@with css

@with css:'cssmod'

Add a new function named cssmod to the root scope. That function serves CSS compiled from the specified module. Here are two examples with stylus and less:

@with css:'stylus'

@stylus '/foo.css': '''
  border-radius()
    -webkit-border-radius arguments
    -moz-border-radius arguments
    border-radius arguments

  body
    font 12px Helvetica, Arial, sans-serif

  a.button
    border-radius 5px
'''

Compiles the string with stylus and serves the results as /foo.css, with content-type text/css.

You must have stylus installed with npm install stylus.

@with css:'less'

@less '/foo.css': '''
  .border-radius(@radius) {
    -webkit-border-radius: @radius;
    -moz-border-radius: @radius;
    border-radius: @radius;
  }

  body {
    font: 12px Helvetica, Arial, sans-serif;
  }

  a.button {
    .border-radius(5px);
  }
'''

Compiles the string with less and servers the results as '/foo.css', with content-type text/css.

You must have less installed with npm install less.