Voila cannot show Greek letter (latex format) correctly

[uu1477]

When I marked widgets with description, it is working well in JupyterLab.

However, when I use Voila, it cannot show the Greek letter correctly.

I am using the least Voila version, which compiled from this Git repository.

[jtpio]

Thanks @uu1477.

That looks related to #470 and #489.

[maartenbreddels]

I think this is a regression, only markdown cells render to math.

[maartenbreddels]

Correction: this does seem to work in master (browser cache made it not work). Could you try opening the dev console and disable your cache?

[jtpio]

The basics.ipynb notebook still seems to be an issue on master.

[jtpio]

But adding a cell below with the following content seems to load the font, which applies to the slider description above:

x = widgets.Checkbox(value=True, description='$\Psi$ Real')
x

[jgunstone]

adding here because I'm guessing it could be related...

Math not display in Voila.

from IPython.display import Math, display, clear_output
import ipywidgets as w

out = w.Output()
with out: 
    clear_output()
    display(Math('\\frac{\\rm{kg}}{\\rm{m}^{2} \\cdot \\rm{s}^{2}}'))
    
out

env

ubuntu2004

(aectemplater-dev) jovyan@PORT4028:/mnt/c/engDev/git_mf/tmp/aectemplater/ui$ conda list jupyter
# packages in environment at /home/jovyan/miniconda3/envs/aectemplater-dev:
#
# Name                    Version                   Build  Channel
jupyter_client            7.2.2            py39h06a4308_0  
jupyter_core              4.11.1           py39hf3d152e_0    conda-forge
jupyter_server            1.18.1           py39h06a4308_0  
jupyterlab                3.4.4            py39h06a4308_0  
jupyterlab_pygments       0.1.2                      py_0  
jupyterlab_server         2.12.0           py39h06a4308_0  
jupyterlab_widgets        1.0.0              pyhd3eb1b0_1  
(aectemplater-dev) jovyan@PORT4028:/mnt/c/engDev/git_mf/tmp/aectemplater/ui$ conda list ipywidgets
# packages in environment at /home/jovyan/miniconda3/envs/aectemplater-dev:
#
# Name                    Version                   Build  Channel
ipywidgets                7.6.5              pyhd3eb1b0_1  
(aectemplater-dev) jovyan@PORT4028:/mnt/c/engDev/git_mf/tmp/aectemplater/ui$ conda list voila
# packages in environment at /home/jovyan/miniconda3/envs/aectemplater-dev:
#
# Name                    Version                   Build  Channel
voila                     0.3.6              pyhd8ed1ab_0    conda-forge

[jgunstone]

just checked this in v0.5.0a5 and the issue still appears to be persisting

[martinRenou]

Thanks John for commenting on both issues!