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# RenderingProcess

A process that manages rendering in an app extension.

```
struct RenderingProcess
```

## Overview

A browser can have one or more rendering extensions, each of which need a separate bundle identifier. The app can launch only one instance of each rendering extension.

## Topics

### Creating and invalidating extension processes

[`init(bundleIdentifier: String?, onInterruption: () -> Void) async throws`](/documentation/BrowserEngineKit/RenderingProcess/init(bundleIdentifier:onInterruption:))

Launches a rendering extension process asynchronously.

[`func invalidate()`](/documentation/BrowserEngineKit/RenderingProcess/invalidate())

Stops the rendering process.

### Creating XPC connections

[`func makeLibXPCConnection() throws -> xpc_connection_t`](/documentation/BrowserEngineKit/RenderingProcess/makeLibXPCConnection())

Creates a new XPC connection to the extension process.

### Coordinating processes

[`func grantCapability(ProcessCapability) throws -> ProcessCapability.Grant`](/documentation/BrowserEngineKit/RenderingProcess/grantCapability(_:))

Grants the specified capability to the process.

[`func grantCapability(ProcessCapability, invalidationHandler: () -> Void) throws -> ProcessCapability.Grant`](/documentation/BrowserEngineKit/RenderingProcess/grantCapability(_:invalidationHandler:))

Grants the specified capability to the process and observes an invalidation closure.

[`func createVisibilityPropagationInteraction() -> any UIInteraction`](/documentation/BrowserEngineKit/RenderingProcess/createVisibilityPropagationInteraction())

Returns an interaction that associates a view with the rendering process.


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