Show favicon over A href link with a Web Component

After my previous longer blogpost Make It Snow!,
time for a smaller code-sized Web Component.

This blogpost: Using a CSS cursor to show the external link Favicon

converted to a <show-favicon> (Vanilla JavaScript) Web Component:

[open the Result tab of this JSFiddle and hover over a link]

That setTimeout explained:
Web Component developers do not connect with the connectedCallback (yet)