CSS Scroll() Function Used to Create Animation Effects Such as Parallax
What is CSS Parallax Scrolling?
CSS parallax scrolling is a technique where background content moves at a different speed than foreground content. It quickly adds depth and the illusion of motion to any web design via scrolling. Something that was once only achievable with JavaScript is now quickly and commonly used with pure CSS. In order to achieve this, the user must add properties such as transform, perspective, translate, and scroll-behavior.
How does the CSS scroll() function work?
The scroll() function is part of CSS Scroll-Driven Animations, introduced to allow smooth animations to move along with the users behavior and interaction. Integrating scroll() with CSS keyframes and transforms, creating parallax effect can be simple without JavaScript.
When is this function useful?
As previously mentioned, this function has been around for many years, and there are no future plans of it leaving. CSS parallax scroll() function can be used to show statistics, break up sections of text, and moreover make sites more intriguing to the user. Using a scrolling technique to create animations helps tell a visual story to the user. It suggests where the important information on the site page is and engages them to continue to scroll through the site. However, it is important to use sparingly as it can become overwhelming for the user and slowdown performance and usability.
Where was this first seen?
This form of layered animation was originally seen in traditional animation in the 1930’s, in early versions of 2D animation. It then became popularized in animations within video games in the 1980’s. While still very limited, these animations all began with engaging the audience and gaining greater entertainment. The parallax scrolling within web design did not come until the early 2000’s! It first required JavaScript in order for it to function, however in the late 2000’s CSS parallax scrolling was born and has been progressing ever since.
Let’s break it down!
- Create a scroll container in HTML using a .wrapper class
- Add images and text
- Apply CSS properties
Example
Pros
- Engaging and visually appealing
- Creates depth and smooth transitions
- Keeps users interested
Cons
- Can slow down page performance
- Not always mobile-friendly
- Can be distracting if overused
Conclusion
The CSS scroll() function is a simple tool for creating parallax animations and adding visual depth without relying on JavaScript. It is an amazing example of the development of CSS over the past 20 years. By using properties like transform, translate, and perspective, designers can create smooth scrolling effects that enhance user experience. However, just like any animation on a web page, mindful implementation is necessary to maintain both performance and usability.
CSS scroll() Parallax Animation Seminar Slides