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sass+require實作側邊欄

WBOY
WBOY原創
2016-09-23 03:30:121090瀏覽

 

一、效果圖(如下)及使用的技術

    實作sass實作頁面中右側固定側邊欄的樣式,用require.js實作回到頂端的功能

二、sass

    具體的sass的介紹就不多說了,大家可以參考sass官網介紹,下面說一下sass的兩種編譯方法;

    a、koala編譯

      koala 是一個桌面程序,支援 less 、 sass 、 coffeescript 即時編譯。下載網址:http://koala-app.com/

      

     koala可以直接對scss進行編譯,不需要敲擊指令,並且可以對scss進行監控,具體使用方法請見:http://www.w3cplus.com/preprocessor/sass-gui-tool-koala.html

   註:此種編譯方法比較方便,只要下載koalo即可,新建*.scss文件,拖進工作區點擊”完成“,即可,並且可以監控添加到工作區的文件,不用每次點擊編譯;

  b、sass指令編譯(建議)

    此方法需要以下步驟:

    (1)因為sass依賴ruby環境,所以裝sass之前先確認裝了ruby。官網下載:ruby;

            安裝的時候,請勾選Add Ruby executables to your PATH這個選項,新增環境變量,不然以後使用編譯軟體的時候會提示找不到ruby環境

            

      (2)安裝完ruby之後,在開始功能表中,找到剛才我們安裝的ruby,開啟Start Command Prompt with Ruby

            

          然後在命令列直接輸入:

<span style="color: #008080;"> gem install sass</span>

          依回車安裝,若安裝不成功,可直接在http://www.w3cplus.com/sassguide/install.html 下載圖中的「sass安裝檔」

          

     下載之後放到ruby的安裝目錄下的gems資料夾中即可(如下圖)

 

     

 

     安裝完成後可在命令列中輸入指令:

       * 查看sass版本的命令行為

sass -v

 

       * 你也可以執行幫助命令列來查看你需要的命令

sass -h

       * 單一檔案轉換指令

  sass style.scss style.css

      * 單一檔案監聽指令

sass --watch style.scss:style.css

       * 資料夾監聽指令

sass --watch sassFileDirectory:cssFileDirectory

三、require.js使用基礎

       新建目錄,結構如下

       

       目錄toolbar下有index.html、jquery-1.11.3js、main.js、require.js。 require.js和jquery-1.11.3.js去各自官網下載即可。

       index.html如下:

<span style="color: #008080;"> 1</span> <span style="color: #0000ff;"><!</span><span style="color: #ff00ff;">doctype html</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 2</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 3</span>     <span style="color: #0000ff;"><</span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 4</span>         <span style="color: #0000ff;"><</span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>requirejs<span style="color: #0000ff;"></</span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 5</span>         <span style="color: #0000ff;"><</span><span style="color: #800000;">meta </span><span style="color: #ff0000;">charset</span><span style="color: #0000ff;">="utf-8"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 6</span>         <span style="color: #0000ff;"><</span><span style="color: #800000;">script </span><span style="color: #ff0000;">data-main</span><span style="color: #0000ff;">="js/main"</span><span style="color: #ff0000;"> src</span><span style="color: #0000ff;">="js/require.js"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">script</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 7</span>     <span style="color: #0000ff;"></</span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 8</span>     <span style="color: #0000ff;"><</span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 9</span>      
<span style="color: #008080;">10</span>     <span style="color: #0000ff;"></</span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">11</span> <span style="color: #0000ff;"></</span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">12</span>   

 

