问题

I\'m trying to apply a gradient to a border, I thought it was as simple as doing this:

border-color: -moz-linear-gradient(top, #555555, #111111);

But this does not work.

Does anyone know what is the correct way to do border gradients?

回答1:

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

回答2:

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%);
    padding: 10px;
    width: 100%;
    height:100%;
    top: -10px;
    left: -10px;
    position:absolute;
    z-index:-1;
}

<div class="circle">Test</div>

回答3:

`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.

  border-bottom: 6px solid transparent;
  border-image: linear-gradient(to right, red , yellow);
  border-image-slice: 1;

回答4:

Mozilla currently only supports CSS gradients as values of the background-image property, as well as within the shorthand background.

— https://developer.mozilla.org/en/CSS/-moz-linear-gradient

Example 3 - Gradient Borders

border: 8px solid #000;
-moz-border-bottom-colors: #555 #666 #777 #888 #999 #aaa #bbb #ccc;
-moz-border-top-colors: #555 #666 #777 #888 #999 #aaa #bbb #ccc;
-moz-border-left-colors: #555 #666 #777 #888 #999 #aaa #bbb #ccc;
-moz-border-right-colors: #555 #666 #777 #888 #999 #aaa #bbb #ccc;
padding: 5px 5px 5px 15px;

— http://www.cssportal.com/css3-preview/borders.htm

回答5:

Try this, works fine on web-kit

.border { 
    width: 400px;
    padding: 20px;
    border-top: 10px solid #FFFF00;
    border-bottom:10px solid #FF0000;
    background-image: 
        linear-gradient(#FFFF00, #FF0000),
        linear-gradient(#FFFF00, #FF0000)
    ;
    background-size:10px 100%;
    background-position:0 0, 100% 0;
    background-repeat:no-repeat;
}

<div class="border">Hello!</div>

回答6:

It's a hack, but you can achieve this effect in some cases by using the background-image to specify the gradient and then masking the actual background with a box-shadow. For example:

p {
  display: inline-block;
  width: 50px;
  height: 50px;
  /* The background is used to specify the border background */
  background: -moz-linear-gradient(45deg, #f00, #ff0);
  background: -webkit-linear-gradient(45deg, #f00, #ff0);
  /* Background origin is the padding box by default.
  Override to make the background cover the border as well. */
  -moz-background-origin: border;
  background-origin: border-box;
  /* A transparent border determines the width */
  border: 4px solid transparent;
  border-radius: 8px;
  box-shadow:
    inset 0 0 12px #0cc, /* Inset shadow */
    0 0 12px #0cc, /* Outset shadow */
    inset -999px 0 0 #fff; /* The background color */
}

From: http://blog.nateps.com/the-elusive-css-border-gradient

回答7:

I agree with szajmon. The only problem with his and Quentin's answers is cross-browser compatibility.

HTML:

<div class="g">
    <div>bla</div>
</div>

CSS:

.g {
background-image: -webkit-linear-gradient(300deg, white, black, white); /* webkit browsers (Chrome & Safari) */
background-image: -moz-linear-gradient(300deg, white, black, white); /* Mozilla browsers (Firefox) */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff', endColorstr='#000000', gradientType='1'); /* Internet Explorer */
background-image: -o-linear-gradient(300deg,rgb(255,255,255),rgb(0,0,0) 50%,rgb(255,255,255) 100%); /* Opera */
}

.g > div { background: #fff; }

回答8:

Webkit supports gradients in borders, and now accepts the gradient in the Mozilla format.

Firefox claims to support gradients in two ways:

Using border-image with border-image-source
Using border-right-colors (right/left/top/bottom)

IE9 has no support.

回答9:

Another hack for achieving the same effect is to utilize multiple background images, a feature that is supported in IE9+, newish Firefox, and most WebKit-based browsers: http://caniuse.com/#feat=multibackgrounds

There are also some options for using multiple backgrounds in IE6-8: http://www.beyondhyper.com/css3-multiple-backgrounds-in-non-supportive-browsers/

For example, suppose you want a 5px-wide left border that is a linear gradient from blue to white. Create the gradient as an image and export to a PNG. List any other CSS backgrounds after the one for the left border gradient:

#theBox {
    background:
        url(/images/theBox-leftBorderGradient.png) left no-repeat,
        ...;
}

You can adapt this technique to top, right, and bottom border gradients by changing the background position part of the background shorthand property.

