How to find the css version?

Question

How do I find the version of CSS that I am using?

Answer 1

Although the CSS specification is defined in several versions (v2, 2.1, 3), the CSS version isn't really relevant to the developer; you need to be more concerned with which web browsers support a given feature.

It is useful to know that a given feature was defined in CSS2, 2.1 or 3 because that can give you an idea of how old the feature is, and therefore how likely it is that browsers will support it -- for example border-radius is a CSS3 feature, so browsers more than a couple of years old may not support it fully.

You can find out what CSS features are supported in which browsers from the following sites:

• http://www.quirksmode.org/css/contents.html
• http://caniuse.com/

Answer 2

The version is only defined by the CSS selectors, propreties and attributes that you use.

You are free to mix elements of CSS 1, 2 and 3 in any styles that you write.

You can refer to the CSS specifications to see more details. The specifications and drafts at the W3C is available via this index: http://www.w3schools.com/w3c/w3c_css.asp

Answer 3

Just an addition of what @Craig said.

In my .net 2.0 framework I have a property to show scroll bars. As I want just the vertical, I've added both properties and, if the browser that user is using support this new CSS 3.0 property (overflow-x), he will see just the vertical one.