---
title: USBConfiguration.configurationValue
slug: Web/API/USBConfiguration/configurationValue
tags:
  - API
  - Property
  - Reference
  - USB
  - USBConfiguration
  - WebUSB
  - WebUSB API
  - configurationValue
browser-compat: api.USBConfiguration.configurationValue
---
{{securecontext_header}}{{DefaultAPISidebar("WebUSB API")}}

The **`configurationValue`** read-only property
of the {{domxref("USBConfiguration")}} interface null

## Syntax

```js
var value = USBConfiguration.configurationValue
```

### Value

The [configuration
descriptor](https://www.beyondlogic.org/usbnutshell/usb5.shtml#ConfigurationDescriptors) of the {{domxref("USBDevice")}} specified in the constructor of the
current {{domxref("USBConfiguration")}} instance.

## Specifications

{{Specifications}}

## Browser compatibility

{{Compat}}
