CodePen Embed - position-sticky

<main>
  <div>position: static;</div>
  <div>position: sticky;</div>
  <div>position: static;</div>
</main>

main {
  width: 300px;
  height: 120px;
  overflow: auto;
  background: tomato;
}

div {
  width: 200px;
  height: 100px;
  border: 1px solid;
  background: yellow;
  text-align: center;
  line-height: 100px;
  box-sizing: border-box;
}

div:nth-of-type(2) {
  position: sticky;
  top: 0;
  background: cyan;
  opacity: 0.8;
}

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