css - Selecting an element that has a specific class and ID -

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I tried to do this and it worked in all browsers (IE, FF, Chrome, Opera and Safari): < / P>

.classname # id

However, I can not find it anywhere on w3c.org, can you tell me where it is? I mean it is supported by all those browsers, so it should be a part of the standard, right?

Many thanks

You can chain the CNS selectors, it's just H 1 is like using a dootle, where you chain select one type selector (H1) and a class selector (.title).


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