JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <div id="elm">
        <p>abcedfg</p>
    </div>
    <input type="button" id="bt" value="内部のhtml"/>
    <input type="button" id="bt2" value="外部のhtml"/>
</body>

JavaScript

$(function(){
   $("#bt").click(function(){
       alert($("#elm").html());
   });

   $("#bt2").click(function(){
       alert($("#elm").prop("outerHTML"));
   });
});