      使用requirejs很簡單,只需要在head中透過script標籤引入它(實際上除了require.js,其它檔案模組都不再使用script標籤引入)。

      細心的同學會發現script標籤上了多了一個自訂屬性:data-main="main",等號右邊的main指的main.js。當然可以使用任意的名稱。

      這個main指主模組或入口模組,好比c或java的主函數main。

      main.js如下

<span style="color: #008080;">1</span> <span style="color: #000000;">require.config({
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    paths: {
</span><span style="color: #008080;">3</span>         jquery: 'jquery-1.11.3'<span style="color: #008000;">//</span><span style="color: #008000;">此处用不用添加.js后缀,否则执行的时候会报错</span>
<span style="color: #008080;">4</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">5</span> <span style="color: #000000;">});
</span><span style="color: #008080;">6</span>  
<span style="color: #008080;">7</span> require(['jquery'], <span style="color: #0000ff;">function</span><span style="color: #000000;">($) {
</span><span style="color: #008080;">8</span> <span style="color: #000000;">    alert($().jquery);
</span><span style="color: #008080;">9</span> });

 

     main.js中就两个函数调用require.config和require。

     require.config用来配置一些参数,它将影响到requirejs库的一些行为。

     require.config的参数是一个JS对象,常用的配置有baseUrl,paths等。

     这里配置了paths参数,使用模块名“jquery”,其实际文件路径jquery-1.11.3.js(后缀.js可以省略)。

 

     注:有些同学习惯用npm 来下载相关文件,在这里有一点需要注意的是:

     下载require.js的命令是:

npm install requirejs

     而不是( 注 意 )

npm install require.js   

 

四、功能实现

      项目目录结构如下:

      

      在命令行输入命令如下,对scss文件夹进行监听并将scss中的scss文件编译到css文件夹中;

     

1、html部分:

<span style="color: #008080;">  1</span> <span style="color: #0000ff;"><!</span><span style="color: #ff00ff;">DOCTYPE html</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">  2</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">html </span><span style="color: #ff0000;">lang</span><span style="color: #0000ff;">="en"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">  3</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">  4</span>     <span style="color: #0000ff;"><</span><span style="color: #800000;">meta </span><span style="color: #ff0000;">charset</span><span style="color: #0000ff;">="UTF-8"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">  5</span>     <span style="color: #0000ff;"><</span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>toolbar<span style="color: #0000ff;"></</span><span style="color: #800000;">title</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">  6</span>     <span style="color: #0000ff;"><</span><span style="color: #800000;">link </span><span style="color: #ff0000;">rel</span><span style="color: #0000ff;">="stylesheet"</span><span style="color: #ff0000;"> href</span><span style="color: #0000ff;">="css/index.css"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">  7</span> 
<span style="color: #008080;">  8</span> <span style="color: #0000ff;"></</span><span style="color: #800000;">head</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">  9</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 10</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="toolbar"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 11</span>     <span style="color: #0000ff;"><</span><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="javascript:;"</span><span style="color: #ff0000;"> class</span><span style="color: #0000ff;">="toolbar-item toolbar-item-weixin"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 12</span>         <span style="color: #0000ff;"><</span><span style="color: #800000;">span </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="toolbar-layout"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">span</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 13</span>     <span style="color: #0000ff;"></</span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 14</span>     <span style="color: #0000ff;"><</span><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="javascript:;"</span><span style="color: #ff0000;">  class</span><span style="color: #0000ff;">="toolbar-item toolbar-item-feedback"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 15</span>     <span style="color: #0000ff;"><</span><span style="color: #800000;">a </span><span style="color: #ff0000;">href</span><span style="color: #0000ff;">="javascript:;"</span><span style="color: #ff0000;">  class</span><span style="color: #0000ff;">="toolbar-item toolbar-item-app"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 16</span>         <span style="color: #0000ff;"><</span><span style="color: #800000;">span </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="toolbar-layout"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">span</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 17</span>     <span style="color: #0000ff;"></</span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 18</span>     <span style="color: #0000ff;"><</span><span style="color: #800000;">a </span><span style="color: #ff0000;">id</span><span style="color: #0000ff;">="backTop"</span><span style="color: #ff0000;"> href</span><span style="color: #0000ff;">="javascript:;"</span><span style="color: #ff0000;">  class</span><span style="color: #0000ff;">="toolbar-item toolbar-item-top"</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 19</span>         <span style="color: #0000ff;"><</span><span style="color: #800000;">span </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="toolbar-btn"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">span</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 20</span>     <span style="color: #0000ff;"></</span><span style="color: #800000;">a</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 21</span> <span style="color: #0000ff;"></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 22</span> <span style="color: #008000;"><!--</span><span style="color: #008000;">下面部分是为了使页面出现滚动条,方便测试</span><span style="color: #008000;">--></span>
<span style="color: #008080;"> 23</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>测试<span style="color: #0000ff;"></</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 24</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>测试<span style="color: #0000ff;"></</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 25</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>测试<span style="color: #0000ff;"></</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>
<span style="color: #008080;"> 26</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>测试<span style="color: #0000ff;"></</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">       ...</span>
<span style="color: #008080;">119</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>测试<span style="color: #0000ff;"></</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">120</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>测试<span style="color: #0000ff;"></</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">121</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>测试<span style="color: #0000ff;"></</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">122</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>测试<span style="color: #0000ff;"></</span><span style="color: #800000;">p</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">123</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">script </span><span style="color: #ff0000;">src</span><span style="color: #0000ff;">="js/require.js"</span><span style="color: #ff0000;"> data-main</span><span style="color: #0000ff;">="js/main"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">script</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">124</span> <span style="color: #0000ff;"></</span><span style="color: #800000;">body</span><span style="color: #0000ff;">></span>
<span style="color: #008080;">125</span> <span style="color: #0000ff;"></</span><span style="color: #800000;">html</span><span style="color: #0000ff;">></span>

