JSFiddle - React, Tailwind, and code Playground

HTML

<div contenteditable="true" id="divTest" style="border: 1px solid red"></div>
<input type="button" value="Hide the div and look at the console ..." onclick="experiment()"/>

JavaScript

function experiment() {
	let divTest = document.getElementById("divTest")
  // show the content
  console.log(divTest.innerText)
  // hide the div
  divTest.style.display = 'none'
  // check the content : the new lines are gone
  console.log(divTest.innerText)  
}