Interactive Legend is Unresponsive

Hi,

I’ve created plots with interactive legends that were working yesterday, but the interactivity appears to be completely unresponsive today.

Running the code in the examples gallery also fails to generate an interactive legend for me locally:

from vega_datasets import data

source = data.unemployment_across_industries.url

selection = alt.selection_multi(fields=['series'], bind='legend')

alt.Chart(source).mark_area().encode(
    alt.X('yearmonth(date):T', axis=alt.Axis(domain=False, format='%Y', tickSize=0)),
    alt.Y('sum(count):Q', stack='center', axis=None),
    alt.Color('series:N', scale=alt.Scale(scheme='category20b')),
    opacity=alt.condition(selection, alt.value(1), alt.value(0.2))
).add_selection(
    selection
)

For reference I am using Altair version 4.1.0 and working in Jupyter notebook.

Any help would be greatly appreciated!

[eitanlees]

I wanted to make a note about caching issues. I found problems persisted on certain pages even after attempting to clear cached files in chrome. I learned that if you open the developer console and right click on the refresh button, you can select Empty Cache and Hard Reload. That has fixed any problems I have encountered so far. (link for more info)

[jakevdp]

It’s probably due to your browser cacheing the old library version.