Bootstrap

by the_smaug

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<button id="button">Clique</button>

<div id="panel">
  Lorem ipsum dolor sit amet, consectetur adipisicing elit. Similique unde atque, perspiciatis pariatur reprehenderit praesentium impedit facere vel adipisci error tempore in perferendis repellendus quam, fuga libero vitae dolorum incidunt.
</div>

<div id="modal"></div>

JavaScript

$('#button').on('click', function(){
	//Copie le contenu du panel
  var cloneText = $('#panel').clone()[0].textContent;

	//Insere le contenu copié dans la modale
	$('#modal')[0].textContent = cloneText;
});