优秀的模板引擎 Jade ，超强可读性，提升开发效率。
为什么需要 Jade ？
减少写代码，提高可读性，提高生活质量。。。
这一层一层的。。。
看 jade 的这个拼接。
Jade 优点：
- 超强的可读性
- 灵活的缩进
- 块扩展
- 代码默认经过编码处理以增强安全性
- 编译及运行时的上下文错误报告
- 命令行的编译支持
- HTML5 模式
- 可选的内存缓存
- 利用过滤器解析树的处理
后面说的什么鬼其实我也不懂，但是最大优点: 超强的可读性 ， 提升开发效率 。
需要 Node.js 环境， 没有装的可以参考 Mac 上配置 Node.js 环境
安装 Jade
# 通过 npm 安装 jade$ npm install jade -g
开始使用
创建 index.jade 文件
index.jade
doctype htmlhtml head title hanks.xyz body p welcome to hanks.xyz
就是这么简单，下面开始将 jade 文件渲染为 html 文件
$ jade index.jade rendered index.html$ cat index.html<!DOCTYPE html><html><head><title>hanks.xyz</title></head><body><p>welcome to hanks.xyz</p></body></html>%
可以看到渲染出来的 index.html 文件是经过压缩过的。我们可以加速 -P 参数格式化渲染的 index.html
$ jade -P index.jade
html:
<!DOCTYPE html><html> <head> <title>hanks.xyz</title> </head> <body> <p>welcome to hanks.xyz</p> </body></html>
还可以加上 -w 参数监听 jade 文件的变化，自动渲染刷新 html 文件
$ jade -P -w index.jade
基本语法
标签
默认，每行开始的 第一个单词 代表一个标签，可以是自定义的标签
jade:
p welcome to hanks.xyzh1 h1 标题h2 h2 标题
html:
<p>welcome to hanks.xyz</p><h1 id="h-标题">h1 标题</h1><h2 id="h-标题">h2 标题</h2>
使用 缩进 代表标签嵌套关系
jade:
div.title h1 title2 p somethingdiv div div.info(name="hanks")
html:
<div class="title"> <h1 id="title">title2</h1> <p> something</p></div><div> <div> <div name="hanks" class="info"></div> </div></div>
class 和 id
jade:
h1.titleh2#title#t_id#t_id.title
html:
<h1 class="title"></h1><h2 id="title"></h2><div id="t_id"></div><div id="t_id" class="title"></div>
### 属性
jade:
a(herf="http://hanks.xyz") hanks.xyzinput#username(name="username",type="text",vaule="jade")
html:
<a herf="http://hanks.xyz">hanks.xyz</a><input id="username" name="username" type="text" vaule="jade">
Plain Text
jade:
p. 1.aa 2.vv 3.cc
html:
<p> 1.aa 2.vv 3.cc</p>
注意 p 标签后面紧跟着一个 .
jade:
p. 1.aa<strong>AA</strong> 2.vv 3.ccp | 1.aa strong AA | 2.vv | 3.cc
html:
<p> 1.aa<strong>AA</strong> 2.vv 3.cc</p><p>1.aa<strong>AA</strong>2.vv 3.cc</p>
注释
jade:
div // h1 单行注释，输出到源文件 //- h3 非缓冲注释 // 这是一个 多行注释
html:
<div> <!-- h1 单行注释，输出到源文件--> <!-- 这是一个 多行注释 --></div>
jade 使用双斜线 // 进行单行注释；
如果不想让注释的内容显示到生成的 html 代码中，可以在双斜线 // 后跟一个单横线 - ；
双斜线 // 后面的注释内容换行并缩进可进行块级注释
参考文章：
Jade中文教程
慕课网视频-带你学习Jade模板引擎
文章来自：http://hanks.xyz
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