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+
+# Jade
+
+  The jade template engine for node.js
+
+## Synopsis
+
+    jade [-h|--help] [-v|--version] [-o|--obj STR]
+         [-O|--out DIR] [-p|--path PATH] [-P|--pretty]
+         [-c|--client] [-D|--no-debug]
+
+## Examples
+
+  translate jade the templates dir
+
+    $ jade templates
+
+  create {foo,bar}.html
+
+    $ jade {foo,bar}.jade
+
+  jade over stdio
+
+    $ jade < my.jade > my.html
+
+  jade over s
+
+    $ echo "h1 Jade!" | jade
+
+  foo, bar dirs rendering to /tmp
+
+    $ jade foo bar --out /tmp
+
+  compile client-side templates without debugging
+  instrumentation, making the output javascript
+  very light-weight. This requires runtime.js
+  in your projects.
+
+     $ jade --client --no-debug < my.jade
+
+## Tags
+
+  Tags are simply nested via whitespace, closing
+  tags defined for you. These indents are called "blocks".
+  
+    ul
+      li
+        a Foo
+      li
+        a Bar
+
+  You may have several tags in one "block":
+  
+    ul
+      li
+        a Foo
+        a Bar
+        a Baz
+
+## Self-closing Tags
+
+  Some tags are flagged as self-closing by default, such
+  as `meta`, `link`, and so on. To explicitly self-close
+  a tag simply append the `/` character:
+
+     foo/
+     foo(bar='baz')/
+
+  Would yield:
+  
+     <foo/>
+     <foo bar="baz"/>
+
+## Attributes
+
+  Tag attributes look similar to HTML, however
+  the values are regular JavaScript, here are
+  some examples:
+  
+    a(href='google.com') Google
+    a(class='button', href='google.com') Google
+
+  As mentioned the attribute values are just JavaScript,
+  this means ternary operations and other JavaScript expressions
+  work just fine:
+  
+    body(class=user.authenticated ? 'authenticated' : 'anonymous')
+    a(href=user.website || 'http://google.com')
+
+  Multiple lines work too:
+
+    input(type='checkbox',
+      name='agreement',
+      checked)
+
+  Multiple lines without the comma work fine:
+
+    input(type='checkbox'
+      name='agreement'
+      checked)
+
+  Funky whitespace? fine:
+
+    input(
+      type='checkbox'
+      name='agreement'
+      checked)
+
+## Boolean attributes
+
+  Boolean attributes are mirrored by Jade, and accept
+  bools, aka _true_ or _false_. When no value is specified
+  _true_ is assumed. For example:
+  
+    input(type="checkbox", checked)
+    // => "<input type="checkbox" checked="checked" />"
+
+  For example if the checkbox was for an agreement, perhaps `user.agreed`
+  was _true_ the following would also output 'checked="checked"':
+  
+     input(type="checkbox", checked=user.agreed)
+
+## Class attributes
+
+  The _class_ attribute accepts an array of classes,
+  this can be handy when generated from a javascript
+  function etc:
+  
+    classes = ['foo', 'bar', 'baz']
+    a(class=classes)
+    // => "<a class="foo bar baz"></a>"
+
+## Class literal
+
+  Classes may be defined using a ".CLASSNAME" syntax:
+  
+     .button
+     // => "<div class="button"></div>"
+  
+  Or chained:
+  
+     .large.button
+     // => "<div class="large button"></div>"
+
+  The previous defaulted to divs, however you
+  may also specify the tag type:
+  
+      h1.title My Title
+      // => "<h1 class="title">My Title</h1>"
+
+## Id literal
+
+  Much like the class literal there's an id literal:
+  
+    #user-1
+    // => "<div id="user-1"></div>"
+
+  Again we may specify the tag as well:
+  
+    ul#menu
+      li: a(href='/home') Home
+      li: a(href='/store') Store
+      li: a(href='/contact') Contact
+
+  Finally all of these may be used in any combination,
+  the following are all valid tags:
+  
+    a.button#contact(style: 'color: red') Contact
+    a.button(style: 'color: red')#contact Contact
+    a(style: 'color: red').button#contact Contact
+
+## Block expansion
+
+  Jade supports the concept of "block expansion", in which
+  using a trailing ":" after a tag will inject a block:
+  
+    ul
+      li: a Foo
+      li: a Bar
+      li: a Baz
+
+## Text
+
+   Arbitrary text may follow tags:
+   
+     p Welcome to my site
+  
+  yields:
+  
+     <p>Welcome to my site</p>
+
+## Pipe text
+
+  Another form of text is "pipe" text. Pipes act
+  as the text margin for large bodies of text.
