page.on_close

[nenocalmeida]

My vscode is not capturing the on_close event in python
Flet version: 0.25.1
python version: 3.12.5
Operating system: Windows 10

import flet as ft

def main(page: ft.Page):
page.title = "Flet App"

page.add(ft.Text("Hello, World!"))

def window_event(e):
    if e.data == 'close':
        print('fechando a janela')

page.on_close = window_event    

page.update()

ft.app(main)

[ndonkoHenri]

Inspire yourself from this example from the docs: https://flet.dev/docs/reference/types/window/#destroy

[ndonkoHenri]

That's pretty strange. Does this happen with Flet 0.25.2: pip install 'flet[all]' --upgrade

[alessioprini]

Hi, I identified the same behavior. Is it a confirmed bug? I cannot find issues on that.
flet 0.27.6
python 3.13.3

[ndonkoHenri]

@alessioprini feel free to open an issue with the details.

[FeodorFitsner]

page.on_close is for web only: https://flet.dev/docs/controls/page/#on_close

[hieubnt235]

page.on_close is for web only: https://flet.dev/docs/controls/page/#on_close

Hi, i'm using on_close handler with selfhost fastapi app (export_asgi_app option). I limit the session timeout to 5 seconds, but after session is deleted, the on_close event aren't called. I just want to catch the event that session is expired but cannot, please give me suggestions, thank you.
flet[all]==0.28.3
python>=3.12