anchor.diff: +import "dart:html";
  +import 'dart:js';
  +
   import "package:react/react.dart" as react;
   import "package:react/react_client.dart";
  -import "dart:html";
  -
   
   var ChildComponent = react.registerComponent(() => new _ChildComponent());
   class _ChildComponent extends react.Component {
  
positive.code: 
  var ParrentComponent = react.registerComponent(() => new _ParrentComponent());
  class _ParrentComponent extends react.Component {
    showInputValue(_) {
      var input = react.findDOMNode(ref('inputRef')) as InputElement;
      print(input.value);
  
negative.code:   setClientConfiguration();
    var component = ParrentComponent({});
    react.render(component, mountedNode);
  }
  