Possible Duplicate:
CSS: div id VS. div class
I am new to CSS and have general question: how do you decide wether it is better to use class selector or id selector?
Possible Duplicate: CSS: div id VS. div class I am new to CSS and
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Possible Duplicate:
CSS: div id VS. div class
I am new to CSS and have general question: how do you decide wether it is better to use class selector or id selector?
The answers on this page are all good, but approach the difference from a more pragmatic point of view. Let me try an explain it to you from another point of view. The id you use when you define a conceptual entity of your page, for example a list of something, or a page footer or a navigational menu. Something of which you generally have merely one, as another wouldn’t make sense or would be another type of entity. When you have a pattern of repeating entities, or element which serve the same purpose you tend to assign them a class, think about section headers, photos in a gallery etc. So the items in the previously mentioned list would all be assigned the same class name.
Note though, that merely for styling reasons you could do with just classes, never use a single id, and be perfectly fine. It doesn’t matter whether your class is used just once, or many times.