Ember.js: the medium.com approach to the WYSIWYG

there is a great article on medium.com about how do they build their editor http://ift.tt/1wzGmuV

While there are a lot of projects that try to mimic their visual appearance, the original medium.com editor seems to be unique in the way how does it deal with all the browser inconsistencies.

Instead of working with 'contenteditable' area directly and try to fix each problem individually they created an own abstraction level on top of it. You can find a detail description inside the article.

So I'm just trying to wrap my head around it and and will be grateful for any kind of insight how to implement it with Ember.js