Just when you thought css grid layouts are well supported ...

just thought everyone would like to know that the level 2 specs for css grid layouts has been published -

https://www.w3.org/TR/2018/WD-css-grid-2-20180206/

Just for info, Chrome and Firefox will probably have an implementation behind a flag soon, as they both removed all sub-grid support when it was in danger of being dropped from the specs. Firefoxes implementation was not as good as Chromes, but I have not had time to compare the old sub-grid spec with the new yet, so I don't know if there are any significant changes.