IE11 is missing User Agent Style for main element (display: block;)

Question

Apparantly IE11 doesn't have a User Agent Style for <main> and therefor no display: block; on it. Why is there no User Agent Style? Is this a bug or on purpose?

Adding display: block; to the main element is enough, tho.

Answer 1

The main element is indeed not fully supported by IE11. Adding main { display: block; } to your CSS is the best solution for IE9+. You don't need to make conditional comments - since display: block; is the default behavior for main elements, it won't mess up anything.