cssとhtmlとパララックスと

とてもシンプルなものはHTMLとCSSだけで実装できるのでびっくり。 CSSすごいねー.

(デモ)https://obscure-cliffs-26990.herokuapp.com/

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

<head>
  <meta charset='UTF-8'>
  <meta name='viewport' content='width=device-width, initial-scale=1.0'>
  <meta http-equiv='X-UA-Compatible' content='ie=edge'>
  <link rel='stylesheet' href='style.css'>
  <title>Document</title>
</head>

<body>

  <div class='container'>

    <section class="sec1 full-height">
      <h3>1</h3>
    </section>

    <section class="sec2 full-height sticky">
      <p>2</p>
      <div class='sticky-inner'>
        <p>★</p>
      </div>
    </section>

    <section class="sec3 full-height">
      <h3>3</h3>
    </section>

    <section class="sec4 full-height sticky">
      <p>4</p>
      <div class='sticky-inner'>
        <p>ぴ</p>
      </div>
    </section>

    <section class="sec1 full-height">
      <p>5</p>
      <p>おしまい。</p>
    </section>

  </div><!-- container -->
</body>
</html>
.container {
  position: relative;
}

.full-height {
  width: 100%;
  height: 100vh !important;
  min-height: 90vh; /* これいる?? */
}

.sec1 {
  background: #6088C6;
}
.sec2 {
  background: #AEC4E5;
}

.sec3 {
  background: #4072B3;
}

.sec4 {
  background: #EB8686;
}

.sticky {
  position: sticky;
  top: 0;
  z-index: -1;

}

.sticky-inner {
  font-size: 150px;
  position: absolute;
  top: calc(50% - 75px);
  left: calc(50% - 75px);
}


/* reset */
html, body {
  width: 100%;
  margin: 0;
  padding: 0; 
}


div, p {
  margin: 0;
  padding: 0;
}

ただ

f:id:tanukikawaii:20180117223823p:plain

position: stickyがIE11未対応。そううまくは行かないねー。