Why do mozilla and webkit prepend -moz- and -webkit- to CSS3 rules?
- by egarcia
CSS3 rules bring lots of interesting features.
Take border-radius, for example. The standard says that if you write this rule:
div.rounded-corners {
border-radius: 5px;
}
I should get a 5px border radius.
But neither mozilla nor webkit implement this. However, they implement the same thing, with the same parameters, with a different name (-moz-border-radius and -webkit-border-radius, respectively).
In order to satisfy as many browsers as possible, you end up with this:
div.rounded-corners {
border-radius: 5px;
-moz-border-radius: 5px;
-webkit-border-radius: 5px;
}
I can see two obvious disadvantages:
Copy-paste code. This has obvious risks that I will not discuss here.
The W3C CSS validator will not validate these rules.
At the same time, I don't see any obvious advantages.
I believe that the people behind mozilla and webkit are more intelligent than myself. There must be some good reasons to have things structured this way. It's just that I can't see them.
So, I must ask you people: why is this?
