JSFiddle - React, Tailwind, and code Playground

by brigand

HTML

<input type="checkbox" name="" id="">
<div class="piece_flash">
  <div class="piece_block">
    test
  </div>
</div>

CSS

.piece_flash .piece_block
{
    transition: box-shadow 2000ms;
}

:checked + .piece_flash .piece_block
{
    box-shadow: 0 0 10px rgb(212, 218, 233);
}