Combining class and ID in your CSS selector, best practice?

When combining a class and ID in开发者_运维技巧 CSS is it better practice to use .class#id or #id.class? Does one have advantages over the other, or are they treated exactly the same by every browser? Thoughts?

They both point to the same element due to that id selector, so they work the same way.

As for advantages, I feel that .class#id is suited more for specific cases of a .class element (like a sticky post in a blog), and a #id.class is just an extension of the #id element's stylesheet.

I'm not sure if this is common practice, but I find it helpful.

I believe you can find some useful information here:
How to combine class and ID in CSS selector?