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75 articles · page 3 of 9
A senior-level workflow to diagnose performance issues: find the bottleneck, verify the hypothesis, ship the fix, and prevent regressions.
A high-signal mental model for LCP, INP, and CLS: what they measure, what actually moves the needle, and how to debug them in real apps.
How large TypeScript codebases stay fast: project references, composite builds, incremental compilation, and clean boundaries.
How to keep TypeScript APIs stable: test your types, design exports intentionally, and avoid leaking internals that you can’t maintain.
How to type a polymorphic component like a design-system author: correct props, correct refs, and zero unsafe casts.
A production-friendly pattern to type form values, errors, and validators using mapped types—no giant unions, no any.
Two TypeScript options that catch real production bugs: safer indexing and optional properties that behave like you think.
Use the satisfies operator to validate objects (routes, feature flags, configs) while preserving literals for great inference and fewer casts.
Stop lying with `as`. Learn production patterns to convert unknown data (fetch, localStorage, env) into safe TypeScript types with guards and assertions.