Tablepress: Make a 'versus' Comparison Table (with sticky header!) 

It seems like it may not work with the Datatables library active. Also, chrome and edge can't stick the thead element, you have to target the elements instead.

@@BuildThatWebsite Very helpful video and code! Thank you very much. The sticky header code works for my table press tables in the Opera browser but not in Chrome. :(

@@Dispatern Which element did you stick with CSS? Position sticky works with TH elements but not Thead or TR elements in chrome.

@@BuildThatWebsite Hello! Thank you for the reply. I indeed used it on tr. In the code it's tr.row-1. In my tables the first row works as my table header but I'll try to change that now. Thank you for the tip and have a great weekend! :)

If the CSS is written correctly then the next step is to confirm it's actually being loaded on the page.

Hmm, I wonder if it's a browser support issue. Which browser are you using? One thing that can break sticky table rows is the overflow property. Trying setting the element to overflow: auto; and see if that fixes it.