Page unload event feature request

[stock90975]

I would like to make a feature request for a new hook for a page unload event on_unload, analogous to on_load Page Load Events

eg. It would be useful to know when to stop a rx.background job. My use case would be to know when the user has navigated away from the page.

eg.

import reflex as rx

class State(rx.State):
    def on_load(self):
        print("Page loaded")
        
    def on_unload(self):
        print("Page is being unloaded")

def index():
    return rx.vstack(rx.text("hello world"))
    
app = rx.App()
app.add_page(index, on_load=State.on_load, on_unload=State.on_unload)

Some background info: https://discord.com/channels/1029853095527727165/1270975091676807179/1270975091676807179 https://discord.com/channels/1029853095527727165/1270899028678414428/1270899030934818897

🙏 Thanks!