JSFiddle - React, Tailwind, and code Playground

HTML

<folder class="test">
  1.)This is test folder
</folder><br>
<folder class="test">
  2.)this is test folder
</folder><br>
<folder class="test">
  3.)this is test folder
</folder><br>
<folder>
  4.)first:level: this is not test folder
</folder><br>
<folder>
  5.)This is not test folder
</folder><br>
<folder>
  6.)This is not test folder
</folder><br>
<folder>
  7.)This is not test folder
</folder><br>

CSS

folder:not(.test) {
  background-color:yellow;
}