This issue comes to you from An Event Apart in Washington DC. Yesterday I spoke on CSS Grid Layout and other new layout methods, with a focus on creating components in order to make supporting older browsers easier. This issue also includes a blog post that I wrote last week on the theme of browser compatibility. Watch this space for some more tips and tricks in that regard.
On the subject of browsers, the updated Edge implementation is now on by default in Insider Preview. Looking forward to having across the board modern browser support for Grid!