anchor.diff:    slide.style.maxHeight = 'none';
     slide.style.zIndex = '1';
   
  -  new Timer(animationTime, () {
  +  new Timer(_animationTime, () {
       slide.style.opacity = '1';
       slide.style.left = '0px';
       var tab = document.querySelector('#$id-tab');
  
positive.code: 
  export 'package:polymer/init.dart';
  
  final List<String> slides = const <String>[
    'info',
    'hier',
    'dep',
    'load',
    'diff'
  ];
  final Duration animationTime = const Duration(milliseconds: 10);
  
  void _noSlide() {
    // Disable all of the slides and tabs
    for (String id in slides) {
      var slide = document.querySelector('#$id-slide');
      slide.style.opacity = '0';
      //slide.style.left = '100px';
  
negative.code: 
  @whenPolymerReady
  void init() {
    HistoryState.setup(_switchSlide, _animationTime);
    _noSlide();
    _switchSlide('load');
  
  