Unexpected popup "https://polyfill.io/" when using an older al-folio template;

[rishiyama]

Hi everyone,

I encountered an unexpected popup on my personal website, which was built using an older version of the al-folio template.

In my case, the older template still included the following Polyfill script in _includes/scripts/mathjax.html:

<script defer src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>

Removing this line fixed the issue on my site.

For reference, here is the commit where I removed it:

rishiyama/rishiyama.github.io@582e872

If you are using an older al-folio template and see unexpected popups, please check whether this script is still included. Also, please be careful not to enter any information into such popups.

Hope this helps.

[rishiyama]

This issue may be related to PR #2241, which replaced polyfill.io in the template:

#2241

Since that PR was merged on Mar 4, 2024, sites created from an al-folio template before that change may still include the old polyfill.io script and could potentially be affected.

I checked a few randomly selected websites from the "User community" section in the README at the latest commit I checked:

8155e31

In my environment, some of them showed the same or similar unexpected popups, although this may depend on the browser, environment, timing, or other factors.