 

 2、css & scss部分:   

   scss文件夹中的:

         (1) _mixin.scss: scss可以像js一样,将一些公共的样式封装成函数,便于重复利用

<span style="color: #008080;"> 1</span> <span style="color: #800000;">@mixin opacity($opacity)</span>{
<span style="color: #008080;"> 2</span> <span style="color: #ff0000;">  opacity</span>:<span style="color: #0000ff;"> $opacity</span>;
<span style="color: #008080;"> 3</span> <span style="color: #ff0000;">  filter</span>:<span style="color: #0000ff;"> opacity($opacity * 100)</span>;
<span style="color: #008080;"> 4</span> }
<span style="color: #008080;"> 5</span> <span style="color: #800000;">@mixin transform-origin ($transform-origin)</span>{
<span style="color: #008080;"> 6</span> <span style="color: #ff0000;">  transform-origin</span>:<span style="color: #0000ff;"> $transform-origin</span>;
<span style="color: #008080;"> 7</span> <span style="color: #ff0000;">  -webkit-transform-origin</span>:<span style="color: #0000ff;"> $transform-origin</span>;
<span style="color: #008080;"> 8</span> <span style="color: #ff0000;">  -o-transform-origin</span>:<span style="color: #0000ff;"> $transform-origin</span>;
<span style="color: #008080;"> 9</span> <span style="color: #ff0000;">  -ms-transform-origin</span>:<span style="color: #0000ff;"> $transform-origin</span>;
<span style="color: #008080;">10</span> <span style="color: #ff0000;">  -moz-transform-origin</span>:<span style="color: #0000ff;"> $transform-origin</span>;
<span style="color: #008080;">11</span> }
<span style="color: #008080;">12</span> <span style="color: #800000;">@mixin scale($scale)</span>{
<span style="color: #008080;">13</span> <span style="color: #ff0000;">  transform</span>:<span style="color: #0000ff;"> scale($scale)</span>;
<span style="color: #008080;">14</span> <span style="color: #ff0000;">  -webkit-transform</span>:<span style="color: #0000ff;"> scale($scale)</span>;
<span style="color: #008080;">15</span> <span style="color: #ff0000;">  -o-transform</span>:<span style="color: #0000ff;"> scale($scale)</span>;
<span style="color: #008080;">16</span> <span style="color: #ff0000;">  -ms-transform</span>:<span style="color: #0000ff;"> scale($scale)</span>;
<span style="color: #008080;">17</span> <span style="color: #ff0000;">  -moz-transform</span>:<span style="color: #0000ff;"> scale($scale)</span>;
<span style="color: #008080;">18</span> }
<span style="color: #008080;">19</span> <span style="color: #800000;">@mixin transition($transition)</span>{
<span style="color: #008080;">20</span> <span style="color: #ff0000;">  transition</span>:<span style="color: #0000ff;"> $transition</span>;
<span style="color: #008080;">21</span> <span style="color: #ff0000;">  -webkit-transition</span>:<span style="color: #0000ff;"> $transition</span>;
<span style="color: #008080;">22</span> <span style="color: #ff0000;">  -o-transition</span>:<span style="color: #0000ff;"> $transition</span>;
<span style="color: #008080;">23</span> <span style="color: #ff0000;">  -ms-transition</span>:<span style="color: #0000ff;"> $transition</span>;
<span style="color: #008080;">24</span> <span style="color: #ff0000;">  -moz-transition</span>:<span style="color: #0000ff;"> $transition</span>;
<span style="color: #008080;">25</span> }

