<h2>Sass十分鐘入門</h2>
<h3>變量</h3>
<p>sass中可以定義變量，方便統一修改和維護。</p>
<div class="compare-code">
<pre><code>//sass style
//-----------------------------------
$fontStack: Helvetica, sans-serif;
$primaryColor: #333;
body {
font-family: $fontStack;
color: $primaryColor;
}
</code></pre>
<pre><code>//css style
//-----------------------------------
body {
font-family: Helvetica, sans-serif;
color: #333;
}
</code></pre>
</div>
<h3>嵌套</h3>
<p>sass可以進行選擇器的嵌套，表示層級關系，看起來很優雅整齊。</p>
<div class="compare-code">
<pre><code>//sass style
//-----------------------------------
nav {
ul {
margin: 0;
padding: 0;
list-style: none;
}
li { display: inline-block; }
a {
display: block;
padding: 6px 12px;
text-decoration: none;
}
}
</code></pre>
<pre><code>//css style
//-----------------------------------
nav ul {
margin: 0;
padding: 0;
list-style: none;
}
nav li {
display: inline-block;
}
nav a {
display: block;
padding: 6px 12px;
text-decoration: none;
}
</code></pre>
</div>
<h3>導入</h3>
<p>sass中如導入其他sass文件，最后編譯為一個css文件，優于純css的<code>@import</code></p>
<div class="compare-code">
<pre><code>//sass style
//-----------------------------------
// _reset.scss
html,
body,
ul,
ol {
margin: 0;
padding: 0;
}
</code></pre>
<pre><code>//sass style
//-----------------------------------
// base.scss
@import 'reset';
body {
font-size: 100% Helvetica, sans-serif;
background-color: #efefef;
}
</code></pre>
<pre><code>//css style
//-----------------------------------
html, body, ul, ol {
margin: 0;
padding: 0;
}
body {
background-color: #efefef;
font-size: 100% Helvetica, sans-serif;
}
</code></pre>
</div>
<h3>mixin</h3>
<p>sass中可用mixin定義一些代碼片段，且可傳參數，方便日后根據需求調用。從此處理css3的前綴兼容輕松便捷。</p>
<div class="compare-code">
<pre><code>//sass style
//-----------------------------------
@mixin box-sizing ($sizing) {
-webkit-box-sizing:$sizing;
-moz-box-sizing:$sizing;
box-sizing:$sizing;
}
.box-border{
border:1px solid #ccc;
@include box-sizing(border-box);
}
</code></pre>
<pre><code>//css style
//-----------------------------------
.box-border {
border: 1px solid #ccc;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
</code></pre>
</div>
<h3>擴展/繼承</h3>
<p>sass可通過<code>@extend</code>來實現代碼組合聲明，使代碼更加優越簡潔。</p>
<div class="compare-code">
<pre><code>//sass style
//-----------------------------------
.message {
border: 1px solid #ccc;
padding: 10px;
color: #333;
}
.success {
@extend .message;
border-color: green;
}
.error {
@extend .message;
border-color: red;
}
.warning {
@extend .message;
border-color: yellow;
}
</code></pre>
<pre><code>//css style
//-----------------------------------
.message, .success, .error, .warning {
border: 1px solid #cccccc;
padding: 10px;
color: #333;
}
.success {
border-color: green;
}
.error {
border-color: red;
}
.warning {
border-color: yellow;
}
</code></pre>
</div>
<h3>運算</h3>
<p>sass可進行簡單的加減乘除運算等</p>
<div class="compare-code">
<pre><code>//sass style
//-----------------------------------
.container { width: 100%; }
article[role="main"] {
float: left;
width: 600px / 960px * 100%;
}
aside[role="complimentary"] {
float: right;
width: 300px / 960px * 100%;
}
</code></pre>
<pre><code>//css style
//-----------------------------------
.container {
width: 100%;
}
article[role="main"] {
float: left;
width: 62.5%;
}
aside[role="complimentary"] {
float: right;
width: 31.25%;
}
</code></pre>
</div>
<h3>顏色</h3>
<p>sass中集成了大量的顏色函數，讓變換顏色更加簡單。</p>
<div class="compare-code">
<pre><code>//sass style
//-----------------------------------
$linkColor: #08c;
a {
text-decoration:none;
color:$linkColor;
&:hover{
color:darken($linkColor,10%);
}
}
</code></pre>
<pre><code>//css style
//-----------------------------------
a {
text-decoration: none;
color: #0088cc;
}
a:hover {
color: #006699;
}
</code></pre>
</div>
</div>
