The shimmer effect is a visual technique used in modern user interfaces to create a dynamic and appealing experience. The effect, often seen in mobile and web applications, gives the impression of light moving across a surface, which adds depth and life to static elements. The shimmer effect is used especially to indicate loading processes, to draw attention to specific points or as a subtle animation that improves the user experience without distracting.
Technically, the shimmer effect is achieved with gradients and animations that create a gliding reflection of light across an element. This can be implemented with CSS, JavaScript or specialised libraries that make it easy to add the effect to both simple and complex applications.
The shimmer effect is a visual technique used in modern app and web design to improve the user experience by indicating that content is loading. The effect creates an impression of movement by using gradients that glide across the space where the content will soon be shown. It gives users a visual indication that data is on its way, which reduces perceived waiting time and improves the overall interaction with the application. The shimmer effect is particularly popular in apps where fast and efficient data loading is crucial, and it contributes to a more dynamic and engaging user experience.
More about Shimmer Effect
The shimmer effect is a popular visual technique in modern app and web design that creates an impression of movement and glints of light on the screen. The effect is often used to indicate that content is loading, and it provides a more dynamic and engaging user experience. The shimmer effect is particularly well suited to applications where it is important to keep the user informed and occupied while data is fetched or processed in the background.
Technically, the shimmer effect is achieved with gradients and animations that move across a placeholder element. This creates the impression of light gliding across the surface, reminiscent of a shiny reflection. The effect can be implemented with CSS animations or JavaScript libraries that enable developers to customise the speed, direction and appearance of the shimmer effect to suit the app’s design and functionality.
The shimmer effect can be used in several different contexts, each supporting different types of user interaction:
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Loading indicator: The effect is used as a visual indicator that content is loading. This can be, for example, a list of articles that have not yet been fetched from the server, where the shimmer effect is applied to the placeholders to signal that data is on its way.
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Improved user experience: The shimmer effect can also be used to improve the overall user experience by adding an element of movement and visual interest. This can make the wait more pleasant and reduce the user’s perception of delay.
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Branding and style: The effect can be customised to match an app’s branding and style, which makes it possible to create a coherent visual identity. For example, the colours of the shimmer effect can be adapted to the app’s colour palette, which strengthens brand recognition.
One of the greatest strengths of the shimmer effect is its ability to improve the user experience without requiring significant resources. When implemented well, the effect has little impact on the app’s performance, as it is based mainly on simple animations and gradients. This makes it possible to use the effect across different platforms and devices without compromising on speed or efficiency, although a continuous animation always uses some processing power.
The shimmer effect is also flexible and can be adapted to different design needs. Developers can adjust parameters such as speed, direction and colour to create a distinctive effect that suits the app’s specific requirements. This makes it possible to create a tailored user experience that is both visually appealing and functional.
In practice, the shimmer effect has become a common way of presenting content while it loads in digital applications. It is used in everything from social media platforms to e-commerce apps, where it helps keep the user engaged while data loads. The effect is also used in prototypes and design mock-ups to give a realistic sense of how the final application will look and work.
In summary, the shimmer effect is a powerful visual technique that combines aesthetics, functionality and efficiency in a solution that makes loading content more intuitive and appealing to the user. Its ability to improve the user experience with only a light load on system resources makes it an important tool in the modern app developer’s toolbox, where fast and engaging interactions are required.
Frequently asked questions about Shimmer Effect
What is the shimmer effect, and how does it work in mobile and web apps?
The shimmer effect is a visual technique used in mobile and web applications to improve the user experience by indicating that content is loading. The effect creates the impression of animated streaks of light moving across an empty space, signalling that data will soon be shown.
The shimmer effect works by applying a gradient animation over a placeholder that has the same shape as the content being loaded. When the data has fully loaded, the placeholder is replaced with the actual content, which provides a smooth transition and a more engaging user experience.
Compared with traditional loading indicators, such as spinner icons, the shimmer effect provides a more dynamic and modern feel, as it visually represents where the content will be placed and thereby reduces the user’s perceived waiting time. This makes the shimmer effect a popular choice in modern applications where the user experience is in focus.
How can the shimmer effect improve the user experience in an app?
The shimmer effect shows a sketch-like picture of the content that is on its way, for example grey boxes instead of text and images, with a faint glint of light gliding across them. It tells the user that the app is working and how the page is going to look.
Studies of perceived waiting time suggest that users perceive loading as shorter when they see a structure rather than a blank screen or a spinning indicator. The transition to the real content also becomes smoother, because the layout does not jump. The effect does not remove the waiting time itself, however, so it should be combined with general optimisation of loading.
Which technologies and frameworks support implementing the shimmer effect?
The shimmer effect can be implemented on most platforms. On Android, Facebook published the Shimmer for Android library, and in Jetpack Compose the effect can be created with an animated gradient or third-party libraries. On iOS, libraries such as SkeletonView are often used, or the effect is built with an animated gradient in UIKit or SwiftUI.
In web development, the effect is typically created with CSS, where a linear gradient is animated across placeholders with keyframes. Many component libraries, such as MUI for React, have ready-made skeleton components. Flutter has the shimmer package, and React Native has several similar libraries.
What are the best practices for implementing the shimmer effect without affecting the app's performance?
The shimmer effect should be light to run. On the web, it is a good idea to animate properties such as transform, which the graphics processor can handle efficiently, rather than properties that make the browser recalculate the layout. Animating background-position also avoids layout recalculation but does require the element to be repainted.
The placeholders should have the same size and position as the real content, so that the page does not jump when the content is shown. The effect should be removed as soon as the data is ready and should not be shown for very short loads, where it would only flash. The animation should be discreet and respect the user’s setting for reduced motion. Finally, screen readers should be informed that content is loading.
What is the difference between the shimmer effect and a traditional loading indicator?
A traditional loading indicator, such as a spinning circle or a progress bar, merely shows that something is happening. The user typically sees a blank screen or a blocked page and does not know what is coming.
The shimmer effect is usually applied to skeleton screens, which instead show a rough sketch of the content to come, so that the user can form an impression of the page’s structure. This gives a sense that the content is already on its way. A progress bar is still best when the user is waiting for a longer action of known duration, such as an upload, whereas shimmer suits short loads of content.
Which types of apps typically use the shimmer effect?
The shimmer effect is seen especially in apps where content is fetched from the internet and shown in lists or feeds. This applies to social media, news apps, online shops, streaming services and food delivery apps, among others, where the user often waits for images and text.
The effect is well suited when the layout is predictable, so that the placeholders can resemble the final content, for example cards with an image, a heading and a few lines of text. It is less relevant in apps where the content is already stored locally or where loading is so fast that the user does not notice it. Many design systems now include skeleton components as standard.
Shimmer Effect for dummies
The shimmer effect is a clever visual technique used in apps and on websites to add a touch of life and movement to images or text. Imagine looking at a picture when a soft light suddenly glides across it, as if the sun were shining on it for a brief moment. That is exactly what the shimmer effect does. It is a way of catching the eye and making content more interesting and engaging. Just as a glittering surface catches the eye, the shimmer effect does the same for digital elements, making them livelier and more exciting to look at. It is most often used to show that content is on its way while an app is loading.
