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POCompass/Sass function & mixin syntax
 

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  1. POCompass/Sass function & mixin syntax
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    <p>I'm currently writing my first mixin for Compass/Sass. After a short battle, I've got it to generate the exact CSS I need; hence my question isn't about fixing the output, but more about cleaning up the way I've done it.</p> <p>Here are two snippets of the code I'm using. The complete code generates a <code>background-image:</code> CSS rule with any number of comma-separated linear gradients, with <code>-webkit</code>, <code>moz</code>, and unprefixed gradient declarations in the latest W3C format (using <code>to top</code> rather than <code>bottom</code>, for example). </p> <p>As I said, I'm happy with the API and the output. I just want to clean up this code. </p> <p>Firstly, in the <code>w3c</code> conditional block below, how can I avoid what I want:</p> <pre><code>@return linear-gradient($direction, $color-stops); </code></pre> <p>... invoking the built-in Compass <code>linear-gradient</code> mixin? (I am including all the CSS3 Compass helpers in my project). All I want is to output a string, interpolating in the values of <code>$direction</code> and <code>$color-stops</code> inside the parentheses:</p> <pre><code>@function -gradient-rule($type, $direction, $color-stops) { @if $type == ('moz') { @return -moz-linear-gradient($direction, $color-stops); } @if $type == ('webkit') { @return -webkit-linear-gradient($direction, $color-stops); } @if $type == ('w3c') { // Terrible, terrible hack. Just couldn't work out how to write this without invoking the built-in Compass linear-gradient() function $prefix: linear-gradient; @return #{$prefix}unquote("(")#{$direction}, #{$color-stops}unquote(")"); } } </code></pre> <p>Secondly, is there a cleaner way of writing the code below? I want to loop all the <code>$gradients</code>, and for each <code>$gradient</code>, assume the first item is a direction declaration, and the rest are colour stops. So the first item should be set in the variable <code>$to-direction</code>, and the rest set in a comma-list named <code>$color-stops</code>. How can I do this better, i.e. without needing the <code>$i</code> counter?</p> <pre><code>@each $gradient in $gradients { $i: 1; $to-direction: nth($gradient, 1); $color-stops: comma-list(); @each $prop in $gradient { @if $i &gt; 1 { $color-stops: append($color-stops, $prop); } $i: $i+1; } // old syntax is the origin of the gradient, not the destination $from-direction: -from-direction($to-direction); $moz-value: append($moz-value, -gradient-rule('moz', $from-direction, $color-stops)); $webkit-value: append($webkit-value, -gradient-rule('webkit', $from-direction, $color-stops)); // new syntax is the destination $w3c-value: append($w3c-value, -gradient-rule('w3c', $to-direction, $color-stops)); ... (continues) } </code></pre> <p>Many thanks for any help you can give!</p>
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    1. USGeorge Crawford
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    1. COI'm unfamiliar with the Compass gradient mixin, what does your mixin do that's different?
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      1. POCompass/Sass function & mixin syntax
      1. UScimmanon
    2. COCan you throw all of your code up in a [codepen](http://codepen.io/)? Being able to play around will make things a lot easier : )
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      1. POCompass/Sass function & mixin syntax
      1. USNick Tomlin
 

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