[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [WebSocket](https://evolu.dev/docs/api-reference/common/WebSocket) › WebSocketConnectionError

Defined in: [packages/common/src/WebSocket.ts:171](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/WebSocket.ts#L171)

An error that occurs when an established connection encounters an issue
(e.g., failure to send data). Fires before `onclose`.

Note: Only Node.js and WebKit fire this error on abrupt server termination.
Chromium and Firefox only fire `onclose` without a preceding error event.

https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/error_event

## Extends

- [`Typed`](https://evolu.dev/docs/api-reference/common/Type/interfaces/Typed)\<`"WebSocketConnectionError"`\>

## Properties

<a id="event"></a>

### event

```ts
readonly event: Event;
```

Defined in: [packages/common/src/WebSocket.ts:172](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/WebSocket.ts#L172)

---

<a id="type"></a>

### type

```ts
readonly type: "WebSocketConnectionError";
```

Defined in: [packages/common/src/Type.ts:3492](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Type.ts#L3492)

#### Inherited from

[`Typed`](https://evolu.dev/docs/api-reference/common/Type/interfaces/Typed).[`type`](https://evolu.dev/docs/api-reference/common/Type/interfaces/Typed#type)