What is the scroll-snap-type property for?
Jun 24, 2025 am 12:37 AMscroll-snap-type is used to control the rolling adsorption behavior of elements in the container, and to achieve precise control of the rolling position by setting the axial direction and stringency. 1. It is often used for layouts such as full-screen sliders, horizontal carousel diagrams, vertical timelines, etc.; 2. It needs to be used in conjunction with scroll-snap-align of child elements, such as setting .container{scroll-snap-type:y mandatory} and .section{scroll-snap-align:start}; 3. The axial value x/y/block determines the scrolling direction, and the strictness value mandatory/proximity determines the adsorption intensity; 4. Common errors include not setting the adsorption attributes of child elements or excessive use of mandatory causes unnatural scrolling; 5. It is recommended to combine animation, test multi-end compatibility and consider old browser fallback solutions.
The scroll-snap-type
property in CSS is used to control how elements behave when scrolling inside a container. It allows you to define whether the scroll should snap to certain points or sections, making for a more controlled and intentional scrolling experience.
This can be especially useful for full-page sliders, image galleries, or any layout where you want users to stop at specific areas as they scroll.
Basic Use Cases
Most of the time, you'll use scroll-snap-type
on a scrolling container — like a div with overflow set to auto or scroll. It works best when combined with scroll-snap-align
on child elements, which tells the browser where those children should align when snapping happens.
For example:
- Full-screen vertical scroll sections
- Horizontal carousels that snap into place
- Vertical times that guide the user through steps
A common setup might look like this:
.container { scroll-snap-type: y mandatory; overflow-y: scroll; height: 100vh; }
And then each child section would have:
.section { scroll-snap-align: start; }
That means each section will snap to the top of the container when scrolling vertically.
Values ??You Should Know
The scroll-snap-type
property takes two values: the axis ( x
, y
, or block
) and the strictness ( mandatory
or proximity
).
-
Axis determines the direction of the snapping behavior.
-
x
means horizontal snapping -
y
means vertical snapping -
block
follows the writing mode (like vertical in some languages)
-
-
Strictness defines how aggressively the browser snaps.
-
mandatory
: the scroll must snap to a point if one is available — good for full page sections -
proximity
: the browser may choose to snap based on speed and position — better for smoother or less restrictive snapping
-
You don't always need to use both values. If you're only working in one direction, it's fine to just specify scroll-snap-type: y;
without including the second value.
Common Pitfalls
One thing people often miss is setting scroll-snap-align
on the child elements. Without that, even with scroll-snap-type
on the parent, nothing will snap.
Also, using scroll-snap-type: mandatory
can sometimes interfere with normal scrolling behavior — especially on mobile devices. Users expect to be able to scroll freely, so forcing a snap too aggressively might feel jarring.
Here are a few tips to avoid issues:
- Test on both desktop and mobile
- Keep the scrollable area large enough for smooth snapping
- Combine with animations or transitions for a poisoned feel
It's also worth noting that not all browsers support every feature of scroll snapping perfectly, though most modern ones do. If you're targeting older browsers, consider adding fallbacks or alternative layouts.
Basically that's it.
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