JSFiddle - React, Tailwind, and code Playground
HTML
<html>
<body>
<TABLE border="1" >
<CAPTION><EM>A test table with merged cells</EM></CAPTION>
<TR>
<TH colspan="2"> Average</TH>
<TH rowspan="2">Red<BR>eyes </TH>
</TR>
<TR>
<TH>height</TH><TH>weight</TH>
</TR>
<TR>
<TD>1.9<TD>0.003<TD>40%</TD>
</TR>
<TR>
<TD>1.7<TD>0.002<TD>43%</TD>
</TR>
</TABLE>
</body>
</html>