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scroll-snap-stop

The scroll-snap-stop CSS property defines whether or not the scroll container is allowed to "pass over" possible snap positions.

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Syntax

/* Keyword values */
scroll-snap-stop: normal;
scroll-snap-stop: always;

/* Global values */
scroll-snap-stop: inherit;
scroll-snap-stop: initial;
scroll-snap-stop: revert;
scroll-snap-stop: revert-layer;
scroll-snap-stop: unset;

Values

normal

When the visual viewport of this element's scroll container is scrolled, it may "pass over" possible snap positions.

always

The scroll container must not "pass over" a possible snap position; and must snap to the first of this elements' snap positions.

Formal definition

Initial value normal
Applies to all elements
Inherited no
Computed value as specified
Animation type discrete

Formal syntax

scroll-snap-stop = 
normal |
always

Examples

Setting different snap stops

The example below demonstrates the contrast between the always and normal values of scroll-snap-stop. The difference in the two scroll-snap-stop values is more noticeable when the scroll-snap-type property is set to mandatory, which is what is used in this example.

HTML

<p>scroll-snap-stop: always (X Mandatory)</p>
<div class="x mandatory-scroll-snapping always-stop">
  <div>1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <div>5</div>
</div>

<p>scroll-snap-stop: always (X Mandatory) on odd child elements</p>
<div class="x mandatory-scroll-snapping always-stop-odd">
  <div>1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <div>5</div>
</div>

<p>scroll-snap-stop: always (X Mandatory) on even child elements</p>
<div class="x mandatory-scroll-snapping always-stop-even">
  <div>1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <div>5</div>
</div>

<p>scroll-snap-stop: normal (X Mandatory)</p>
<div class="x mandatory-scroll-snapping normal-stop">
  <div>1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <div>5</div>
</div>

<p>scroll-snap-stop: always (Y Mandatory)</p>
<div class="y mandatory-scroll-snapping always-stop">
  <div>1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <div>5</div>
</div>

<p>scroll-snap-stop: normal (Y Mandatory)</p>
<div class="y mandatory-scroll-snapping normal-stop">
  <div>1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <div>5</div>
</div>

CSS

/* setting up mandatory scroll-snap on parent */
.x.mandatory-scroll-snapping {
  scroll-snap-type: x mandatory;
}

.y.mandatory-scroll-snapping {
  scroll-snap-type: y mandatory;
}

/* defining scroll-snap alignment on children */
div > div {
  scroll-snap-align: center;
}

/* defining scroll-snap stop on children */
.always-stop > div {
  scroll-snap-stop: always;
}

.always-stop-odd > div:nth-of-type(odd) {
  scroll-snap-stop: always;
}

.always-stop-even > div:nth-of-type(even) {
  scroll-snap-stop: always;
}

.normal-stop > div {
  scroll-snap-stop: normal;
}

Result

Scroll from left to right and from top to bottom in the X and Y boxes below, respectively. In the X and Y boxes where the scroll-snap-stop property is set to always, the scrolling is forced to stop at the snap point even when you scroll fast. However, in the boxes where the scroll-snap-stop property is set to normal, the snap points are skipped when you scroll fast.

If required, you can be selective about the items that are always stopped at inside the scroll container. This is demonstrated in the example below by targeting odd and even items; you can choose a different strategy based on your requirement. In the example below, scrolling does not "pass over" odd and even items in the second and third boxes, respectively.

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
scroll-snap-stop 75 79 103 No 62 15 75 75 103 54 15 11.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/scroll-snap-stop