Logical offsets for start/end are not intuitive

Note that this is not about rtl support -> that is actually awesome 🚀.

Just some examples to illustrate what I’m talking about

Popper v2: https://codesandbox.io/s/nervous-bird-xg963v?file=/src/index.js Floating UI: https://codesandbox.io/s/sad-hellman-drowyp?file=/src/index.js:451-465

I’ve noticed that offset axis now can invert based on alignment. This is not very intuitive since offset now needs to be correctly set based on the the placement that is chosen, i.e. the x,y axis changes orientation.

This is also a huge change from Popper. I can’t speak for all users of Popper, but for Microsoft, this will be a very painful breaking change since large applications like Teams will need to to completely reevaluate all the offsets in the app.

[atomiks]

alignmentOffset could work, with crossAxis reverting back to how it worked in Popper v2

[FezVrasta]

Maybe have a startOffset and endOffset instead?