0.9.1-alpha.20

Patch Changes

• 4a14277: Stack and Grid join the layout lot

  Stack overlays. The root is the containing block (position: relative) and Stack.Item is a layer taken out of the flow (position: absolute); where a layer sits is R14 — top, bottom, start, end, zIndex. The first child stays in the flow and gives the stack its size. Overlaying is composed rather than inferred: a stack that positioned every child but the first would have to guess which one sets the size, and would change meaning the day a caller reordered them.

  Grid lays out a fixed number of columns, wrapping, and measures its column width rather than expressing it as a percentage. width: '33.33%' resolves against the content box and knows nothing about the gaps, so three cells plus two gaps overflow their row. The root reads its own width and publishes the exact column width; Grid.Item span={n} covers several columns, gaps included. gap is the grid's own prop because the root has to read it to size the cells.

  Container and the remaining legacy view/ entries are not planned: they are R14 or Stack.