JSFiddle - React, Tailwind, and code Playground

HTML

<div id="my_example_id" class="ShinyClass">
   My important text
   <span> Here</span>
</div>

JavaScript

var ele = document.getElementById("my_example_id");
var definition = getElementDefinition(ele);
alert(definition);

function getElementDefinition(e){
    var clone = e.cloneNode(true);
	clone.innerHTML = "";
	return clone.outerHTML;
}