Working notes from React engagements.
October 26, 2026 · CTRLDevs
styled-components is in maintenance mode and runtime CSS-in-JS cannot run in a Server Component. How to audit what your styling layer actually costs, choose a target (CSS Modules, Tailwind, or a zero-runtime library), and migrate component by component without a restyle.
Read moreOctober 19, 2026 · CTRLDevs
Automated scans catch roughly a third of accessibility defects, and almost none of the ones React introduces. What client-side routing, portals, and conditional rendering break, how to test it, and where the React 19 and Next.js primitives help.
Read moreOctober 12, 2026 · CTRLDevs
Error boundaries stop a blank screen, not a bug. How to wire onCaughtError, onUncaughtError, and onRecoverableError, ship readable source maps, and get reports you can actually act on.
Read moreOctober 5, 2026 · CTRLDevs
INP is three numbers — input delay, processing, presentation — and they have different fixes. How to attribute the slow interaction in the field, reproduce it under CPU throttling, and fix the phase that is actually long.
Read moreSeptember 28, 2026 · CTRLDevs
Implicit App Router caching produced stale pages and surprise dynamic rendering in equal measure. How the explicit `use cache` model changes the work, and the checks we run to establish what a route actually does today.
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