JSFiddle - React, Tailwind, and code Playground

HTML

<div class="table">
  <div class="row">
    <div class="cell">test</div>
    <div class="cell">test</div>
    <div class="cell">test</div>
    <div class="cell">test</div>
    <div class="cell">test</div>
  </div>
  <div class="row">
    <div class="cell cell-full">this changes the width of the cell above</div>
  </div>
</div>

CSS

.table {
  display:table;
}

.row {
  display: table-row;
}

.cell {
  display: table-cell;
  padding: 5px;
  border: 1px solid black;
}

.cell-full {
  // full width of table
}