How Browsers Load Fonts (FOIT/FOUT) - Art of Efficiently Loading Web Fonts

Description

Claude Code Full Course https://topmate.io/frontendmaster/2085919 My Best Product https://linkooo.in Code Splitting https://www.youtube.com/watch?v=fLfVVu1GyNQ LCP: https://youtu.be/UUx6r0QHjw4 Objects Shape Transition https://youtu.be/fLkDClnUmFs?feature=shared React Virtualized List from Scratch — Render 10,000+ Items with Zero Lag https://youtu.be/BztqNT7z1RI Content: 00:00 Agenda 01:00 System font vs Custom Font 03:30 Self Hosted vs CDN Hosted 06:00 When font is discovered? 07:25 When browser downloads font? 08:80 Problems 09:20 font-display 14:07 Font Compression 15:00 Font Subsetting 17:40 Font Loading 22:50 FOUT 25:08 FOIT 26:00 Preload/PreConnect 28:38 Advanced Solution 🚀 Font loading is one of the most overlooked performance bottlenecks on the web. In this video, we go deep into how browsers discover, download, and render fonts — and every strategy you can use to make your site feel instant. Whether you're using Google Fonts, self-hosting, or shipping a custom brand font, this video covers everything you need to ship fast, flicker-free typography in production. ━━━━━━━━━━━━━━━━━━━━ 💡 WHAT YOU'LL LEARN ━━━━━━━━━━━━━━━━━━━━ ✅ Why custom fonts hurt your LCP and CLS ✅ The exact moment a browser discovers your font in the CRP ✅ When to use font-display: swap vs optional ✅ How subsetting can cut font size by 80%+ ✅ FOUT vs FOIT — which one should you actually choose? ✅ How to use preload and preconnect correctly (most devs get this wrong) ✅ The advanced strategy production teams use to eliminate font flicker entirely ━━━━━━━━━━━━━━━━━━━━ 👨‍💻 WHO IS THIS FOR? ━━━━━━━━━━━━━━━━━━━━ Frontend developers, React/Next.js engineers, and anyone who cares about Core Web Vitals, LCP, and shipping fast websites in production. #browserfonts #foit #fout #frontend #reactjs