The Optimagio Blog

Make every image faster, lighter, and easier to ship.

Practical guides on image optimization, modern formats, Core Web Vitals, and high-performance web delivery.

Showing posts tagged #frontend-performance · clear

Cumulative Layout Shift (CLS) 5 min read

Prevent Layout Shifts: Set Width & Height Attributes Correctly

Learn how to correctly set width and height attributes on images to maintain aspect ratios and prevent layout shifts during loading, improving Core Web Vitals scores.

June 7, 2026