@He7d3r I can't reproduce. Can you see if the issue is still present?

@Negative24 He means: He has clicked the "X" icon at the top-right of the siderail, which makes it collapse into a hidden state. (This is only possible if our browser window is wide-enough to have it positioned at the side to start with. Otherwise it is shown across the whole page-top.)

Once collapsed, there's a sticky user preference to keep it collapsed on future Flow Board visits.
But, whenever He7d3r opens a Flow Board, he's seeing a FOUC before the siderail collapses.

(Sidenote: It could be argued (not strongly... but it could!) that this is a good thing, as it reminds us to look at or think about the content, regularly... ;-) /me runs away. )

@Quiddity No that makes sense. Its a little reminder that its still there.
I'm still not seeing how the sidebar showing up momentarily is a FOUC, though. It looks styled and fine in both states.

We are aware of this behavior. It is due to the fact that until the page is fully loaded, you have the no-javascript experience, in which the siderail is not collapsible. Once everything is loaded, it reads your user preferences and collapse the siderail as needed.

We are experimenting with other front end technologies that would make this whole class of issues go away. Thanks for your patience.

I'm still not seeing how the sidebar showing up momentarily is a FOUC, though. It looks styled and fine in both states.

Agree. The side bar even if it's displayed momentarily seems to be correctly styled.

In T102648#1422574, @Etonkovidova wrote:

I'm still not seeing how the sidebar showing up momentarily is a FOUC, though. It looks styled and fine in both states.

Agree. The side bar even if it's displayed momentarily seems to be correctly styled.

I think the task is just not perfectly-accurately titled.
He was using "FOUC" in the very loose sense of "a flash of something imperfect, followed rapidly by the state it should be in."

Quiddity is right.