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Uber's React system built on overrides instead of theming props.

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Curator’s note

A genuinely different answer to customization: deep overrides rather than a theme object. Worth studying before you decide your own system's extension model — it makes different trade-offs than everything else on this list.

react
theming
overrides

Org: Uber
Docs Url: https://base.uber.com
Focus: components
Reviewed: 2026-10-01

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