JSFiddle - React, Tailwind, and code Playground

JavaScript

var html =

	'                                                           \
	  <div>                                                     \
	    <div class="js-alert-box"></div>                        \
	    <form id="my-form-to-validate">                         \
	      <input id="login-username" name="login-username">     \
	    </form>                                                 \
	  </div>                                                   	\
	'
	
// using jQuery:
//
var dom = $( html )
$( 'body' ).append( dom )

// or if you need performance, don't use jQuery
//
var div       = document.createElement( 'div' )
div.innerHTML = html
document.body.appendChild( div )