[Home](./index.md) > [rc-js-util](./rc-js-util.md) > [BroadcastChannel](./rc-js-util.broadcastchannel.md) > [(constructor)](./rc-js-util.broadcastchannel._constructor_.md) ## BroadcastChannel.(constructor) Constructs a new instance of the `BroadcastChannel` class **Signature:** ```typescript constructor(key: TKey); ``` ## Parameters

Parameter	Type	Description
key	TKey