Function createBroadcastChannel

createBroadcastChannel(channelName): {
    close: (() => void);
    getChannel: (() => BroadcastChannel);
    listen: ((callback: ((event: {
        message: unknown;
        type: string;
    }) => void)) => (() => void));
    send: ((type: string, message: unknown) => void);
}
创建 BroadcastChannel 实例
Parameters
- channelName: string
  通道名称
Returns {
    close: (() => void);
    getChannel: (() => BroadcastChannel);
    listen: ((callback: ((event: {
        message: unknown;
        type: string;
    }) => void)) => (() => void));
    send: ((type: string, message: unknown) => void);
}
- close: (() => void)
  - - (): void
    - Returns void
- getChannel: (() => BroadcastChannel)
  - - (): BroadcastChannel
    - Returns BroadcastChannel
- listen: ((callback: ((event: {
  message: unknown;
  type: string;
  }) => void)) => (() => void))
  - - (callback): (() => void)
    - Parameters
      callback: ((event: {
          message: unknown;
          type: string;
      }) => void)
      (event): void
      Parameters
      event: {
          message: unknown;
          type: string;
      }
      message: unknown
      type: string
      Returns void
      Returns (() => void)
      - (): void
        Returns void
- send: ((type: string, message: unknown) => void)
  - - (type, message): void
    - Parameters
      type: string
      message: unknown
      Returns void
Example
```
const channel = createBroadcastChannel('my-channel');
const removeListener = channel.listen((event) => {
  console.log({ type: event.type, data: event.message });
});
channel.send('message', { message: 'Hello' });
channel.getChannel(); // BroadcastChannel 实例
removeListener(); // 移除监听器
channel.close(); // 关闭通道
```