CSS counters - only used with content?

Question

According to spec, can / will CSS counters are used only in conjunction with the content property?

 * { content: counter(mycounter) "! "; counter-increment: mycounter } 

Or can other properties be / will be used, such as (random example) padding ?

 /* is this possible? is this supposed to be possible? */ * { padding:counter(mycounter)px; } 

Finally, if this is a feature of CSS, how much is it implemented in browsers?

Answer 1

In CSS2.1, the counter() function is really defined for use only with the content property; you cannot use counters to indicate numerical values ​​for other properties.