# websocket

**Kind:** Constant

**Source:** [`src/adapter/bun/websocket.ts`](https://github.com/honojs/hono/blob/main/src/adapter/bun/websocket.ts#L76)

**Part of:** [Adapter](subsystem-src-adapter)

## Definition

```ts
BunWebSocketHandler<BunWebSocketData>
```

## Value

```ts
{
  open(ws) {
    const websocketListeners = ws.data.events
    if (websocketListeners.onOpen) {
      websocketListeners.onOpen(new Event('open'), createWSContext(ws))
    }
  },
  close(ws, code, reason) {
    const websocketListeners = ws.data.events
    if (websocketListeners.onClose) {
      websocketListeners.onClose(
        new CloseEvent('close', {
          code,
          reason,
     …
```