1. Broadcast Channel(只要是在同一原始域和用户代理下)

1. 发送信息页面

const bc = new BroadcastChannel('kevin')
bc.postMessage('hhh')

2. 接受信息页面

let clickChannel = new BroadcastChannel('click')
clickChannel .onmessage = (e) => {
  console.log('e :>> ', e)// 发送的数据
}

2.