Factoid of the day – CSS trivia

The em is a unit meaning “The size of a capital M”.

In particular this is relative, so for nested elements it means “The size of a capital M in my parent element.”

What do you think happens if you have the following piece of css (which we did)?

font-size : 0.96em;

Which is the source of a bug in some of the YUI widgets we were using which, for reasons we didn’t previously understand, were getting extremely small text. This is now sorted. :-)

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