CSS Scroll Snap improves the scrolling experience through adsorption effects. Common scenarios include horizontal scrolling navigation bar, vertical paged scrolling, and local adsorption in multi-column layouts. For horizontal scrolling, you need to set the container to flex layout and use scroll-snap-align: start; for vertical scrolling, you can unify the page height and combine scroll-snap-type: y mandatory; local adsorption is suitable for card lists, and scroll-snap-align: center is commonly used to achieve center sliding. Notes include compatibility issues, incomplete support for some browsers, and conflicts with fixed positioning or transform. It is recommended to test the performance of different devices and browsers during development.

Want to make web pages scroll smoother and more rhythmic? The Scroll Snap feature of CSS is a good choice. It allows your page to automatically "suck" to a specific location when scrolling, giving the user a feeling of being guided to browse. If used well, it will not only improve the experience, but also enhance the readability and concentration of the content.

Let’s take a look at several common usage scenarios and writing methods in practical applications to help you quickly get started with CSS Scroll Snap.

Scroll navigation bar horizontally

If you are going to do a horizontally scrolling content display, such as a picture gallery or product carousel, Scroll Snap is perfect.

 .container {
  scroll-snap-type: x mandatory;
  overflow-x: scroll;
  display: flex;
}

.item {
  scroll-snap-align: start;
  min-width: 100%;
}

After this setting, each scroll will automatically align to the starting position of each .item , visually like turning over page by page.
A few points to note:

• The container must have a clear width, or the child dimensions must be controlled by min-width .
• Use flex or grid layout to ensure that the child elements are arranged correctly.
• If you want the scrollbar to be hidden but still slide, you can use overflow: hidden with the internal scroll container.

Paginal scrolling

Similar to the effect of PPT, swipe up and down and jump directly to the next screen. This practice is often displayed on introduction pages, single page websites, or mobile devices.

 section {
  scroll-snap-align: start;
}

.scroll-container {
  scroll-snap-type: y mandatory;
  overflow-y: scroll;
  height: 100vh;
}

Each section becomes a rolling stop. There are several tips for this solution:

• The page height is best unified, otherwise it is easy to "can't absorb".
• Navigation highlighting or progress indication can be implemented in combination with JS.
• Pay attention to the scaling of the browser address bar affects the height calculation when testing on mobile terminal.

Local adsorption in multi-column layout

Sometimes we don’t need to scroll the entire page, but instead hope that a local area supports scrolling adsorption, such as card lists or sidebar menus.

The implementation method is also very simple:

 .card-list {
  scroll-snap-type: x mandatory;
  overflow-x: auto;
  white-space: nowrap;
}

.card {
  scroll-snap-align: center;
  display: inline-block;
}

Here scroll-snap-align: center allows the card to be displayed in the center, which is more natural than start . This writing method is particularly suitable for horizontal sliding components under the mobile terminal small screen.

You can also add a transition animation:

 .card {
  scroll-snap-align: center;
  transition: transform 0.2s ease;
}

While not all browsers support animation, the experience is better on supported devices.

Notes and compatibility

Although Scroll Snap is good, there are some details to pay attention to:

• Not all browsers fully support it, especially older versions of Safari and IE.
• On some mobile browsers (such as WeChat’s built-in browser), insensitive adsorption may occur.
• If you use position: fixed or transform on the page, it may affect adsorption behavior.

It is recommended to do more testing during development, especially to see if the scrolling is smooth under different devices and browsers.

Basically that's it, Scroll Snap is not complicated, but it's easy to ignore the details. Reasonable use can take your web interaction to a higher level.

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