test-loading-order/10.html at master · bitforcesrl/test-loading-order · GitHub

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<!DOCTYPE html>
<html lang="en">

  <head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, initial-scale=1.0">
    <title>you can use the onload trick to apply asap the css to the page, but if there are other blocking
      resources the rendering will remains blocked
    </title>

    <link rel="preload"
          as="style"
          media="screen"
          href="http://localhost:3000/static?file=style1.css&delay=2000"
          onload="this.onload=null;this.rel='stylesheet'">

    <script src="http://localhost:3000/static?file=js1.js&delay=1000">
    </script>
  </head>

  <body>
    12
    <img src="http://localhost:3000/random-image/100/100"
         width="100">
  </body>

</html>