     (2) toobar.scss : 该模块中的自有样式(只在自个模块中使用的)

     

<span style="color: #008080;"> 1</span> <span style="color: #800000;">@import "mixin";
</span><span style="color: #008080;"> 2</span> <span style="color: #800000;">@mixin toolbar-item($pos,$hoverPos)</span>{
<span style="color: #008080;"> 3</span> <span style="color: #ff0000;">  background-position</span>:<span style="color: #0000ff;"> 0 $pos</span>;
<span style="color: #008080;"> 4</span> <span style="color: #ff0000;">  &</span>:<span style="color: #0000ff;">hover {
</span><span style="color: #008080;"> 5</span> <span style="color: #0000ff;">    background-position: 0 $hoverPos</span>;
<span style="color: #008080;"> 6</span>   }
<span style="color: #008080;"> 7</span> 
<span style="color: #008080;"> 8</span> <span style="color: #800000;">}
</span><span style="color: #008080;"> 9</span> <span style="color: #800000;">$toolbar-size: 52px;
</span><span style="color: #008080;">10</span> 
<span style="color: #008080;">11</span> <span style="color: #800000;">.toolbar-item, .toolbar-layout </span>{
<span style="color: #008080;">12</span> <span style="color: #ff0000;">  background-image</span>:<span style="color: #0000ff;"> url(../img/toolbar.png)</span>;
<span style="color: #008080;">13</span> <span style="color: #ff0000;">  background-repeat</span>:<span style="color: #0000ff;"> no-repeat</span>;
<span style="color: #008080;">14</span> }
<span style="color: #008080;">15</span> <span style="color: #800000;">.toolbar </span>{
<span style="color: #008080;">16</span> <span style="color: #ff0000;">  position</span>:<span style="color: #0000ff;"> fixed</span>;
<span style="color: #008080;">17</span> <span style="color: #ff0000;">  left</span>:<span style="color: #0000ff;"> 50%</span>;
<span style="color: #008080;">18</span> <span style="color: #ff0000;">  bottom</span>:<span style="color: #0000ff;"> 100px</span>;
<span style="color: #008080;">19</span> <span style="color: #ff0000;">  margin-left</span>:<span style="color: #0000ff;"> -$toolbar-size / 2</span>;
<span style="color: #008080;">20</span> }
<span style="color: #008080;">21</span> <span style="color: #800000;">.toolbar-item </span>{
<span style="color: #008080;">22</span> <span style="color: #ff0000;">  position</span>:<span style="color: #0000ff;"> relative</span>;
<span style="color: #008080;">23</span> <span style="color: #ff0000;">  display</span>:<span style="color: #0000ff;"> block</span>;
<span style="color: #008080;">24</span> <span style="color: #ff0000;">  width</span>:<span style="color: #0000ff;"> $toolbar-size</span>;
<span style="color: #008080;">25</span> <span style="color: #ff0000;">  height</span>:<span style="color: #0000ff;"> $toolbar-size</span>;
<span style="color: #008080;">26</span> <span style="color: #ff0000;">  margin-top</span>:<span style="color: #0000ff;"> 1px</span>;
<span style="color: #008080;">27</span> 
<span style="color: #008080;">28</span> <span style="color: #ff0000;">  @include transition(background-position 1s);
</span><span style="color: #008080;">29</span> <span style="color: #ff0000;">  &</span>:<span style="color: #0000ff;">hover {
</span><span style="color: #008080;">30</span> <span style="color: #0000ff;">    .toolbar-layout {
</span><span style="color: #008080;">31</span> <span style="color: #0000ff;">      @include opacity(1)</span>;
<span style="color: #008080;">32</span> <span style="color: #ff0000;">      @include scale(1);
</span><span style="color: #008080;">33</span> <span style="color: #ff0000;">      @include transition(all 1s);
