<body> docked class not removed when scrolling back to the top?

[Canapin (Coin-coin le Canapin)]

I’m not sure if your reply also implies this but in the future, if it is possible to have a specific class when the header goes sticky that would be neat. A lot of site these days use large, tall headers and I was asked several times to customize a Discourse forum to have such a header. But a tall header means it has to be resized when we scroll and a pre-existing class would be perfect for that.