Get current full link or anchor link with twig

What I want to do:

• Twig checks url if there is an anchor link included.
• If there is an anchor link twig changes some meta informations.

Problem:

• Can´t find a way to retrieve the url WITH the anchor.

So my question. Is there any way I can retrieve the full url with twig to get the anchor or is there even a option to get the anchor information directly?

Oh ok thank you for your fast response!
Then JS it will be.