Will CSS 3 still allow omitting final semicolons?

Question

There seems to be a breaking (i.e. backwards-incompatible) change in the CSS Syntax Module Level 3 specification upcoming draft: trailing semicolon after the last declaratio

Answer 1

I think that it's just a mistake when writing the specifications, and that the real intention was to have it as a separator, just as in previous versions. I expect this to be adjusted in later drafts.

The W3C validation service says that the example without the trailing semicolon is valid CSS level 3.

I will however, as I have always done, end each declaration with a semicolon. This is a good practice, so that you don't forget the separator when you add more declarations.