Anki

Flatpak version

Files location

~/.var/app/net.ankiweb.Anki/data/Anki2/User 1/collection.media/

Stuff

Strikethrough

Go to the field, edit HTML, and enter:
<del> .... text .... </del>

Hide shit

Add into styling of the cards:

.V {opacity:0 ;  line-height:0 ;}
.V:hover {opacity:1 ; line-height:inherit ;}

And surround what you want to hide and show when hovering:

<div class="V">whatever</div>
<span class="V">whatever</span>
<span class="V">

Strikethrough tag in HTML

<s>