JSFiddle - React, Tailwind, and code Playground
HTML
<div id="yr" class="year"></div>
JavaScript
function year(){
var test = '<table border="1px"><thead><tr><th><</th><th colspan="2">2015-2016</th><th>></th><tr></thead><tbody>';
var tr='';
for(var i=0;i<4;i++){
tr += '<tr>';
for(var j=0;j<4;j++){
tr += '<td>'+2015+'</td>';
}
tr +='</tr>';
}
test += tr;
return document.getElementById('yr').innerHTML = test;
}
year();