Observe changes in TinyMCE from Dart

Question

According to TinyMCE API, the following JavaScript code observe changes in TinyMCE editor:

tinyMCE.init({
   ...
   setup : function(ed) {
          ed.onChange.add(function(ed, l) {
                  console.debug('Editor contents was modified. Contents: ' + l.content);
          });
   }
});

However, I'm unable to run this code from Dart using the js Library. Help is appreciated.

UPDATE: There is a problem in the JS code above. Alternatively, I found this working code in here:

var ed = new tinymce.Editor('textarea_id', { 
  init_setting_item: 1,
}, tinymce.EditorManager);

ed.on('change', function(e) {
  var content = ed.getContent();
  console.log(content);
});

ed.render();

I still need help running the code from Dart. And preferably storing its results in a Dart variable for subsequent processing.

Answer 1

Here's the same code called from Dart :

var ed = new js.Proxy(js.context.tinymce.Editor, 'textarea_id', js.map({ 
  'init_setting_item': 1
}), js.context.tinymce.EditorManager);

js.retain(ed); // retain allows to use 'ed' in the following callback
ed.on('change', new js.Callback.many((e) {
  var content = ed.getContent();
  window.console.log(content);
}));

ed.render();