JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html public "-//W3C//DTD HTML 4.0 Strict//en">
<html lang="en">
<head>
   <title>Page builder</title>
   

   <style>
   /* http://meyerweb.com/eric/tools/css/reset/ 
   v2.0 | 20110126
   License: none (public domain)
   */

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}
   
   h1,h2{ font-weight:bold; }
   
    body
	{ 
		 font-family:sans-serif;
		 font-size:18px;
	}
		 
	.handle
	{
		 display:inline;
		 background-color:gray;
		 width:20px;
		 height:20px;
		 float:left;
		 text-align:center;
		 cursor: move;
	}
		 
	.grow
	{
		font-family:sans-serif;
		background-color:#428cfc;
		width:20px;
		height:20px;
		float:left;
		text-align:center;
		color:#ffffff;
		cursor: pointer;
				
	}
				
	.shrink
	{
		 font-family:sans-serif;
		 background-color:#428cfc;
		 width:20px;
		 height:20px;
		 float:left;
		 text-align:center;
		 color:#ffffff;
		 cursor: pointer;			
	}
	
	.remove
	{
		 font-family:sans-serif;
		 background-color:red;
		 width:20px;
		 height:20px;
		 float:left;
		 text-align:center;
		 color:#ffffff;
		...