[BUG] set_pico_cls() Fails to Add Classes in Jupyter Notebook Output

[Zaseem-BIsquared]

Describe the Problem

In Jupyter Notebook, when I use set_pico_cls() along with show(picocondlink) to apply Pico styling, the expected styling doesn’t show up in the output

Steps to Reproduce

Here’s a simple example to show the issue:

from fasthtml.common import *

show(picocondlink)
set_pico_cls()

show(Titled("Greeting", Div(P("Hello  World!")), Button("Hello")))

What I Expected

I was expecting set_pico_cls() to automatically apply the pico class to the elements, but it didn’t.

Workaround I Found

As a temporary fix, I used this helper function to manually apply the pico class:

def show_with_pico(*args):
    return show(Div(*args, cls="pico"))

It’s not ideal, but it works for now.

Environment Details

Here are the versions of the libraries I’m using:

• fastlite: 0.1.1
• fastcore: 1.7.28
• fasthtml: 0.11.0

Confirmation Checklist

• I’ve checked the [FAQ](https://docs.fastht.ml/explains/faq.html) to see if this is a known issue.
• I’ve included a minimal example to reproduce the problem.
• I’ve provided the library versions I’m using.
• I understand this is a volunteer-driven open-source project.

Screenshot of the Problem