JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<div id="divEditable" contenteditable></div>

CSS

#divEditable {
  width: 400px;
  height: 600px;
  background: grey;
  overflow: auto;
  margin-right: 20px;
}

JavaScript

$(function () {
  // localStorage.clear()
  
  $('#divEditable').focusout(function () {
  
  //var content = $(this).text()
  var content = $(this).html().replace(/<(?!br\s*\/?)[^>]+>/g, '');  
  
  localStorage.setItem('div',  content)
  
  loadDiv()
  
  })
})

var loadDiv = function() {
	$('#divEditable').html(localStorage.getItem('div'))
  console.log(localStorage.getItem('div'))
}