BroadcastChannel.postMessage() sends a message,
which can be of any kind of
to each listener in any browsing context with the same origin.
The message is transmitted as a 'message' event
targeted at each
BroadcastChannel bound to the channel.
Note: This feature is available in Web Workers
Data to be sent to the other window. The data is serialized using the structured clone algorithm. This means you can pass a broad variety of data objects safely to the destination window without having to serialize them yourself.
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BroadcastChannel, the interface it belongs to.