@liveview_handler("notify_all")
def notify_all(consumer, content):
    message = content["form"]["message"]

    html = render_to_string("notification.html", {
        "message": message
    })

    send(consumer, {
        "target": "#notifications",
        "html": html,
        "append": True
    }, broadcast=True)  # Sends to ALL connected users

from threading import Thread
from time import sleep
from uuid import uuid4

@liveview_handler("send_notification")
def send_notification(consumer, content):
    notification_id = str(uuid4().hex)
    message = "New update available!"

    def broadcast_notification():
        # Send notification
        html = render_to_string("notification.html", {
            "id": notification_id,
            "message": message
        })

        send(consumer, {
            "target": "#notifications",
            "html": html,
            "append": True
        }, broadcast=True)

        # Remove after 5 seconds
        sleep(5)
        send(consumer, {
            "target": f"#notification-{notification_id}",
            "remove": True
        }, broadcast=True)

    Thread(target=broadcast_notification).start()