A demo of Event class's emitted method

[python-and-novella]

Before NiceGUI 3.0.0, we can only make button displayed after clicked like this:

from nicegui import ui

async def index():
    await ui.button('Do Something One').clicked()
    await ui.button('Do Something Two').clicked()
    await ui.button('Do Something Three').clicked()

ui.run(root=index,native=True)

In NiceGUI 3.0.0, we get another way, it performs same but with Event:

from nicegui import ui,Event

async def index():
    signal_obj = Event()
    ui.button('Do Something One',on_click=signal_obj.emit)
    await signal_obj.emitted()
    ui.button('Do Something Two',on_click=signal_obj.emit)
    await signal_obj.emitted()
    ui.button('Do Something Three',on_click=signal_obj.emit)
    await signal_obj.emitted()

ui.run(root=index,native=True)

[falkoschindler]

Interesting application, @python-and-novella!

Just to be clear: Your first example will continue to work in 3.0. But to sync multiple browser tabs, the second example uses a global Event. So clicking the first button will show the second button on all tabs and so on.

[python-and-novella]

You are right, I has updated it.
It is a application of emitted, Because I confused with it before, now I get it.