---
title: "add(_:)"
framework: browserenginekit
role: symbol
role_heading: Instance Method
path: "browserenginekit/layerhierarchyhostingtransactioncoordinator/add(_:)-i66q"
---

# add(_:)

Notifies the transaction coordinator to start coordinating transactions for the given layer hierarchy.

## Declaration

```swift
@MainActor func add(_ layerHierarchy: LayerHierarchy)
```

## Parameters

- `layerHierarchy`: The object to coordinate transactions for.

## Discussion

Discussion The transaction coordinator coordinates any transactions involving layers in the layerHierarchy until you call commit().

## See Also

### Synchronizing transactions

- [add(_:)](browserenginekit/layerhierarchyhostingtransactioncoordinator/add(_:)-7day0.md)
- [commit()](browserenginekit/layerhierarchyhostingtransactioncoordinator/commit().md)