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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <div id='reactOutput'></div>
            
          
!
            
              .active img {
  border: 1px solid black;
}

.slide img {
  height: 50px;
}

.mainImage img {
  height: 150px;
}
            
          
!
            
              var slideModelFactory = function(text, active) {
  // id is not observable
  var slide = {
    id: _.uniqueId('slide_')
  };
  return mobx.extendObservable(slide, {
    // observable fields
    active: active || false,
    imageText: text,
    // computed
    get imageMain() {
      return 'https://placeholdit.imgix.net/~text?txtsize=33&txt=' + slide.imageText + '&w=350&h=150';
    },
    get imageThumb() {
      return 'https://placeholdit.imgix.net/~text?txtsize=22&txt=' + slide.imageText + '&w=400&h=50';
    }
  });
};

var slideShowModelFactory = function(slides) {
  return mobx.observable({
    // observable
    slides: _.map(slides, function(slide) {
      return slideModelFactory(slide.text, slide.active);
    }),
    // computed
    get activeSlide() {
      return _.find(this.slides, {
        'active': true
      });
    },
    // action
    setActiveSlide: mobx.action('set active slide', function(slideId) {
      // deactivate the current slide 
      this.activeSlide.active = false;
      // set the next slide as active
      _.find(this.slides, {id: slideId}).active = true;
    })
  });
};

var slideShowModel = slideShowModelFactory([{
  text: 'Heloo!',
  active: true
}, {
  text: 'Cool!'
}, {
  text: 'MobX!'
}]);

var mainRenderer = mobxReact.observer(function(props) {
  var slides = props.slideShow.slides;
  var slideClickHandler = _.bind(props.slideShow.setActiveSlide, props.slideShow);
  return React.DOM.div({
      className: 'slideShow'
    },
    React.DOM.div({
        className: 'mainImage'
      },
      React.DOM.img({
        src: props.slideShow.activeSlide.imageMain
      })
    ),
    _.map(props.slideShow.slides, function(slide) {
      return React.createElement(thumbRenderer, {
        slide: slide,
        setActiveSwatch: slideClickHandler
      });
    })
  );
});

var thumbRenderer = mobxReact.observer(React.createClass({
  render: function() {
    var slide = this.props.slide;
    return React.DOM.div({
        className: 'slide' + (slide.active ? ' active' : ''),
        onClick: this.clickHandler
      },
      React.DOM.img({
        src: slide.imageThumb
      })
    );
  },
  clickHandler: function() {
    this.props.setActiveSwatch(this.props.slide.id);
  }
}));

ReactDOM.render(React.createElement(mainRenderer, {
  slideShow: slideShowModel
}), document.getElementById('reactOutput'));
            
          
!
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