Dev boosts React portfolio Lighthouse score from 30 to 80 with Vite prerendering

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A developer improved their Vite and React single-page application's mobile Lighthouse performance score from 30 to 80 by adding static prerendering at build time. The original site sent an empty HTML shell to browsers, causing slow paint times and leaving search engine crawlers with only 134 words of readable content. By rendering the React component tree to HTML during the build process and hydrating on the client side, crawlers now index over 1,000 words and content appears before JavaScript executes. Additional gains came from deferring non-critical interactive elements like terminal games and animations to idle browser time using requestIdleCallback. Lazy-loading a large charting library only when its section nears the viewport further reduced the initial bundle size and blocking time.

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