如何为此CSS径向渐变创建Sass mixin？

Question

我使用Ultimate CSS Gradient Generator形成放射状的梯度，并且它提供的萨斯包括，但是无法填写background-image mixin

的CSS

background: rgb(220,156,118); 
background: -moz-radial-gradient(center, ellipse cover, rgba(220,156,118,1) 0%, rgba(220,156,118,1) 49%, rgba(214,101,90,1) 92%, rgba(214,101,90,1) 100%); 
background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%,rgba(220,156,118,1)), color-stop(49%,rgba(220,156,118,1)), color-stop(92%,rgba(214,101,90,1)), color-stop(100%,rgba(214,101,90,1))); 
background: -webkit-radial-gradient(center, ellipse cover, rgba(220,156,118,1) 0%,rgba(220,156,118,1) 49%,rgba(214,101,90,1) 92%,rgba(214,101,90,1) 100%); 
background: -o-radial-gradient(center, ellipse cover, rgba(220,156,118,1) 0%,rgba(220,156,118,1) 49%,rgba(214,101,90,1) 92%,rgba(214,101,90,1) 100%); 
background: -ms-radial-gradient(center, ellipse cover, rgba(220,156,118,1) 0%,rgba(220,156,118,1) 49%,rgba(214,101,90,1) 92%,rgba(214,101,90,1) 100%); 
background: radial-gradient(ellipse at center, rgba(220,156,118,1) 0%,rgba(220,156,118,1) 49%,rgba(214,101,90,1) 92%,rgba(214,101,90,1) 100%); 
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#dc9c76', endColorstr='#d6655a',GradientType=1); 

这里是萨斯mixin @includes

background-color: rgb(220,156,118); 
@include filter-gradient(#dc9c76, #d6655a, horizontal); 
@include background-image(radial-gradient(center, ellipse cover, rgba(220,156,118,1)  0%,rgba(220,156,118,1) 49%,rgba(214,101,90,1) 92%,rgba(214,101,90,1) 100%)); 

我能够创建过滤器梯度的mixin

@mixin filter-gradient($color1, $color2, $direction){ 
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='$color1', endColorstr='$color2',GradientType=$direction);} 

但是还挺停留在创建混入对于径向渐变，因为颜色停止

@mixin background-image($gradient($position, $type, $rgba1, $rgba2, $rgba3, $rgba4){ 
    background: rgb(220,156,118); 
    background: -moz-$gradient(center, $type, $rgba1, $rgba2, $rgba3, $rgba4); 
    background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%,rgba(220,156,118,1)), color-stop(49%,rgba(220,156,118,1)), color-stop(92%,rgba(214,101,90,1)), color-stop(100%,rgba(214,101,90,1))); 
    background: -webkit-$gradient(center, $type, $rgba1, $rgba2, $rgba3, $rgba4); 
    background: -o-$gradient(center, $type, $rgba1, $rgba2, $rgba3, $rgba4); 
    background: -ms-$gradient(center, $type, $rgba1, $rgba2, $rgba3, $rgba4); 
    background: $gradient(ellipse at center, $rgba1, $rgba2, $rgba3, $rgba4); 
}; 

你会怎么写那些？

Answer 1

您应该试试Compass，它是一组有用的混合（如渐变）应用跨浏览器行为的最佳实践。

radial-gradient($color-stops, $center-position, $image) 

由于webkit的限制，如果您使用基于像素的颜色停止，径向渐变mixin效果最佳。

Examples: 

// Defaults to a centered, 100px radius gradient 
+radial-gradient(color-stops(#c00, #00c)) 

// 100px radius gradient in the top left corner 
+radial-gradient(color-stops(#c00, #00c), top left) 

// Three colors, ending at 50px and passing thru #fff at 25px 
+radial-gradient(color-stops(#c00, #fff, #00c 50px)) 

// A background image on top of a 100px radius gradient; requires an image 
// with an alpha-layer. 
+radial-gradient(color_stops(#c00, #fff), top left, image-url("noise.png"))) 

支持的浏览器：

• 铬
• Safari浏览器
• 火狐3.6 歌剧