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Sass+require는 사이드바를 구현합니다.

WBOY
풀어 주다： 2016-09-23 03:30:12
원래의
1082명이 탐색했습니다.

1. 렌더링(아래) 및 사용된 기법

페이지 오른쪽에 고정 사이드바 스타일을 구현하려면 sass를 사용하고, 상단으로 돌아가는 기능은 require.js를 사용해서 구현하세요

2. 새스

Sass의 구체적인 소개에 대해서는 자세히 다루지 않겠습니다. Sass의 두 가지 컴파일 방법에 대해 이야기해 보겠습니다.

가. 코알라 편성

Koala는 Less, Sass, CoffeeScript의 즉각적인 컴파일을 지원하는 데스크톱 프로그램입니다. 다운로드 주소: http://koala-app.com/

Koala는 명령을 입력하지 않고도 scss를 직접 컴파일할 수 있으며, 구체적인 사용 방법은 http://www.w3cplus.com/preprocessor/sass-gui-tool-koala.html을 참조하세요.

참고: 이 컴파일 방법은 더 편리합니다. koalo를 다운로드하고 새 *.scss 파일을 만든 다음 작업 공간으로 끌어서 "완료"를 클릭하면 별도의 작업 없이 작업 공간에 추가된 파일을 모니터링할 수 있습니다. 클릭할 때마다 편집하세요.

b. Sass 명령 컴파일(권장)

이 방법에는 다음 단계가 필요합니다.

(1) Sass는 Ruby 환경에 따라 달라지므로 Sass를 설치하기 전에 Ruby가 설치되어 있는지 확인하세요. 공식 웹사이트 다운로드: 루비

설치 중 PATH에 Ruby 실행 파일 추가 옵션을 확인하고 환경 변수를 추가하세요. 그렇지 않으면 나중에 컴파일된 소프트웨어를 사용할 때 Ruby 환경을 찾을 수 없다는 메시지가 표시됩니다

                                                                                (2) Ruby 설치 후 시작 메뉴에서 방금 설치한 Ruby를 찾아 Ruby로 명령 프롬프트 시작을 엽니다

                                                                               

그런 다음 명령줄에 직접 입력하세요.

Enter를 눌러 설치에 실패하면 http://www.w3cplus.com/sassguide/install.html에서 사진 속 "sass 설치 파일"을 직접 다운로드 받으실 수 있습니다. 
<span style="color: #008080;"> gem install sass</span>
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다운로드 후 Ruby 설치 디렉터리 아래 gems 폴더에 넣습니다(아래 그림 참조)

설치가 완료되면 명령줄에 다음 명령을 입력할 수 있습니다.

* Sass 버전의 명령 동작 보기 

sass -v
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* 도움말 명령줄을 실행하여 필요한 명령을 볼 수도 있습니다.

* 단일 파일 변환 명령
sass -h
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* 단일 파일 모니터링 명령
  sass style.scss style.css
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* 폴더 모니터링 명령
sass --watch style.scss:style.css
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sass --watch sassFileDirectory:cssFileDirectory
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3. require.js 사용의 기본

다음 구조로 새 디렉토리를 생성합니다

디렉토리 툴바 아래에는 index.html, jquery-1.11.3js, main.js, require.js가 있습니다. 해당 공식 웹사이트에서 require.js 및 jquery-1.11.3.js를 다운로드하세요.

index.html은 다음과 같습니다. 

<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> 　　
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requirejs를 사용하는 방법은 매우 간단합니다. 헤드에 있는 스크립트 태그를 통해서만 도입하면 됩니다(실제로 require.js를 제외한 다른 파일 모듈에서는 더 이상 스크립트 태그를 사용하여 도입하지 않습니다).

주의깊은 학생들은 스크립트 태그에 data-main="main"이라는 추가 사용자 정의 속성이 있다는 것을 알게 될 것입니다. 등호 오른쪽의 메인은 main.js를 나타냅니다. 물론 어떤 이름이라도 사용할 수 있습니다.

이 main은 C나 Java의 main 함수 main과 같은 기본 모듈 또는 입력 모듈을 의미합니다.

main.js는 다음과 같습니다

<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> });
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     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
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     而不是( 注 意 )

npm install require.js   
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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>
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 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> }
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     (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> }
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    (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>
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  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>
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  （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> });
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（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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