From what I understand, this is how Medium organizes the fast retrieval and editing of their rich text. You might want to read this for more information: <a href="https:&#x2F;&#x2F;medium.com&#x2F;medium-eng&#x2F;why-contenteditable-is-terrible-122d8a40e480#.b5dod0r3n" rel="nofollow">https:&#x2F;&#x2F;medium.com&#x2F;medium-eng&#x2F;why-contenteditable-is-terribl...</a><p>I may have missed something, though :-|