Category Archives: Uncategorized

Afraid Of Thanksgiving?

Elephant's Picture Book

Illustration:  Thanksgiving Greetings.  Postcard.   Printed in Germany.  CA 1910.

Thanksgiving Greetings.

Postcard.

Printed in Germany.  CA 1910.

View original post

Advertisements

WordPress Twenty Twelve theme rocking with rem relative lengths in CSS

I started messing around with the new WordPress.org twenty twelve theme. In the notes at the top of style.css, I found this:

— This stylesheet uses rem values with a pixel fallback. —

(full rem note from twenty twelve style.css – http://pfhyper.com/css/rem.html)

I had never heard of rem values before. I brought it up at the Coco WordPress Wednesday table and no one there was familiar with them either.

It's sort of a super-charge em value in that you can define the base in the html or body element and that will always be base no matter how deep you go with parent/child relationships with your CSS. Browser support isn't bad although it's recommended to use a pixel fallback for the older browsers.

Some googling led me to the W3C site where I found that there are all sorts of relative length units I'd never heard of: ch, vw, vmin, vmax, and vh.
http://www.w3.org/TR/css3-values/#relative-lengths

Here are a couple of links for further rem reading.
http://snook.ca/archives/html_and_css/font-size-with-rem
http://blog.typekit.com/2011/11/09/type-study-sizing-the-legible-letter/