Some crazy JavaScript stuff

html.js

function indent(n) { return Array(n+1).join('  '); }

function elem(name, wrap) {
  var before = wrap === false ?
    function() {} : function(n) {
      console.log(indent(n) + '<' + name + '>');
    };
  var after = wrap === false ?
    function() {} : function(n) {
      console.log(indent(n) + '</' + name + '>');
    };
  var _elem = function(e) {
    var childs = [];
    var __elem = function(e) {
      e && childs.push(e);
      return __elem;
    };
    __elem.print = function(n) {
      before(n);
      childs.forEach(function(c) { typeof c === 'function' ? c.print(n+1) : console.log(indent(n)+c); });
      after(n);
    };
    return e ? __elem(e) : __elem;
  };
  _elem.print = function(n) {
    console.log(indent(n) + '<' + name + ' />');
  };
  return _elem;
}

var html = elem('html');
var head = elem('head');
var body = elem('body');
var div = elem('div');
var text = elem(null, false);

html
  (head)
  (body
    (div
      (text
        ('Hello world!')))
    (div))
.print(0);