How to enter pictures in a text field (as in TinyMce)?

Question

JavaScript

How does TinyMce implement inserting images into a text field?
It is necessary for the blog engine that the input field looks like this:

Answer 1

<div contenteditable="true"></div>

Answer 2

in fact it is a text field and a frame prntscr.com/7opf77

Answer 3

hahahaha. Ajax you load on the server then you add to the form. (google js insert into image input).