</span><span style="color: #008080;">34</span>     }
<span style="color: #008080;">35</span> <span style="color: #800000;">  }
</span><span style="color: #008080;">36</span> 
<span style="color: #008080;">37</span> <span style="color: #800000;">}
</span><span style="color: #008080;">38</span> <span style="color: #800000;">.toolbar-layout </span>{
<span style="color: #008080;">39</span> <span style="color: #ff0000;">  position</span>:<span style="color: #0000ff;"> absolute</span>;
<span style="color: #008080;">40</span> <span style="color: #ff0000;">  right</span>:<span style="color: #0000ff;"> $toolbar-size - 5</span>;
<span style="color: #008080;">41</span> <span style="color: #ff0000;">  bottom</span>:<span style="color: #0000ff;"> 0</span>;
<span style="color: #008080;">42</span> <span style="color: #ff0000;">  width</span>:<span style="color: #0000ff;"> 172px</span>;
<span style="color: #008080;">43</span> <span style="color: #ff0000;">  @include transform-origin(95% 95%);
</span><span style="color: #008080;">44</span> <span style="color: #ff0000;">  @include opacity(0);
</span><span style="color: #008080;">45</span> <span style="color: #ff0000;">  @include scale(0.01);
</span><span style="color: #008080;">46</span> <span style="color: #ff0000;">  @include transition(all 1s);
</span><span style="color: #008080;">47</span> 
<span style="color: #008080;">48</span> }
<span style="color: #008080;">49</span> <span style="color: #800000;">.toolbar-item-weixin </span>{
<span style="color: #008080;">50</span> <span style="color: #ff0000;">  @include toolbar-item(-798px, -860px);
</span><span style="color: #008080;">51</span> 
<span style="color: #008080;">52</span> <span style="color: #ff0000;">  .toolbar-layout {
</span><span style="color: #008080;">53</span> <span style="color: #ff0000;">    height</span>:<span style="color: #0000ff;"> 212px</span>;
<span style="color: #008080;">54</span> <span style="color: #ff0000;">    background-position</span>:<span style="color: #0000ff;"> 0 0</span>;
<span style="color: #008080;">55</span>   }
<span style="color: #008080;">56</span> <span style="color: #800000;">}
</span><span style="color: #008080;">57</span> 
<span style="color: #008080;">58</span> <span style="color: #800000;">.toolbar-item-feedback </span>{
<span style="color: #008080;">59</span> <span style="color: #ff0000;">  @include toolbar-item(-426px,-488px);
</span><span style="color: #008080;">60</span> 
<span style="color: #008080;">61</span> }
<span style="color: #008080;">62</span> <span style="color: #800000;">.toolbar-item-app </span>{
<span style="color: #008080;">63</span> <span style="color: #ff0000;">  @include toolbar-item(-550px,-612px);
</span><span style="color: #008080;">64</span> 
<span style="color: #008080;">65</span> <span style="color: #ff0000;">  .toolbar-layout {
</span><span style="color: #008080;">66</span> <span style="color: #ff0000;">    height</span>:<span style="color: #0000ff;"> 194px</span>;
<span style="color: #008080;">67</span> <span style="color: #ff0000;">    background-position</span>:<span style="color: #0000ff;"> 0 -222</span>;
<span style="color: #008080;">68</span>   }
<span style="color: #008080;">69</span> <span style="color: #800000;">}
</span><span style="color: #008080;">70</span> <span style="color: #800000;">.toolbar-item-top </span>{
<span style="color: #008080;">71</span> <span style="color: #ff0000;">  @include toolbar-item(-674px,-736px);
</span><span style="color: #008080;">72</span>   
<span style="color: #008080;">73</span> }

