What the heck is the tool/plugin for html/jsx entry interpreter?

I had set this up in another instance of Intellij, but can't recall what it was. The plugin allows you to type in something like this:

ul.list-group>li.list-group-item

in the body of the render process

and upon entry will expand it out to 

<ul className="list-group">

   <li className="list-group-item"></li>

</ul>

what is this thing?