jade/testing/test.js

/**
 * Module dependencies.
 */

var jade = require('./../lib/jade')
  , Compiler = jade.Compiler
  , nodes = jade.nodes;

jade.filters.conditionals = function(block, compiler){
    return new Visitor(block).compile();
};

function Visitor(node) {
    this.node = node;
}

Visitor.prototype.__proto__ = Compiler.prototype;

Visitor.prototype.visit = function(node){
    if (node.name != 'else') this.line(node);
    this.visitNode(node);
};

Visitor.prototype.visitTag = function(node){
  switch (node.name) {
    case 'if':
      // First text -> line
      var condition = node.text[0]
        , block = node.block;
      node = new nodes.Code('if (' + condition + ')');
      node.block = block;
      this.visit(node);
      break;
    case 'else':
      var block = node.block;
      node = new nodes.Code('else');
      node.block = block;
      node.instrumentLineNumber = false;
      this.visit(node);
      break;
    default:
      Compiler.prototype.visitTag.call(this, node);
  }
};

var locals = {
    first: 'tj'
  , last: 0
};

jade.renderFile(__dirname + '/test.jade', { locals: locals }, function(err, html){
  if (err) throw err;
  console.log(html);
});