1. CSS Grid Layout (level 1)

    Method of using a grid concept to lay out content, providing a mechanism for authors to divide available space for layout into columns and rows using a set of predictable sizing behaviors. Includes support for all `grid-*` properties and the `fr` unit.

  2. CSS Flexible Box Layout Module

    Method of positioning elements in horizontal or vertical stacks. Support includes all properties prefixed with `flex`, as well as `display: flex`, `display: inline-flex`, `align-content`, `align-items`, `align-self`, `justify-content` and `order`.

  3. css property: align-content: supported in flex layout

  4. css property: align-content: supported in flex layout: `baseline`

  5. css property: align-content: supported in flex layout: `first baseline`

  6. css property: align-content: supported in flex layout: `last baseline`

  7. css property: align-content: supported in flex layout: `safe` and `unsafe`

  8. css property: align-content: supported in flex layout: `space-evenly`

  9. css property: align-content: supported in flex layout: `start` and `end`

  10. css property: align-content: supported in flex layout: `stretch`

  11. css property: align-content: supported in grid layout