How to automatically close open web pages

[omaiyiwa]

Question

• I created a countdown timer and close the application when the countdown timer reaches 0 via app.shutdown(), but the webpage doesn't exit automatically.
• How to implement the web page automatic exit function?

import asyncio
from nicegui import ui, app


async def countdown_timer(initial_time=0.5):
    total_seconds = initial_time * 60
    while total_seconds >= 0:
        minutes, seconds = divmod(int(total_seconds), 60)
        timer_label.text = f'{minutes:02}:{seconds:02}'
        if total_seconds <= 0:
            app.shutdown()
        await asyncio.sleep(1)
        total_seconds -= 1


timer_label = ui.label(f'{0.5}').style('font-size: 20px;')
ui.timer(1, countdown_timer)
ui.run(reload=False, port=8081)

[rodja]

How to implement the web page automatic exit function?

What do you mean with exit function? What should happen? Should the browser show another page? Or show a message?

[falkoschindler]

Like the error message says: You can't await ui.run_javascript without using a @page function. But you don't have to. Simply remove the await keyword:

        if total_seconds <= 0:
            ui.run_javascript('window.close()')
            app.shutdown()

[omaiyiwa]

It seems to close successfully, but after many attempts, it sometimes closes successfully and sometimes it doesn't and continues to wait for a reconnection.

[omaiyiwa]

like this

[falkoschindler]

Maybe you need a short delay between calling ui.run_javascript and app.shutdown. Otherwise the JavaScript command is still in the outbox when the app shuts down.