Not interested in the explanation? Head straight to the example page.
Now you can create rounds corners easily using CSS. There is a bit of variance between browser vendors at the moment but I imagine eventually the syntax will standardise. To add rounded corners you just need:
/* Gecko browsers */ -moz-border-radius: 5px; /* Webkit browsers */ -webkit-border-radius: 5px; /* W3C syntax - likely to be standard so use for future proofing */ border-radius:10px;
And that’s all there is to it. Firefox did have some problems aliasing the corners but this has been fixed now so you can enjoy crisp rounded corners with no effort.
You can even specify which corners have border-radius applied to them. Again the syntax is slightly different between browsers so you’ll need to list both.
/* Gecko browsers */ -moz-border-radius-topleft: 20px; -moz-border-radius-topright: 0; -moz-border-radius-bottomleft: 0; -moz-border-radius-bottomright: 20px; /* Webkit browsers */ -webkit-border-top-left-radius: 20px; -webkit-border-top-right-radius: 0; -webkit-border-bottom-left-radius: 0; -webkit-border-bottom-right-radius: 20px; /* W3C syntax */ border-top-left-radius: 20px; border-top-right-radius: 0; border-bottom-right-radius: 0; border-bottom-left-radius: 20px;
True - this won’t validate with CSS 2.1 validators simply becuase this isn’t CSS 2.1. If you are a validation obsessive then I suggest putting these rules in a separate CSS3 file. If you can’t handle having *any* non-validating code on your site then you’d better wait a bit longer.
Border-radius is supported in Firefox 2 & 3, Safari 3 and related Gecko and Webkit browsers.
Internet Explorer 6 & 7 and 8 (as far as I know) and Opera do not support rounded corners. Instead these users will see a regular corner.
For me this is an example of progressive enhancement. So what are you waiting for?
You can see the effects that are available in the demo, or grab the source from Github.
Have an update or suggestion for this article? You can edit it here and send me a pull request.
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