div {
  height: 300px;
  width: 60%;
  max-width: 500px;
  margin: 1rem auto;
  overflow-x: hidden;
  overflow-y: scroll;
}

.scroll, .fixed, .local {
  background-image: url('https://www.visitflorida.com/content/dam/visitflorida/en-us/images/articles/2015/freelance/outdoors/everglades-gallery.jpg.1028.0.imagerendition');
}

scroll {
  background-attachment: scroll;
}

fixed {
  background-attachment: fixed;
}

.local {
  background-attachment: local;
}

.inner {
  width: 100%;
  height: 600px;
  overflow-y: hidden;
}

.addscrollbar {
  margin-bottom: 50rem;
}