CSS - scroll-snap-type

The scroll-snap-type CSS property defines how strictly snap points are enforced on the scroll container in case there is one.

Example

HTML Content

<div class="container mandatoryScrollSnapping">
  <div>1</div>
  <div>2</div>
  <div>3</div>
</div>

<div class="container proximityScrollSnapping">
  <div>1</div>
  <div>2</div>
  <div>3</div>
</div>

CSS Content

.container {
  width: 100%;
  overflow: auto;
  white-space: nowrap;
  scroll-snap-points-x: repeat(100%);
  scroll-snap-type: mandatory;
  font-size: 0;
}

.mandatoryScrollSnapping {
  margin-bottom: 20px;
  scroll-snap-type: mandatory;
}

.proximityScrollSnapping {
  scroll-snap-type: proximity;
}

.container > div {
  width: 100%;
  height: 100px;
  display: inline-block;
  line-height: 100px;
  text-align: center;
  font-size: 50px;
}

.container > div:nth-child(even) {
  background-color: #87EA87;
}

.container > div:nth-child(odd) {
  background-color: #87CCEA;
}

Syntax  

/* Keyword values */
scroll-snap-type: none;
scroll-snap-type: mandatory;
scroll-snap-type: proximity;

/* Global values */
scroll-snap-type: inherit;
scroll-snap-type: initial;
scroll-snap-type: unset;

Values

none
When the visual viewport of this scroll container is scrolled, it must ignore snap points.
mandatory
The visual viewport of this scroll container will rest on a snap point if it isn't currently scrolled. That means it snaps on that point when the scroll action finished, if possible. If content is added, moved, deleted or resized the scroll offset will be adjusted to maintain the resting on that snap point.
proximity
The visual viewport of this scroll container may come to rest on a snap point if it isn't currently scrolled considering the user agent's scroll parameters. If content is added, moved, deleted or resized the scroll offset may be adjusted to maintain the resting on that snap point.

Formal syntax

none | mandatory | proximity

Description  

The scroll-snap-type CSS property defines how strictly snap points are enforced on the scroll container in case there is one.

Specifying any precise animations or physics used to enforce those snap points is not covered by this property but instead left up to the user agent.

Initial valuenone
Applies toscroll containers
Inheritedno
Mediainteractive
Computed valueas specified
Animatableno
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Browser Compatibility  

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support ? 39.0 (39.0) 10-ms- Not supported 9-webkit-
Feature Android Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support Not supported 39.0 (39.0)[1] 39.0 (39.0) Not supported Not supported 9-webkit-

[1] On Firefox Mobile, available since Gecko 39, but behind the preference layout.css.vertical-text.enabled, disabled by default.

Specification

Specification Status Comment
CSS Scroll Snap Points Module Level 1
The definition of 'scroll-snap-type' in that specification.
Working Draft Initial definition

License

© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/css/scroll-snap-type