Pure CSS can achieve parallax scrolling effect, mainly through background-attachment: fixed and hierarchical structure. 1. Use the background-attachment: fixed attribute to make the background image fixed, and use background-size and background-position to realize a full-screen background to form a visual illusion that the background is still when scrolling. 2. Create multiple blocks of different backgrounds through a layered layout, each block applies the same fixed background attribute, so that they are rendered sequentially when scrolling, sandwiched between ordinary content to form multiple layers of parallax. 3. Pay attention to mobile compatibility issues. Browsers such as iOS Safari may not support background-attachment: fixed. You can set alternatives for mobile devices through media queries, such as switching to scrolling backgrounds or hiding parallax areas to ensure that the basic experience is not affected. Although this method is not as flexible as JavaScript, it is lightweight and fast loading, and is suitable for single-page display projects.
sure! Pure CSS implements parallax scrolling effect actually simpler than you think. The key is to use background-attachment: fixed
and hierarchical structure. While it is not as flexible as JavaScript, it is enough for lightweight projects.

Let’s take a look at how to use pure CSS to create a basic and beautiful parallax scrolling effect.
1. Use background-attachment: fixed
This is the most core point in achieving parallax effect. By setting the background image to be fixed and the page content scrolls, the visual illusion of "the background is still and the text is sliding across".

.parallax-section { background-image: url('your-image.jpg'); background-attachment: fixed; background-size: cover; background-position: center; height: 100vh; }
You just need to apply this style to a full-screen height block. When the user scrolls the page, the background is like stillness, contrasting with other normally scrolled content.
Notice:

- The background image should be as large as possible to avoid stretching and deformation.
- Some mobile devices may not support
background-attachment: fixed
, and the display may be different on the mobile phone.
2. Layered layout to create multi-stage parallax
You can create multiple blocks with different backgrounds, each block uses different background images and scrolling behaviors, so that you can simulate multi-level parallax scrolling effects.
The HTML structure is roughly as follows:
<div class="parallax-section"></div> <div class="content-section"> <p>This is normal content</p> </div> <div class="parallax-section-2"></div>
CSS example:
.parallax-section, .parallax-section-2 { background-size: cover; background-position: center; background-attachment: fixed; height: 100vh; } .parallax-section { background-image: url('image1.jpg'); } .parallax-section-2 { background-image: url('image2.jpg'); }
In this way, when you scroll the page, the two parallax blocks will appear in turn, with ordinary content interspersed in the middle, forming a distinctly hierarchical scrolling experience.
3. Pay attention to mobile compatibility issues
As mentioned earlier, background-attachment: fixed
is not supported in some mobile browsers, such as iOS's Safari. If you are particularly concerned about the effects of mobile, there are several ways to deal with it:
- Use alternative background image or color : Set a background color or static image separately for the mobile terminal, which will not affect the overall structure.
- Hide complex parallax areas : hide those parallax blocks directly in media queries, and only display concise content on the mobile terminal.
- Consider progressive enhancement : Use parallax as the icing on the cake, not the feature that must be relied on.
For example, you can write a simple media query to close the disparity on the mobile side:
@media (max-width: 768px) { .parallax-section { background-attachment: scroll; } }
Basically that's it. Although there are many restrictions on parallax scrolling with pure CSS, the advantage is that it is simple and fast loading, which is suitable for introduction pages, single-page websites or product display pages. As long as you choose the pictures and control the rhythm, you can also create very attractive visual effects.
The above is the detailed content of How to create a pure CSS parallax scrolling effect?. For more information, please follow other related articles on the PHP Chinese website!

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