nomyfan/sticky_overlap_title.html

## sticky_overlap_title.html
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Sticky overlap title example</title>
    <style>
      .sticky-title {
        position: sticky;
        top: 2em;
        color: goldenrod;
        font-size: 2em;
        background-color: white;
        display: inline-block;
        z-index: 1;
        /*z-index:1 must be set for the reason that the opacity property is applied to the style named content-box through animation.
          If you don't do this, content-box styled elements will be front of the sticky-title styled elements while animating, because
          opacity property also make elements to create a stacking context.
        */
      }
      .content-box {
        height: 500px;
        background-color: sienna;
        animation-name: fadeIn;
        animation-duration: 2s;
      }
    </style>
  </head>
  <body>
    <div class="sticky-title">Title1</div>
    <div class="content-box"></div>
    <div class="sticky-title">Title2</div>
    <div class="content-box"></div>
    <div class="sticky-title">Title3</div>
    <div class="content-box"></div>
    <div class="sticky-title">Title4</div>
    <div class="content-box"></div>
    <div class="sticky-title">Title5</div>
    <div class="content-box"></div>
  </body>
</html>
	<html lang="en">
	<head>
	<meta charset="UTF-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<title>Sticky overlap title example</title>
	<style>
	.sticky-title {
	position: sticky;
	top: 2em;
	color: goldenrod;
	font-size: 2em;
	background-color: white;
	display: inline-block;
	z-index: 1;
	/*z-index:1 must be set for the reason that the opacity property is applied to the style named content-box through animation.
	If you don't do this, content-box styled elements will be front of the sticky-title styled elements while animating, because
	opacity property also make elements to create a stacking context.
	*/
	}
	.content-box {
	height: 500px;
	background-color: sienna;
	animation-name: fadeIn;
	animation-duration: 2s;
	}
	</style>
	</head>
	<body>
	<div class="sticky-title">Title1</div>
	<div class="content-box"></div>
	<div class="sticky-title">Title2</div>
	<div class="content-box"></div>
	<div class="sticky-title">Title3</div>
	<div class="content-box"></div>
	<div class="sticky-title">Title4</div>
	<div class="content-box"></div>
	<div class="sticky-title">Title5</div>
	<div class="content-box"></div>
	</body>
	</html>