Creating rounded corners using CSS [closed]

Answer 1

Here's an HTML/js/css solution that I did recently. There's a 1px rounding error with absolute positioning in IE so you want the container to be an even number of pixels wide, but it's pretty clean.

HTML:

<div class="s">Content</div>

jQuery:

$("div.s")
.wrapInner("<div class='s-iwrap'><div class='s-iwrap2'>")
.prepend('<div class="tr"/><div class="tl"/><div class="br"/><div class="bl"/>');

CSS:

/*rounded corner orange box - no title*/
.s {
    position: relative;
    margin: 0 auto 15px;
    zoom: 1;
}

.s-iwrap {
    border: 1px solid #FF9933;
}

.s-iwrap2 {
    margin: 12px;
}

.s .br,.s .bl, .s .tl, .s .tr {
    background: url(css/images/orange_corners_sprite.png) no-repeat;
    line-height: 1px;
    font-size: 1px;
    width: 9px;
    height: 9px;
    position: absolute;
}

.s .br {
    bottom: 0;
    right: 0;
    background-position: bottom right;
}

.s .bl {
    bottom: 0;
    left: 0;
    background-position: bottom left;
}

.s .tl {
    top: 0;
    left: 0;
    background-position: top left;
}

.s .tr {
    top: 0;
    right: 0;
    background-position: top right;
}

Image is just 18px wide and has all 4 corners packed together. Looks like a circle.

Note: you don't need the second inner wrapper, but I like to use margin on the inner wrapper so that margins on paragraphs and headings still maintain margin collapse. You can also skip the jquery and just put the inner wrapper in the html.

Answer 2

I looked at this early on in the creation of Stack Overflow and couldn't find any method of creating rounded corners that didn't leave me feeling like I just walked through a sewer.

CSS3 does finally define the

border-radius:

Which is exactly how you'd want it to work. Although this works OK in the latest versions of Safari and Firefox, but not at all in IE7 (and I don't think in IE8) or Opera.

In the meantime, it's hacks all the way down. I'm interested in hearing what other people think is the cleanest way to do this across IE7, FF2/3, Safari3, and Opera 9.5 at the moment..

Answer 3

I generally get rounded corners just with css, if browser does not support they see the content with flat corners. If rounded corners are not so critical for your site you can use these lines below.

If you want to use all corners with same radius this is the easy way:

.my_rounded_corners{
   -webkit-border-radius: 5px;
           border-radius: 5px;
}

but if you want to control every corner this is good:

.my_rounded_corners{
    border: 1px solid #ccc;

    /* each value for each corner clockwise starting from top left */
    -webkit-border-radius: 10px 3px 0 20px;
            border-radius: 10px 3px 0 20px;
}

As you see in each set you have browser specific styles and on the fourth rows we declare in standard way by this we assume if in future the others (hopefully IE too) decide to implement the feature to have our style be ready for them too.

As told in other answers, this works beautifully on Firefox, Safari, Camino, Chrome.

Answer 4

Sure, if it's a fixed width, it's super easy using CSS, and not at all offensive or laborious. It's when you need it to scale in both directions that things get choppy. Some of the solutions have a staggering amount of divs stacked on top of each other to make it happen.

My solution is to dictate to the designer that if they want to use rounded corners (for the time being), it needs to be a fixed width. Designers love rounded corners (so do I), so I find this to be a reasonable compromise.

Answer 5

To addition of htc solutions mention above, here're another solutions and examples to reach rounded corners in IE.

Answer 6

In Safari, Chrome, Firefox > 2, IE > 8 and Konquerer (and probably others) you can do it in CSS by using the border-radius property. As it's not officially part of the spec yet, please use a vendor specific prefix...

Example

#round-my-corners-please {
    -webkit-border-radius: 20px;
    -moz-border-radius: 20px;
    border-radius: 20px;
}

The JavaScript solutions generally add a heap of small divs to make it look rounded, or they use borders and negative margins to make 1px notched corners. Some may also utilise SVG in IE.

IMO, the CSS way is better, as it is easy, and will degrade gracefully in browsers that don't support it. This is, of course, only the case where the client doesn't enforce them in non supported browsers such as IE < 9.