Javascript 当用户在我的聊天室中发送消息时，我如何发送通知？

希望你能帮忙

我的通知代码，到目前为止：

(async () => {
  Notification.requestPermission(permission => {
    if (permission === 'granted') {
      if (notifications == true) {
        const myNoti = new Notification(`Froggy Chatroom`, {
          body: `USER_MESSAGE_HERE`,
          icon: './favicon.ico'
        });
        myNoti.onclick = function (e) {
          window.focus();
        }
      }
    }

        // navigate to a URL when clicked
        notification.addEventListener('click', () => {

            window.open('https://froggy-chatroom.unluckyfroggy.repl.co', '_blank');
        });
  });
    // check notification permission
    let granted = false;

    if (Notification.permission === 'granted') {
        granted = true;
        new Notification(`Froggy Chatroom`, {
          body: `Welcome!`,
          icon: './favicon.ico'
        });
    } else if (Notification.permission !== 'denied') {
        let permission = await Notification.requestPermission();
        granted = permission === 'granted' ? true : false;
    }
})();

消息的变量为“message”。

此外，这里还有一个指向测试聊天室的链接：