在具有渐变背景的元素上应用透明边框时产生怪异效果 [英] Weird effect when applying transparent border over an element with a gradient background
问题描述
在以 linear-gradient
为背景的元素上应用透明边框时,我会得到怪异的效果.
请注意,元素的左侧和右侧没有正确的颜色(它们在某种程度上进行了切换),并且奇怪地是 flat .
HTML
< div class ="colors"></div>
CSS
.colors {宽度:100px;边框:10像素实心rgba(0,0,0,0.2);高度:50px;背景:线性渐变(向右,#78C5D6,#459BA8,#79C267,#C5D647,#F5D63D,#F08B33,#E868A2,#BE61A5);}
为什么在元素的左侧和右侧显示出怪异的效果,并且我能做什么?
这是小提琴: >
When applying a transparent border over an element with a linear-gradient
as the background, I get a weird effect.
Notice the left and right sides of the element don't have the proper colours (they're some way switched) and are weirdly flat.
HTML
<div class="colors">
</div>
CSS
.colors {
width: 100px;
border: 10px solid rgba(0,0,0,0.2);
height: 50px;
background: linear-gradient(to right,
#78C5D6,
#459BA8,
#79C267,
#C5D647,
#F5D63D,
#F08B33,
#E868A2,
#BE61A5);
}
Why is this showing a weird effect on the left and right side of the element, and What can I do about it?
Here is the fiddle: http://jsfiddle.net/fzndodgx/3/
That's because the starting and ending points of the gradient
are at the edges of the padding-box
and border
is rendered outside the padding-box
. So, the borders look funny because the background
is repeated on each side outside the padding-box
to cover the border-box
.
The box-shadow:inset
is rendered inside the padding-box
(just like background) and gives visually the same effect as a border
, so you could try using that in place of border
:
box-shadow: inset 0 0 0 10px rgba(0,0,0,0.2);
padding: 10px;
Because a box-shadow
doesn't take up any space, you need to increase your padding accordingly.
Illustration of padding-box
and border-box
:
Demo http://jsfiddle.net/ilpo/fzndodgx/5/
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