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: https:

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: https://medium.com/medium-eng/why-contenteditable-is-terrible-122d8a40e480#.b5dod0r3n https://medium.com/medium-eng/why-contenteditable-is-terribl... I may have missed something, though :-|