    (3) index.scss: 该项目引入的样式文件,编译后为index.css,在html中只引入index.css,便于文件管理

    

<span style="color: #008080;">1</span> <span style="color: #800000;">@import "toolbar";</span>

  3、js部分:

   (1)jquery-1.11.3.js和require.js是该项目的依赖,可从各自官网下载,也可以通过npm下载,html中只引入require.js即可

   (2)main.js是项目的入口文件

<span style="color: #000000;">require.config({
  paths:{
    jquery:</span>"./jquery-1.11.3"<span style="color: #000000;">
  }

});

require([</span>'jquery',"backtop"],<span style="color: #0000ff;">function</span><span style="color: #000000;"> ($,backTop) {
  </span><span style="color: #0000ff;">var</span> backTop = <span style="color: #0000ff;">new</span> backTop.BackTop($("#backTop"<span style="color: #000000;">),{//构造函数实例化
    mode:</span>"move"<span style="color: #000000;">,
    dest:</span>0<span style="color: #000000;">,
    speed:</span>500<span style="color: #000000;">
  });
});</span>

  (3)backtop.js:

<span style="color: #008080;"> 1</span> define(["jquery","scrollTo"],<span style="color: #0000ff;">function</span><span style="color: #000000;">($,scrollTo){
</span><span style="color: #008080;"> 2</span> 
<span style="color: #008080;"> 3</span>   <span style="color: #0000ff;">function</span><span style="color: #000000;"> BackTop(el,opts){
</span><span style="color: #008080;"> 4</span> 
<span style="color: #008080;"> 5</span>     <span style="color: #0000ff;">this</span>.opts =<span style="color: #000000;"> $.extend({},BackTop.defaults,opts);
</span><span style="color: #008080;"> 6</span>     <span style="color: #0000ff;">this</span>.$el =<span style="color: #000000;">$(el);
</span><span style="color: #008080;"> 7</span> 
<span style="color: #008080;"> 8</span>     <span style="color: #0000ff;">this</span>.scroll = <span style="color: #0000ff;">new</span><span style="color: #000000;"> scrollTo.ScrollTo({
</span><span style="color: #008080;"> 9</span>       dest: 0<span style="color: #000000;">,
</span><span style="color: #008080;">10</span>       speed:<span style="color: #0000ff;">this</span><span style="color: #000000;">.opts.speed
</span><span style="color: #008080;">11</span> <span style="color: #000000;">    });
</span><span style="color: #008080;">12</span> 
<span style="color: #008080;">13</span>     <span style="color: #0000ff;">if</span>(<span style="color: #0000ff;">this</span>.opts.mode === "move"<span style="color: #000000;">){
</span><span style="color: #008080;">14</span>       <span style="color: #0000ff;">this</span>.$el.on("click", $.proxy(<span style="color: #0000ff;">this</span>._move,<span style="color: #0000ff;">this</span>));<span style="color: #008000;">//</span><span style="color: #008000;">改变this指向</span>
<span style="color: #008080;">15</span> 
<span style="color: #008080;">16</span>     }<span style="color: #0000ff;">else</span><span style="color: #000000;"> {
</span><span style="color: #008080;">17</span>       <span style="color: #0000ff;">this</span>.$el.on("click", $.proxy(<span style="color: #0000ff;">this</span>._go,<span style="color: #0000ff;">this</span>));<span style="color: #008000;">//</span><span style="color: #008000;">改变this指向</span>
<span style="color: #008080;">18</span> 
<span style="color: #008080;">19</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">20</span> 
