Gradient borders

WebKit now (and Chrome 12 at least) supports gradients as border image:

-webkit-border-image: -webkit-gradient(linear, left top, left bottom, from(#00abeb), to(#fff), color-stop(0.5, #fff), color-stop(0.5, #66cc00)) 21 30 30 21 repeat repeat;

Prooflink -- http://www.webkit.org/blog/1424/css3-gradients/
Browser support: http://caniuse.com/#search=border-image


border-image-slice will extend a CSS border-image gradient

This (as I understand it) prevents the default slicing of the "image" into sections - without it, nothing appears if the border is on one side only, and if it's around the entire element four tiny gradients appear in each corner.

body{
  border: 16px solid transparent;
  border-image: linear-gradient(45deg, red , yellow);
  border-image-slice: 1;
  height: 120px;
  border-radius: 10px;  /* will have no effect */
}

instead of borders, I would use background gradients and padding. same look, but much easier, more supported.

a simple example:

.g {
background-image: -webkit-gradient(linear, left bottom, left top, color-stop(0.33, rgb(14,173,173)), color-stop(0.67, rgb(0,255,255)));
background-image: -moz-linear-gradient(center bottom, rgb(14,173,173) 33%, rgb(0,255,255) 67% );
padding: 2px;
}

.g > div { background: #fff; }
<div class="g">
    <div>bla</div>
</div>

EDIT: You can also leverage the :before selector as @WalterSchwarz pointed out:

body {
    padding: 20px;
}
.circle {
    width: 100%;
    height: 200px;
    background: linear-gradient(to top, #3acfd5 0%, #3a4ed5 100%);
    border-radius: 100%;
    position: relative;
    text-align: center;
    padding: 20px;
    box-sizing: border-box;
}
.circle::before {
    border-radius: 100%;
    content: '';
    background-image: linear-gradient(to bottom, #3acfd5 0%, #3a4ed5 100%);
    top: -10px;
    left: -10px;
    bottom: -10px;
    right: -10px;
    position: absolute;
    z-index:-1;
}
<div class="circle"></div>

Tags:

Css

Gradient

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