> For the complete documentation index, see [llms.txt](https://support.closer.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.closer.app/guide/getting-deeper/on-deinit-callback.md).

# On deinit callback

Closer sdk provides callback on widget deinitialization. Deinitialization might happen when user fails to authorize or when `closer.deinit` was used.

```
closer.init({
  orgId: "00000000-0000-0000-0000-000000000000",
  onDeinit: () => console.log("widget deinitialized")
});
```