Devii · Frontend · 2026-02-25 · 5 min read
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Frontend Upgrades: One Dependency Class Per Sprint
A process note that stays true: measure build, test, and runtime cost after each bounded change.
Bundlers, frameworks, and type checkers do not fail all at once - they fail in sequence once you touch them together. Shipping one upgrade class per sprint (TypeScript, then ESLint, then framework) preserves bisectability.
Collect before/after metrics you already have: CI wall time, `tsc` duration, bundle size from your analyzer, and Core Web Vitals from RUM if available.
If a regression appears, revert a single PR instead of untangling a mega-bump. This article states process truth, not a specific version roadmap.