[ryan-c]

I do that, plus a little more (page being closed), with an identifier in session storage. If doNotTrack is turned on, the session storage is skipped.

I do not have a consent banner, and I do not believe that I need one.

[t0mas88]

Technically you need one, because you're using session storage for something that is not strictly necessary to make the page work. It's in the article.