Existing comment node in html file cause problem when try to sync first time

[fzh90]

I have the exisiting dom I want to sync.

<div id="shared_canvas">
  <!-- simple comment node -->
</div>

I can confirm the error below occurs with both normal html and svg element with comment node inside.
The reason is this._model.val("tagname") returns undefined.

Element.prototype.getDom = function() { 
      var attr_name, attr_value, child, dom, i, setClasses, that, _i, _len, _ref, _ref1;
      this._checkForModel();
      if (this._dom == null) {
        //added support for svg elements using document.createElementNS
        var svg = this._model.val("tagname").match(/g|svg|rect|line|path|ellipse|text|tspan|defs|symbol|use|linearGradient|pattern/g);
        if (svg != null) {
          this._dom = document.createElementNS('http://www.w3.org/2000/svg', this._model.val("tagname"));
        }
        else {
          this._dom = document.createElement(this._model.val("tagname"));
        }

[dmonad]

Thanks for reporting this. I fixed it