JSFiddle - React, Tailwind, and code Playground

by Alex Alex

HTML

<!DOCTYPE html>
<html>

  <head>

  </head>

  <body>

    <table>
      <tr>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
      </tr>
      <tr>
        <td>
          <div></div>
        </td>
        <td>
          <div></div>
        </td>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
      </tr>
      <tr>
        <td>
          <div></div>
        </td>
        <td>
          <div></div>
        </td>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
        </th>
      </tr>
      <tr>
        <th>
          <div></div>
        </th>
        <th>
          <div></div>
  ...

CSS

td, th {
    padding: 0;
}

table,
tr,
th,
td {
  border: none;
  margin: 0px;
  border-spacing: 0px;
  border-collapse: collapse;
}

div {
  width: 5px;
  height: 5px;
  background-color: black;
  display: block;
}