Update CSS Regions
Update the IE implementation of Regions to match the current spec and interoperate with the Safari implementation
Updating CSS Regions to match the latest spec is currently on the Microsoft Edge backlog with a priority of medium.
CSS Regions are important for CSS Grid and Flex to be complete. It also helps eliminate confusion and stress between designers, developers, and content contributors.
With CSS Regions a designer/developer can freely create unique and intriguing content templates, while not hindering the freedom of the writer. http://codepen.io/glennphilp/pen/LyjbMz