#cls

A layout that jumps while it loads is a measurable metric, not a matter of taste. I built the same page two ways and dropped CLS from 0.559 (POOR) to 0.014 (GOOD) with reserved image boxes and pre-placed slots.

Core Web Vitals tactics are not optional anymore — Google’s INP metric replaced FID in 2024 and the bar for “good” performance is higher across the board. The t

A scheduled job in a multi-tenant NestJS backend kept failing at 2 AM with 'Missing active user in context'. Nobody was logged in, because nobody logs in a cron. Here is the CLS trap and the fix.

Google's Core Web Vitals — LCP (Largest Contentful Paint), CLS (Cumulative Layout Shift), and INP...

A complete developer tutorial on measuring, diagnosing, and eliminating Cumulative Layout Shift in...

Custom font usage can introduce cumulative layout shift (or "jank") to your website. This post shows...

When you optimise your web app, your goal is to make the experience better for the user: That means...