Quality

Lessons in this group, roughly in build order:

• accessibility — Building components so that people using keyboards, screen readers, magnification, or reduced motion can…
• accessibility-testing — The layered checks — automated, keyboard, screen-reader, and assistive-tech — that verify a component…
• performance — Keeping the cost a consumer pays for the system — bytes shipped, runtime work, and render churn — low…
• a-b-tests-experiments — Running controlled experiments on component or pattern changes so the system evolves on evidence —…
• component-analytics — Measuring which system components are actually used, in what versions, and on which surfaces — the…
• logging — The instrumentation layer baked into components — structured events for render, interaction, and error —…