# collaboratorLeft

Emitted when a participant leaves. Update the app's participant list by ID.

Canonical: https://grid.syidax.com/docs/events/collaboratorLeft/

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## What does this API do?

Emitted when a participant leaves. Update the app's participant list by ID.

API for Pro features: Real-time collaboration (existing Pro grade retained)

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## Exact input and result types

```typescript
collaboratorLeft: { id: string }
```

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## Usage flow

Subscribe with grid.addEventListener('collaboratorLeft', handler). The result is in event.detail, and event names are case-sensitive. Remove subscriptions when disposing of the view.

```javascript
const controller = new AbortController();
grid.addEventListener('collaboratorLeft', event => {
  console.log(event.detail);
}, { signal: controller.signal });
// On view disposal: controller.abort();
```

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## Feature explanations and examples

- [Real-time collaboration](https://grid.syidax.com/docs/features/collaboration.md) — Collaboration shares edits, cursors, and presence among users in the same room. A room name alone does not automatically connect devices over the internet.