Here is a jsFiddle for the given example: http://jsfiddle.net/jLnDt/

回答10:

Gradient Borders from Css-Tricks: http://css-tricks.com/examples/GradientBorder/

.multbg-top-to-bottom {
  border-top: 3px solid black;
  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#000), to(transparent));
  background-image: -webkit-linear-gradient(#000, transparent);
  background-image:
      -moz-linear-gradient(#000, transparent),
      -moz-linear-gradient(#000, transparent);
  background-image:
      -o-linear-gradient(#000, transparent),
      -o-linear-gradient(#000, transparent);
  background-image: 
      linear-gradient(#000, transparent),
      linear-gradient(#000, transparent);
  -moz-background-size: 3px 100%;
  background-size: 3px 100%;
  background-position: 0 0, 100% 0;
  background-repeat: no-repeat; 
}

回答11:

Try this, it worked for me.

.yourDivClass {
    border: 1px solid transparent;
    border-image: linear-gradient(to top, #3a4ed5 0%, #f2f2f2 100%);
    border-image-slice: 1;
}

The link is to the fiddle https://jsfiddle.net/yash009/kayjqve3/1/ hope this helps

回答12:

For cross-browser support you can try as well imitate a gradient border with :before or :after pseudo elements, depends on what you want to do.

回答13:

Example for Gradient Border

Using border-image css property

Credits to : border-image in Mozilla

.grad-border {
  height: 1px;
  width: 85%;
  margin: 0 auto;
  display: flex;
}
.left-border, .right-border {
  width: 50%;
  border-bottom: 2px solid #695f52;
  display: inline-block;
}
.left-border {
  border-image: linear-gradient(270deg, #b3b3b3, #fff) 1;
}
.right-border {
  border-image: linear-gradient(90deg, #b3b3b3, #fff) 1;
}

<div class="grad-border">
  <div class="left-border"></div>
  <div class="right-border"></div>
</div>

回答14:

Try the below example:

.border-gradient {
      border-width: 5px 5px 5px 5px;
      border-image: linear-gradient(45deg, rgba(100,57,242,1) 0%, rgba(242,55,55,1) 100%);
      border-image-slice: 9;
      border-style: solid;
}

回答15:

try this code

.gradientBoxesWithOuterShadows { 
height: 200px;
width: 400px; 
padding: 20px;
background-color: white; 

/* outer shadows  (note the rgba is red, green, blue, alpha) */
-webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.4); 
-moz-box-shadow: 0px 1px 6px rgba(23, 69, 88, .5);

/* rounded corners */
-webkit-border-radius: 12px;
-moz-border-radius: 7px; 
border-radius: 7px;

/* gradients */
background: -webkit-gradient(linear, left top, left bottom, 
color-stop(0%, white), color-stop(15%, white), color-stop(100%, #D7E9F5)); 
background: -moz-linear-gradient(top, white 0%, white 55%, #D5E4F3 130%); 
}

or maybe refer to this fiddle: http://jsfiddle.net/necolas/vqnk9/

回答16:

Here's a nice semi cross-browser way to have gradient borders that fade out half way down. Simply by setting the color-stop to rgba(0, 0, 0, 0)

.fade-out-borders {
min-height: 200px; /* for example */

-webkit-border-image: -webkit-gradient(linear, 0 0, 0 50%, from(black), to(rgba(0, 0, 0, 0))) 1 100%;
-webkit-border-image: -webkit-linear-gradient(black, rgba(0, 0, 0, 0) 50%) 1 100%;
-moz-border-image: -moz-linear-gradient(black, rgba(0, 0, 0, 0) 50%) 1 100%;
-o-border-image: -o-linear-gradient(black, rgba(0, 0, 0, 0) 50%) 1 100%;
border-image: linear-gradient(to bottom, black, rgba(0, 0, 0, 0) 50%) 1 100%;
}

<div class="fade-out-border"></div>

Usage explained:

Formal grammar: linear-gradient(  [ <angle> | to <side-or-corner> ,]? <color-stop> [, <color-stop>]+ )
                              \---------------------------------/ \----------------------------/
                                Definition of the gradient line         List of color stops

More here: https://developer.mozilla.org/en-US/docs/Web/CSS/linear-gradient

回答17:

There is a nice css tricks article about this here: https://css-tricks.com/gradient-borders-in-css/

I was able to come up with a pretty simple, single element, solution to this using multiple backgrounds and the background-origin property.

.wrapper {
  background: linear-gradient(#222, #222), 
              linear-gradient(to right, red, purple);
  background-origin: padding-box, border-box;
  background-repeat: no-repeat; /* this is important */
  border: 5px solid transparent;
}

The nice things about this approach are:

It isn’t affected by z-index
It can scale easily by just changing the width of the transparent border

Check it out: https://codepen.io/AlexOverbeck/pen/axGQyv?editors=1100

来源：https://stackoverflow.com/questions/2717127/gradient-borders

标签

css

css3

gradient

Gradient borders

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