> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes.

# WebRTCMediaDevices

> Subset of the MediaDevices interface actually used by the SDK.

Subset of the `MediaDevices` interface actually used by the SDK.

Implementations only need to provide these methods — the full browser
`MediaDevices` type is intentionally not required so that React Native
and other non-browser environments can conform without polyfilling
unused APIs.

## **Methods**

### addEventListener()

```ts
addEventListener(type, listener): void
```

#### Parameters

**`type`** `string` — required

Event type to listen for.

---

**`listener`** `EventListenerOrEventListenerObject` — required

Listener invoked when the event fires.

---

#### Returns

`void`

---

### enumerateDevices()

```ts
enumerateDevices(): Promise<MediaDeviceInfo[]>
```

#### Returns

`Promise<MediaDeviceInfo[]>`

---

### getDisplayMedia()?

```ts
optional getDisplayMedia(options): Promise<MediaStream>
```

#### Parameters

**`options`** `DisplayMediaStreamOptions` — required

Options to pass to `getDisplayMedia`.

---

#### Returns

`Promise<MediaStream>`

---

### getUserMedia()

```ts
getUserMedia(constraints): Promise<MediaStream>
```

#### Parameters

**`constraints`** `MediaStreamConstraints` — required

Media-track constraints to pass to `getUserMedia`.

---

#### Returns

`Promise<MediaStream>`

---

### removeEventListener()

```ts
removeEventListener(type, listener): void
```

#### Parameters

**`type`** `string` — required

Event type to listen for.

---

**`listener`** `EventListenerOrEventListenerObject` — required

Listener invoked when the event fires.

---

#### Returns

`void`

> Subset of the MediaDevices interface actually used by the SDK.