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FE System DesignBeginner40 minutes

Design a Reusable Component Library

Design a shared frontend component library with theming, versioning, and developer-experience trade-offs.

LLM-friendly summary

A beginner frontend system design exercise about building a reusable component library for multiple product teams, with emphasis on theming, versioning, and DX.

Scenario

Five product teams are shipping inconsistent UI primitives. Your job is to design a reusable component library that can scale across teams without forcing a rewrite.

What you need to design

  1. 1Design the API for Button, Modal, Input, and Select.
  2. 2Support multi-brand theming with light and dark modes.
  3. 3Pick a versioning and release model that minimizes consumer breakage.
  4. 4Explain bundling and tree-shaking decisions.
  5. 5Define the docs and adoption strategy.

Concepts

API DesignThemingVersioningTree-shakingDX

Skills

Component ArchitectureDesign SystemsPackage Management

What good solutions are evaluated on

  • - Architecture design and API quality
  • - Theming and extensibility strategy
  • - UX and accessibility considerations
  • - Trade-off clarity and rollout planning

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Open the interactive AlgoReason workspace to sketch the architecture, write notes, and submit for AI evaluation.

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