初学nodejs，折腾过用handlebars做模板，后来隔了一段重新学习，用了jade，真心简洁……记录一些学习笔记，以备复习。
jade是基于缩进的，所以tab与space不能混用；
属性的设置：link(rel='stylesheet', href='/stylesheets/style.css');
变量的定义：- var users = ["Sally","Joseph","Sam","Mike"] 不要var也可以；
内容赋值：p= user 或 p ${user} 前者常用于内容就是变量，后者常用于拼接'Hello ' + ${user} , p Hello World 则是后者直接为内容；
条件语句：
//case语句 - num = 10 case num when 0 p you have no friends when 1 : p you have friends default p you have #{num} friends //if语句 - options = { description : 'reference conditionals' } - flag = false #user if options.description h2 Description p.description= options.description else if flag h2 Description p.description. User has no description, why not add one... else h1 Description p.description User has no description. - opts = { flag : false } #sum // ! 与 unless 同理 if !opts.flag h2 Hello! p= options.description unless opts.flag h2 World! p= options.description
循环语句：
- for (var i=0;i<3;i++) li shit - var users = ["Sally","Joseph","Sam","Mike"]; - each user in users p= user - addrs = ['BeiJing','GuangZhou','DongGuan'] - for addr in addrs p #{addr} - names = {xing:'ye',ming:'renming'}; - each val,key in names li #{key} : #{val}
多行输出：
p | You are sleeping. | No I just have a rest. p. Second function. Just for testing. script. console.log('Hello world'); console.log('Hello life'); script |console.log('Hello world'); |console.log('Hello life');
注释：
// 注释块 '//-'是服务器端注释
转义 与 非转义 ：
//- 默认和!=是不转义，不安全（标签直接执行）； = 则会转义 安全（标签转字符串） p What's up <escaped> 1 p= 'What s' + ' up <escaped> 2' p = 'What s up <escaped> 3' p!= 'What s' + ' up <escaped> 4' p != 'What s up <escaped> 5'
IE条件注释：
<!--[if IE 8]> p This is IE 8 <![endif]-->
extends ：
//- layout.jade doctype html html head block title title Default title body block content //- index.jade extends ./layout.jade block title title Article Title block content h1 My Article <!doctype html> <html> <head> <title>Article Title</title> </head> <body> <h1>My Article</h1> </body> </html>
filters ：
filters是编译时候运行，所以不能使用动态内容，在服务器端编译。（需要先安装markdown模块）
:markdown
# Markdown
I often like including markdown documents.
script
:coffee
console.log 'This is coffee script'
<h1>Markdown</h1>
<p>I often like including markdown documents.</p>
<script>console.log('This is coffee script')</script>
include :
include ./includes/foot.jade include:markdown article.md //可以是js css等文件 也可以是Filtered Text
Mixins : 创建可重复使用的jade块
mixin article(title) .article .article-wrapper h1= title if block //block关键字，就是块 block else p No content provide +article('Hello world') +article('Hello DongGuang') p This is my p Hometown
mixin link(href, name) //- attributes == {class: "btn"} a(class!=attributes.class, href=href)= name +link('/foo', 'foo')(class="btn")
直接输出文本： 前面加 | 例如：|Plian text can include <strong>html<strong> 否则会把Plian当做标签<Plian></Plian>
子集标签除了缩进，还支持a: span: em 这种写法，冒号后面必须加空格。