; [DerivedDesignTokenValue](./fast-foundation.deriveddesigntokenvalue.md)

## DerivedDesignTokenValue type

A  value that is derived. These values can depend on other s or arbitrary observable properties.

<b>Signature:</b>

```typescript
export declare type DerivedDesignTokenValue<T> = T extends Function ? never : (target: HTMLElement) => T;
```