CSS & Core Web Vitals | Prevent CLS, Stabilize Layouts & Improve UX
Optimize user experience and Core Web Vitals with CSS best practices to prevent CLS, stabilize layouts, and ensure smooth performance.
CSS & Core Web Vitals | Prevent CLS, Stabilize Layouts & Improve UX
Core Web Vitals are metrics that measure the real-world user experience of a website.
CSS plays a crucial role in preventing layout shifts (CLS), stabilizing content, and improving UX .
This post explains the best practices with live examples .
Understanding CLS (Cumulative Layout Shift)
CLS measures unexpected layout shifts that frustrate users.
Shifts occur when elements move around as the page loads or during interaction.
Info!
Large CLS scores can affect SEO and reduce perceived quality.
1. Reserve Space for Images & Media
Always specify width and height or use aspect-ratio to prevent content jumping.
Image CLS Prevention Example ✏️ Edit ▶ Run <img src="https://via.placeholder.com/400x200" alt="Placeholder Image" width="400" height="200" />
<style>
img {
display: block;
max-width: 100%;
height: auto;
border-radius: 12px;
}
</style>
How it works:
Setting width & height reserves space, so when the image loads…
