優化網頁字型：Vercel 如何協助開發者解決 CLS 與載入效能問題
Original: Optimizing web fonts
Web fonts are an indispensable part of modern web design, but if not handled properly, they often become a bottleneck for performance and…
網頁字型常因載入延遲導致「無樣式文字閃爍（FOUT）」或「隱形文字閃爍（FOIT）」，並引發 CLS 影響 SEO。Vercel 詳細解析了其內建的字型優化機制，包含自動下載 Google Fonts 至本地託管、自動計算並產生 fallback 字型的 CSS 屬性（如 size-adjust），讓開發者無需手動調整即可獲得極佳的 Core Web Vitals 分數。
Web fonts are an indispensable part of modern web design, but if not handled properly, they often become a bottleneck for performance and user experience. In this technical article, Vercel explores the core challenges and solutions in web font optimization.
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