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

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    html,
    body {
      width: 100%;
      height: 100%;
    }

    ::-webkit-scrollbar {
      display: none;
    }

    .container {
      display: flex;
      overflow: auto;
      outline: 1px dashed lightgray;
      scroll-snap-type: x mandatory;
      width: 100%;
      height: 128px;
      flex-flow: row nowrap;
    }

    .item {
      line-height: 128px;
      font-size: 64px;
      width: 100%;
      height: 128px;
      text-align: center;
      scroll-snap-align: center;
      flex: none;
    }
  </style>
</head>

<body>
  <div class="container x mandatory-scroll-snapping" dir="ltr">
    <div class="item" style="background: red;">X Mand. LTR</div>
    <div class="item" style="background: blue">2</div>
    <div class="item" style="background: pink">3</div>
    <div class="item" style="background: green">4</div>
    <div class="item" style="background: yellow">5</div>
  </div>
</body>

</html>

了解scroll-snap-type：https://developer.mozilla.org/en-US/docs/Web/CSS/scroll-snap-type