editing a page with VoodooPad API

change.js

var Page = function(key) {
  var page = document.pageForKey(key),
    data = page.dataAsAttributedString(),
    text = data.mutableString(),
    changed = false;

  this.write = function(msg) {
    changed = true;
    text.appendString(msg);
  };
  
  this.save = function() {
    if (changed) 
      page.setDataWithAttributedString(data);
  };

  return this;
};

var Log = {
  write: function(msg) {
    NSApplication.sharedApplication().delegate().console(msg);
  }
};

function testTimestampChange() {
  Log.write(document.pageForKey('test').modifiedDate());
  var page = new Page('test');
  page.write("foo");
  page.save();
  Log.write(document.pageForKey('test').modifiedDate()); // it changes
}

function main() {
  testTimestampChange();
}