how to snap the scroll is css

.parent-container {
  scroll-snap-type: y mandatory;
  overflow-y: scroll;
}

.child-containers {
  height: 100vh;
  scroll-snap-align: start;
}

/* Answer to: "scroll snap css" */

/*
  CSS Scroll Snap is a module of CSS that introduces scroll snap positions,
  which enforce the scroll positions that a scroll container’s scrollport may
  end at after a scrolling operation has completed.

  Here's two guides on how to use this module:
  - https://blog.logrocket.com/how-to-use-css-scroll-snap/
  - https://css-tricks.com/practical-css-scroll-snapping/
*/