JSFiddle - React, Tailwind, and code Playground

HTML

<div id="mydiv">Содержимое<img></div>

<input type="button" value="div" id="foo">

JavaScript

foo.onclick = function() {
	let isEditable = mydiv.getAttribute('contenteditable') === 'true'
  mydiv.setAttribute('contenteditable', !isEditable)
  mydiv.focus()
}