code: function connectMutationObservers() {
                      if (_supportMutationObserver && !_mutationObserversConnected) {
                          _mutationObserverHost.observe(_hostElementNative, {
                              attributes: true,
                              attributeOldValue: true,
                              attributeFilter: [LEXICON.i, LEXICON.c, LEXICON.s]
                          });
  
                          _mutationObserverContent.observe(_isTextarea ? _targetElementNative : _contentElementNative, {
                              attributes: true,
                              attributeOldValue: true,
                              subtree: !_isTextarea,
                              childList: !_isTextarea,
                              characterData: !_isTextarea,
                              attributeFilter: _isTextarea ? ['wrap', 'cols', 'rows'] : [LEXICON.i, LEXICON.c, LEXICON.s]
                          });
  
                          _mutationObserversConnected = true;
                      }
                  }
docs: Connects the MutationObservers if they are supported.