---
title: debug.feature() function
description: >
  `debug.feature()` returns the value associated with the given feature flag.
menu:
  flux_v0_ref:
    name: debug.feature
    parent: internal/debug
    identifier: internal/debug/feature
weight: 201
---

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`debug.feature()` returns the value associated with the given feature flag.



##### Function type signature

```js
(key: string) => A
```

{{% caption %}}
For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
{{% /caption %}}

## Parameters

### key
({{< req >}})
Feature flag name.