I guess you're talking about GSS, which works fine, but I haven't seen any mention of it on the internets until this. What bugs me most is that we're stuck with what browsers provide, and they not gonna do display: cassowary; or display: kiwi; no matter how loud you cry for something a little more sane than a bunch of css crutches glued together.
Oh, that looks so promising that just glancing over that page and seeing a request/allocate cycle felt like a breath of fresh air (well, good old fresh). Thanks for sharing!
I'd totally use this too.
https://gss.github.io/
http://overconstrained.io/