<span style="color: #008080;">21</span>     <span style="color: #0000ff;">this</span><span style="color: #000000;">._checkPosition();
</span><span style="color: #008080;">22</span>     $(window).on("scroll",$.proxy(<span style="color: #0000ff;">this</span>._checkPosition,<span style="color: #0000ff;">this</span><span style="color: #000000;">));
</span><span style="color: #008080;">23</span> 
<span style="color: #008080;">24</span> <span style="color: #000000;">  };
</span><span style="color: #008080;">25</span> 
<span style="color: #008080;">26</span> 
<span style="color: #008080;">27</span> 
<span style="color: #008080;">28</span>   BackTop.defaults =<span style="color: #000000;"> {
</span><span style="color: #008080;">29</span>     mode:'move',<span style="color: #008000;">//</span><span style="color: #008000;">返回顶部的方式,直接返回还是动画返回</span>
<span style="color: #008080;">30</span>     pos:$(window).height(),<span style="color: #008000;">//</span><span style="color: #008000;">返回顶部按钮显示隐藏的初始值</span>
<span style="color: #008080;">31</span>     speed:800
<span style="color: #008080;">32</span> <span style="color: #000000;">  }
</span><span style="color: #008080;">33</span> 
<span style="color: #008080;">34</span>   BackTop.prototype._move = <span style="color: #0000ff;">function</span><span style="color: #000000;">(){
</span><span style="color: #008080;">35</span>     <span style="color: #0000ff;">this</span><span style="color: #000000;">.scroll.move();
</span><span style="color: #008080;">36</span> <span style="color: #000000;">  }
</span><span style="color: #008080;">37</span>   BackTop.prototype._go = <span style="color: #0000ff;">function</span><span style="color: #000000;">(){
</span><span style="color: #008080;">38</span>     <span style="color: #0000ff;">this</span><span style="color: #000000;">.scroll.go();
</span><span style="color: #008080;">39</span> <span style="color: #000000;">  }
</span><span style="color: #008080;">40</span>   BackTop.prototype._checkPosition = <span style="color: #0000ff;">function</span><span style="color: #000000;">(){
</span><span style="color: #008080;">41</span> 
<span style="color: #008080;">42</span>     <span style="color: #0000ff;">var</span> $el = <span style="color: #0000ff;">this</span><span style="color: #000000;">.$el;
</span><span style="color: #008080;">43</span> 
<span style="color: #008080;">44</span>     <span style="color: #0000ff;">if</span>($(window).scrollTop() > <span style="color: #0000ff;">this</span><span style="color: #000000;">.opts.pos){
</span><span style="color: #008080;">45</span> 
<span style="color: #008080;">46</span> <span style="color: #000000;">      $el.fadeIn();
</span><span style="color: #008080;">47</span>     }<span style="color: #0000ff;">else</span><span style="color: #000000;"> {
</span><span style="color: #008080;">48</span> <span style="color: #000000;">      $el.fadeOut();
</span><span style="color: #008080;">49</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">50</span> <span style="color: #000000;">  };
</span><span style="color: #008080;">51</span> 
<span style="color: #008080;">52</span>   <span style="color: #0000ff;">return</span><span style="color: #000000;"> {BackTop:BackTop}
</span><span style="color: #008080;">53</span> 
<span style="color: #008080;">54</span> });

