Preventing Layout Shifts
Unexpected layout movement can harm user experience. Images without known dimensions, dynamically inserted content, and late-loading fonts are common causes.
CSS properties such as aspect-ratio, reserved dimensions, and stable layout structures can reduce visual movement.
Preventing Layout Shifts
Reserve Image Space
.thumbnail {
width: 100%;
aspect-ratio: 16 / 9;
object-fit: cover;
}💡 The aspect ratio gives the browser a predictable box before the image is fully rendered.
Key Takeaways
- Reserve space for media whenever possible.
- Stable geometry reduces cumulative layout movement.
Knowledge Check
Which CSS property can help reserve predictable media geometry?