+
+    p
+      | This is a large
+      | body of text for
+      | this tag.
+      | 
+      | Nothing too
+      | exciting.
+
+  yields:
+  
+    <p>This is a large
+    body of text for
+    this tag.
+
+    Nothing too
+    exciting.
+    </p>
+
+  Using pipes we can also specify regular Jade tags
+  within the text:
+  
+    p
+      | Click to visit
+      a(href='http://google.com') Google
+      | if you want.
+
+## Text only tags
+
+  As an alternative to pipe text you may add
+  a trailing "." to indicate that the block
+  contains nothing but plain-text, no tags:
+
+    p.
+      This is a large
+      body of text for
+      this tag.
+
+      Nothing too
+      exciting.
+
+  Some tags are text-only by default, for example
+  _script_, _textarea_, and _style_ tags do not
+  contain nested HTML so Jade implies the trailing ".":
+  
+    script
+      if (foo) {
+        bar();
+      }
+
+    style
+      body {
+        padding: 50px;
+        font: 14px Helvetica;
+      }
+
+## Template script tags
+
+  Sometimes it's useful to define HTML in script
+  tags using Jade, typically for client-side templates.
+  
+  To do this simply give the _script_ tag an arbitrary
+  _type_ attribute such as _text/x-template_:
+  
+    script(type='text/template')
+      h1 Look!
+      p Jade still works in here!
+
+## Interpolation
+
+  Both plain-text and piped-text support interpolation,
+  which comes in two forms, escapes and non-escaped. The
+  following will output the _user.name_ in the paragraph
+  but HTML within it will be escaped to prevent XSS attacks:
+  
+    p Welcome #{user.name}
+
+  The following syntax is identical however it will _not_ escape
+  HTML, and should only be used with strings that you trust:
+  
+    p Welcome !{user.name}
+  
+## Inline HTML
+
+  Sometimes constructing small inline snippets of HTML
+  in Jade can be annoying, luckily we can add plain
+  HTML as well:
+  
+    p Welcome <em>#{user.name}</em>
+
+## Code
+
+  To buffer output with Jade simply use _=_ at the beginning
+  of a line or after a tag. This method escapes any HTML
+  present in the string.
+  
+    p= user.description
+    
+  To buffer output unescaped use the _!=_ variant, but again
+  be careful of XSS.
+  
+    p!= user.description
+  
+  The final way to mess with JavaScript code in Jade is the unbuffered
+  _-_, which can be used for conditionals, defining variables etc:
+  
+    - var user = { description: 'foo bar baz' }
+    #user
+      - if (user.description) {
+        h2 Description
+        p.description= user.description
+      - }
+
+   When compiled blocks are wrapped in anonymous functions, so the
+   following is also valid, without braces:
+   
+     - var user = { description: 'foo bar baz' }
+     #user
+       - if (user.description)
+         h2 Description
+         p.description= user.description
+
+   If you really want you could even use `.forEach()` and others:
+   
+    - users.forEach(function(user){
+      .user
+        h2= user.name
+        p User #{user.name} is #{user.age} years old
+    - })
+
+   Taking this further Jade provides some syntax for conditionals,
+   iteration, switch statements etc. Let's look at those next!
