Dynamic favicon

[astariul]

Question

I've seen in the docs how to add a custom favicon : either via ui.run() or in the ui.page() decorator with the favicon argument.

But this is static. In my case, I have a page with a path parameter, like so :

from nicegui import ui


@ui.page('/user/{item_id}')
def page(item_id: str):
    ui.label(item_id)
    [...]
    ui.page_title(item_id)

I want to display a different favicon depending on the item_id (just like I can change the tab title dynamically).

How can I achieve this ?

[falkoschindler]

Hi @astariul,

You can overwrite the favicon with a line of custom HTML:

ui.add_head_html('<link href="/static/your-favicon.ico" rel="shortcut icon" />')

Note that it doesn't seem to be possible to overwrite ICOs with PNGs, at least in some browsers. But setting the default to some invalid value like

@ui.page('/test', favicon=' ')

seems to help in such cases.

Allowing to dynamically change the favicon like changing the title with ui.page_title sounds like a useful feature. Let's turn this discussion into a feature request!