(4)scrollTo.js

<span style="color: #008080;"> 1</span> define(["jquery"],<span style="color: #0000ff;">function</span><span style="color: #000000;">($){
</span><span style="color: #008080;"> 2</span> 
<span style="color: #008080;"> 3</span>   <span style="color: #0000ff;">function</span><span style="color: #000000;"> ScrollTo(opts){
</span><span style="color: #008080;"> 4</span> 
<span style="color: #008080;"> 5</span>     <span style="color: #0000ff;">this</span>.opts =<span style="color: #000000;"> $.extend({},ScrollTo.defaults,opts);
</span><span style="color: #008080;"> 6</span> 
<span style="color: #008080;"> 7</span>     <span style="color: #0000ff;">this</span>.$el = $("html,body"<span style="color: #000000;">);
</span><span style="color: #008080;"> 8</span> 
<span style="color: #008080;"> 9</span> <span style="color: #000000;">  };
</span><span style="color: #008080;">10</span> 
<span style="color: #008080;">11</span>   ScrollTo.prototype.move = <span style="color: #0000ff;">function</span><span style="color: #000000;">(){
</span><span style="color: #008080;">12</span>     <span style="color: #0000ff;">var</span> opts = <span style="color: #0000ff;">this</span><span style="color: #000000;">.opts;
</span><span style="color: #008080;">13</span>     <span style="color: #0000ff;">var</span> dest =<span style="color: #000000;"> opts.dest;
</span><span style="color: #008080;">14</span>     <span style="color: #008000;">//</span><span style="color: #008000;">防止动画未结束多次执行动画</span>
<span style="color: #008080;">15</span>     <span style="color: #0000ff;">if</span>($(window).scrollTop() != dest){<span style="color: #008000;">//</span><span style="color: #008000;">判断是否到达目的地</span>
<span style="color: #008080;">16</span> 
<span style="color: #008080;">17</span>       <span style="color: #0000ff;">if</span>(!<span style="color: #0000ff;">this</span>.$el.is(":animated")){<span style="color: #008000;">//</span><span style="color: #008000;">判断是否在运动</span>
<span style="color: #008080;">18</span> 
<span style="color: #008080;">19</span>         <span style="color: #0000ff;">this</span><span style="color: #000000;">.$el.animate({
</span><span style="color: #008080;">20</span> <span style="color: #000000;">          scrollTop:dest
</span><span style="color: #008080;">21</span> <span style="color: #000000;">        },opts.speed);
</span><span style="color: #008080;">22</span> <span style="color: #000000;">      }
</span><span style="color: #008080;">23</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">24</span> 
<span style="color: #008080;">25</span> <span style="color: #000000;">  };
</span><span style="color: #008080;">26</span>   ScrollTo.prototype.go = <span style="color: #0000ff;">function</span><span style="color: #000000;">(){
</span><span style="color: #008080;">27</span> 
<span style="color: #008080;">28</span>     <span style="color: #0000ff;">var</span> dest = <span style="color: #0000ff;">this</span><span style="color: #000000;">.opts.dest;
</span><span style="color: #008080;">29</span> 
<span style="color: #008080;">30</span>     <span style="color: #0000ff;">if</span>($(window).scrollTop() !=<span style="color: #000000;"> dest){
</span><span style="color: #008080;">31</span>       <span style="color: #0000ff;">this</span><span style="color: #000000;">.$el.scrollTop(dest);
</span><span style="color: #008080;">32</span> <span style="color: #000000;">    }
</span><span style="color: #008080;">33</span> 
<span style="color: #008080;">34</span> <span style="color: #000000;">  };
</span><span style="color: #008080;">35</span>   ScrollTo.defaults =<span style="color: #000000;"> {
</span><span style="color: #008080;">36</span>     dest: 0,<span style="color: #008000;">//</span><span style="color: #008000;">目的地</span>
<span style="color: #008080;">37</span>     speed:800<span style="color: #008000;">//</span><span style="color: #008000;">滚动速度</span>
<span style="color: #008080;">38</span> <span style="color: #000000;">  };
</span><span style="color: #008080;">39</span>   <span style="color: #0000ff;">return</span><span style="color: #000000;"> {
</span><span style="color: #008080;">40</span> <span style="color: #000000;">    ScrollTo:ScrollTo
</span><span style="color: #008080;">41</span> <span style="color: #000000;">  }
</span><span style="color: #008080;">42</span> });

 

 

    

 

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