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JSFiddle - React, Tailwind, and code Playground

HTML

<table width="100%" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0" border="0" cellpadding="0" cellspacing="0" bgcolor="#dedede" style="-webkit-text-size-adjust:none; line-height: 66%;">
	 <tbody>
		 <tr>
			 <td valign="middle"> <!-- The problem is valign work only with a height element for that cell -->
				 <!-- This next table is the one I want to centre --><table width="400" bgcolor="#ffffff" border="0" cellpadding="0" cellspacing="0" align="center" style="width:400px; height: 300px; position:fixed; margin-left:-200px; margin-top:-150px; top:50%; left:50%; background:...

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JSFiddle - React, Tailwind, and code Playground

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