> For the complete documentation index, see [llms.txt](https://docs.megaeth.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.megaeth.com/moss-docs/methods/methods/on-status-change.md).

# mega.events.onStatusChange()

Subscribe to connection state transitions and keep your app's wallet state synced. Fires whenever the wallet status changes — including disconnects initiated from within the wallet UI itself.

## Signature

`mega.events.onStatusChange(callback: (status: ConnectionStatus) => void): void`

## Parameters

| Field      | Type                                 | Required | Notes                             |
| ---------- | ------------------------------------ | -------- | --------------------------------- |
| `callback` | `(status: ConnectionStatus) => void` | required | Fires on every status transition. |

## Example

```typescript
mega.events.onStatusChange((status) => {
  console.log(status.status, status.address);

  if (status.status === 'disconnected') {
    // Disable transaction actions until reconnect.
  }
});
```

## Response

`void` — the subscription is registered immediately.

## Notes

* The callback is stored as a **single handler**, not a multi-listener event bus. Subscribe once and fan out through your app store if multiple components need the value.
* Subscribing replaces any previous handler — register early (e.g., immediately after [`mega.initialise()`](/moss-docs/methods/methods/initialise.md)) before other code might want to overwrite it.


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