tests/collapse-adjacent-rules.test.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <link rel="icon" href="/favicon.ico" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Title</title>
    <link rel="stylesheet" href="./tailwind.css" />
  </head>
  <body>
    <div class="custom-component"></div>
    <div class="sm:custom-component"></div>
    <div class="md:custom-component"></div>
    <div class="lg:custom-component"></div>
    <div class="font-bold"></div>
    <div class="sm:font-bold"></div>
    <div class="sm:text-center"></div>
    <div class="md:font-bold"></div>
    <div class="md:text-center"></div>
    <div class="lg:font-bold"></div>
    <div class="lg:text-center"></div>
    <div class="some-apply-thing"></div>
  </body>
</html>