+
+## Assignment
+
+  Jade's first-class assignment is simple, simply use the _=_
+  operator and Jade will _var_ it for you. The following are equivalent:
+  
+    - var user = { name: 'tobi' }
+    user = { name: 'tobi' }
+
+## Conditionals
+
+  Jade's first-class conditional syntax allows for optional
+  parenthesis, and you may now omit the leading _-_ otherwise
+  it's identical, still just regular javascript:
+  
+    user = { description: 'foo bar baz' }
+    #user
+      if user.description
+        h2 Description
+        p.description= user.description
+
+  Jade provides the negated version, _unless_ as well, the following
+  are equivalent:
+  
+    - if (!(user.isAnonymous))
+      p You're logged in as #{user.name}
+
+    unless user.isAnonymous
+      p You're logged in as #{user.name}
+
+## Iteration
+
+  JavaScript's _for_ loops don't look very declarative, so Jade
+  also provides its own _for_ loop construct, aliased as _each_:
+
+    for user in users
+      .user
+        h2= user.name
+        p user #{user.name} is #{user.age} year old
+
+   As mentioned _each_ is identical:
+   
+     each user in users
+       .user
+         h2= user.name
+
+   If necessary the index is available as well:
+   
+      for user, i in users
+        .user(class='user-#{i}')
+          h2= user.name
+
+   Remember, it's just JavaScript:
+   
+      ul#letters
+        for letter in ['a', 'b', 'c']
+          li= letter
+
+## Mixins
+
+  Mixins provide a way to define jade "functions" which "mix in"
+  their contents when called. This is useful for abstracting
+  out large fragments of Jade.
+
+  The simplest possible mixin which accepts no arguments might
+  look like this:
+  
+      mixin hello
+        p Hello
+
+   You use a mixin by placing `+` before the name:
+
+      +hello
+
+   For something a little more dynamic, mixins can take
+   arguments, the mixin itself is converted to a javascript
+   function internally:
+   
+       mixin hello(user)
+         p Hello #{user}
+
+       +hello('Tobi')
+  
+   Yields:
+
+       <p>Hello Tobi</p>
+
+  Mixins may optionally take blocks, when a block is passed
+  its contents becomes the implicit `block` argument. For
+  example here is a mixin passed a block, and also invoked
+  without passing a block:
+
+      mixin article(title)
+        .article
+          .article-wrapper
+            h1= title
+            if block
+              block
+            else
+              p No content provided
+      
+      +article('Hello world')
+      
+      +article('Hello world')
+        p This is my
+        p Amazing article
+
+   yields:
+   
+       <div class="article">
+         <div class="article-wrapper">
+           <h1>Hello world</h1>
+           <p>No content provided</p>
+         </div>
+       </div>
+
+       <div class="article">
+         <div class="article-wrapper">
+           <h1>Hello world</h1>
+           <p>This is my</p>
+           <p>Amazing article</p>
+         </div>
+       </div>
+
+  Mixins can even take attributes, just like a tag. When
+  attributes are passed they become the implicit `attributes`
+  argument. Individual attributes can be accessed just like
+  normal object properties:
+  
+      mixin centered
+        .centered(class=attributes.class)
+          block
+      
+      +centered.bold Hello world
+      
+      +centered.red
+        p This is my
+        p Amazing article
+  
+   yields:
+   
+       <div class="centered bold">Hello world</div>
+       <div class="centered red">
+         <p>This is my</p>
+         <p>Amazing article</p>
+       </div>
+  
+   If you use `attributes` directly, *all* passed attributes
+   get used:
+   
+      mixin link
+        a.menu(attributes)
+          block
+      
+      +link.highlight(href='#top') Top
+      +link#sec1.plain(href='#section1') Section 1
+      +link#sec2.plain(href='#section2') Section 2
+  
+   yields:
+   
+       <a href="#top" class="highlight menu">Top</a>
+       <a id="sec1" href="#section1" class="plain menu">Section 1</a>
+       <a id="sec2" href="#section2" class="plain menu">Section 2</a>
+   
+   If you pass arguments, they must directly follow the mixin:
+   
+      mixin list(arr)
+        if block
+          .title
+            block
+        ul(attributes)
+          each item in arr
+            li= item
+      
+      +list(['foo', 'bar', 'baz'])(id='myList', class='bold')
+  
+   yields:
+   
+       <ul id="myList" class="bold">
+         <li>foo</li>
+         <li>bar</li>
+         <li>baz</li>
+       </ul>