> There is a platform-independent solution though, one that renders properly ... See if you can figure it out.

Clickbait is low-quality content and the author here seems smug and unhelpful.

Just a simple inspect element can tell you that it use css "transform: rotate(-180deg)" on a up arrow. Don't be so harsh about this.

That was definitely my intent, but I'll add a little note in case it was too coy.