---
title: WKWebExtension.MessagePort
framework: webkit
role: symbol
role_heading: Class
path: webkit/wkwebextension/messageport
---

# WKWebExtension.MessagePort

An object that manages message-based communication with a web extension.

## Declaration

```swift
@MainActor class MessagePort
```

## Overview

Overview Contains properties and methods to handle message exchanges with a web extension.

## Topics

### Structures

- [WKWebExtension.MessagePort.Error](webkit/wkwebextension/messageport/error.md)

### Instance Properties

- [applicationIdentifier](webkit/wkwebextension/messageport/applicationidentifier.md)
- [disconnectHandler](webkit/wkwebextension/messageport/disconnecthandler.md)
- [isDisconnected](webkit/wkwebextension/messageport/isdisconnected.md)
- [messageHandler](webkit/wkwebextension/messageport/messagehandler.md)

### Instance Methods

- [disconnect()](webkit/wkwebextension/messageport/disconnect().md)
- [disconnect(throwing:)](webkit/wkwebextension/messageport/disconnect(throwing:).md)
- [sendMessage(_:completionHandler:)](webkit/wkwebextension/messageport/sendmessage(_:completionhandler:).md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [Sendable](swift/sendable.md)

## See Also

### Classes

- [WKWebExtension.Action](webkit/wkwebextension/action.md)
- [WKWebExtension.Command](webkit/wkwebextension/command.md)
- [WKWebExtension.DataRecord](webkit/wkwebextension/datarecord.md)
- [WKWebExtension.MatchPattern](webkit/wkwebextension/matchpattern.md)
- [WKWebExtension.TabConfiguration](webkit/wkwebextension/tabconfiguration.md)
- [WKWebExtension.WindowConfiguration](webkit/wkwebextension/windowconfiguration.md)
- [WKWebExtensionController.Configuration](webkit/wkwebextensioncontroller/configuration-swift.class.md)