Web Performance · Part 7 — Optimizing CLS
Layout jumps happen when content is inserted without reserving space. Set image/iframe dimensions, reserve space for dynamic content and ads, handle font swap, and use transform instead of layout changes.
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Web Performance · Part 2 — Core Web Vitals: LCP, INP & CLS
The three metrics Google uses to score experience: LCP (loading), INP (interaction), CLS (layout stability). What each measures exactly, "good" thresholds, the p75 percentile, and measuring with web-vitals.