`scroll-snap-align` CSS property

The scroll-snap-align property specifies the box's snap position as an alignment of its snap area (as the alignment subject) within its snap container's snap port (as the alignment container).

Try it

scroll-snap-align: start;

scroll-snap-align: end;

scroll-snap-align: center;

<section class="default-example" id="default-example">
  <div id="example-parent">
    <div>1</div>
    <div id="example-element">2</div>
    <div>3</div>
  </div>
  <div class="info">Scroll »</div>
</section>

.default-example {
  flex-wrap: wrap;
}

.default-example .info {
  width: 100%;
  padding: 0.5em 0;
  font-size: 90%;
}

#example-parent {
  text-align: left;
  width: 250px;
  height: 250px;
  overflow-x: scroll;
  display: flex;
  box-sizing: border-box;
  border: 1px solid black;
  scroll-snap-type: x mandatory;
}

#example-parent > div {
  flex: 0 0 66%;
  width: 250px;
  background-color: rebeccapurple;
  color: white;
  font-size: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#example-parent > div:nth-child(even) {
  background-color: white;
  color: rebeccapurple;
}

Syntax

css

/* Single keyword value */
scroll-snap-align: none;
scroll-snap-align: center;
scroll-snap-align: start;
scroll-snap-align: end;

/* Two keyword values */
scroll-snap-align: start end;
scroll-snap-align: end center;
scroll-snap-align: center start;

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

Values

One or two values can be specified for the scroll-snap-align property. If one value is set, it is applied to both the block and inline axes. If two values are set, the first value controls the block axis and the second value controls the inline axis.

none: The box does not define a snap position in that axis.
start: The start alignment of this box's scroll snap area, within the scroll container's snapport is a snap position in this axis.
end: The end alignment of this box's scroll snap area, within the scroll container's snapport is a snap position in this axis.
center: The center alignment of this box's scroll snap area, within the scroll container's snapport is a snap position in this axis.

Formal definition

Initial value	`none`
Applies to	all elements
Inherited	no
Computed value	as specified
Animation type	discrete

Formal syntax

scroll-snap-align = 
  [ none | start | end | center ]{1,2}

Specifications

CSS Scroll Snap Module Level 1

scroll-snap-align CSS property