Webmaster Forum / HTML, CSS, Scripts / CSS / September 2007

Scripsit mao:

It contains a most spectacular comment. It is potentially useful for
misleading people, if the actual CSS code is later changed and the comment
is not. :-)

It means that you need to read a primer, a tutorial, or a book on CSS now.
It's a matter of very basic constructs in CSS, so if you needed an
explanation, you need a crash course in CSS before trying to understand
other people's CSS code (which is often much more difficult and much less
useful than writing good CSS code of your own).

In CSS, you specify that some declarations are to be applied to some
elements by listing selectors that refer to elements, using a comma as a
separator. At the simplest, a selector is just an element's name, like html
or body. Thus

html, body { something }

is equivalent to

html { something }
body { something }

(and the line break is irrelevant: it is equivalent to a space in CSS).