W3Schools Tryit Editor

<!DOCTYPE html>
<html>
<head>
<style>
#container {
  width: 80%;
  aspect-ratio: 2/1;
  margin: auto;
  border: solid black 2px;
  overflow-x: hidden;
  overflow-y: scroll;
  scroll-snap-type: y mandatory;
}

.blue {
  background-color: lightblue;
  width: 90%;
}

.green {
  background-color: lightgreen;
  width: 80%;
}

.pink {
  background-color: lightpink;
  width: 70%;
}

#container > div{
  margin: 5px;
  scroll-snap-align: center;
  scroll-snap-stop: always;
  aspect-ratio: 4/1;
}
</style>
</head>
<body>

<h3>CSS scroll-snap-stop property.</h3>
<p>To see the effect from scroll-snap-stop property, basic scroll snap behaviour must first be established: Scroll-snap-align property is set on child elements to snap on center position, and scroll-snap-type property is set on container to snap vertically.</p>
<p>Now, with scroll-snap-stop property set to always on child elements, scrolling past the next element is prevented when swiping fast with a trackpad or a touch screen.</p>
<p>You need to use a trackpad or a touch screen to see this effect.</p>

</body>
</html>

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<!DOCTYPE html><html><head><style>#container {  width: 80%;  aspect-ratio: 2/1;  margin: auto;  border: solid black 2px;  overflow-x: hidden;  overflow-y: scroll;  scroll-snap-type: y mandatory;}​.blue {  background-color: lightblue;  width: 90%;}​.green {  background-color: lightgreen;  width: 80%;}​.pink {  background-color: lightpink;  width: 70%;}​#container > div{  margin: 5px;  scroll-snap-align: center;  scroll-snap-stop: always;  aspect-ratio: 4/1;}</style></head><body>​<h3>CSS scroll-snap-stop property.</h3><p>To see the effect from scroll-snap-stop property, basic scroll snap behaviour must first be established: Scroll-snap-align property is set on child elements to snap on center position, and scroll-snap-type property is set on container to snap vertically.</p><p>Now, with scroll-snap-stop property set to always on child elements, scrolling past the next element is prevented when swiping fast with a trackpad or a touch screen.</p><p>You need to use a trackpad or a touch screen to see this effect.</p>​<div id="container">  <div class="blue"></div>  <div class="green"></div>