I have already watched the video, I have practiced doing something from there, taking into account the recommendations of Cassie. And it worked.
But here is not a separate working out of flip, namely in the transition. In the gsap topics, I found a description, only according to the old version of barba...
I took your example, barba works, but the flip process itself seems to work only at the end, when the page has already opened, there is some flashing of the block on the page. But it does not work during the download process...
As in the reference, in it, flip is in the process...
https:/ / studio-size. com/
https://prnt.sc/1g61lut - screen
Some simple animation of the transition is obtained, but the entire page as a whole, for example, opacity or zoomout, but not a separate block...
There is clearly some nuance here that I don't understand and probably just don't know that it exists