perf: optimize bundle, assets and mobile sidebar#5
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- drop framer-motion in favor of IntersectionObserver in ScrollReveal - migrate Contact form from antd to MUI; remove antd and @ant-design/icons - swap remaining @ant-design/icons in About to MUI equivalents - lazy-load GitHubCalendar via IntersectionObserver in bento preview - pause canvas animations (Constellation, MatrixRain) and Home typewriter when off-screen or when document is hidden - only animate CursorGlow when cursor moves - memoize BentoCard and stabilize handlers via useMemo - delete 16 unused asset files (~9 MB) - convert 11 images to WebP and resize via sharp script (~2 MB saved) - preload hero avatar with fetchPriority=high inside <picture> - add loading=lazy and decoding=async to non-hero images - redesign mobile drawer: numbered nav, dot indicator, footer with email and social links; remove ChatGPT-like border-left highlight - fix logo spacing between "Xuan" and "Anh" - remove dead header.css and contact.css Main bundle (raw) drops from 658 KB to 412 KB. Largest chunk drops from 360 KB to 82 KB. src/assets drops from ~12 MB to 3.4 MB.
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Summary
scripts/optimize-images.js(sharp); delete 16 unused asset filesBundle impact
Notable changes
ScrollReveal: framer-motion → IntersectionObserver + CSS transitionContact: rebuilt with MUI TextField/Snackbar/AlertTitle, manual validationGitHubPreview: defersreact-github-calendaruntil card enters viewport, with skeleton placeholder matching the real 7×52 grid layoutConstellationBackground,MatrixRain: pause via IntersectionObserver +visibilitychangeCursorGlow: rAF only runs while cursor movesHome: typewriter pauses when section is off-screen or tab hiddenBentoCard:React.memo+useMemohandlers inBentoGrid<picture>with WebP source andfetchPriority="high"on imgloading="lazy",decoding="async"01.–06.) with monospace prefix, accent dot indicator, footer with email + location + social icons; removedborder-leftactive styleTest plan
npm run dev— verify hero avatar loads as WebP, no layout shift on heronpm run build— succeeds, bundle sizes match the table above