hsh2001/sticky.html

## sticky.html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Sticky!</title>

    <style>
      * {
        margin: 0;
      }

      section {
        height: 100vh;
      }

      .sticky {
        position: sticky;
        top: calc(50vh - 0.5rem);
        left: 30vw;
      }
    </style>
  </head>
  <body>
    <section><h1>hello world</h1></section>
    <section><h1 class="sticky">hello world</h1></section>
    <section>Bye world</section>
  </body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<title>Sticky!</title>

	<style>
	* {
	margin: 0;
	}

	section {
	height: 100vh;
	}

	.sticky {
	position: sticky;
	top: calc(50vh - 0.5rem);
	left: 30vw;
	}
	</style>
	</head>
	<body>
	<section><h1>hello world</h1></section>
	<section><h1 class="sticky">hello world</h1></section>
	<section>Bye world</section>
	</body>
	</html>