Markdown Previewer Project Feedback

Here is my Markdown Previewer:
I’d appreciate any feedback I can get. I’m really struggling to get my head around React and any help in understanding it better would be greatly appreciated. Let me know what you think!

looks great ans it’s working, well done.
it fails some tests tho

I noticed this but I couldn’t understand how. Do you have any suggestions as to what I’m doing wrong? I’ve been working on this for a week now and I can’t understand how if it’s functioning properly why the test isn’t passing.

Ok i figured this out.

you should render inside the #preview element. you seem to render in a different div element.

(thanks to you i found out about showdown library, thx)

I tried placing two divs together:

         <div id='preview' dangerouslySetInnerHTML={this.createMarkup()}
        className='col-xs-10 col-xs-offset-1 full-height'/>

But the test still didn’t pass. Where am I supposed to render the #preview element?
I’m sorry. I’m very new to react and showdown. Showdown seemed simple until I added react on top of it.