30 lines
871 B
Markdown
30 lines
871 B
Markdown
# MessageChannelMain
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`MessageChannelMain` is the main-process-side equivalent of the DOM
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[`MessageChannel`][] object. Its singular function is to create a pair of
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connected [`MessagePortMain`](message-port-main.md) objects.
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See the [Channel Messaging API][] documentation for more information on using
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channel messaging.
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## Class: MessageChannelMain
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Example:
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```js
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const { port1, port2 } = new MessageChannelMain()
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w.webContents.postMessage('port', null, [port2])
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port1.postMessage({ some: 'message' })
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```
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### Instance Properties
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#### `channel.port1`
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A [`MessagePortMain`](message-port-main.md) property.
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#### `channel.port2`
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A [`MessagePortMain`](message-port-main.md) property.
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[`MessageChannel`]: https://developer.mozilla.org/en-US/docs/Web/API/MessageChannel
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[Channel Messaging API]: https://developer.mozilla.org/en-US/docs/Web/API/Channel_Messaging_API
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