A component library packages recurring interface patterns with defined purpose, anatomy, behavior, content, states, accessibility expectations, and code contracts. Begin with evidence of repeated needs, align design and implementation, and document when not to use each component. Govern contribution, testing, release, migration, and retirement so reuse does not preserve bad patterns.
Who this is for: Design-system teams building shared Figma and code components for several product teams with recurring interface needs.
- Prioritize recurring, consequential patterns whose shared contract reduces real product inconsistency.
- Specify anatomy, variants, states, content, responsive behavior, semantics, and implementation together.
- Run contribution, versioning, adoption, exception, and retirement processes with accountable maintainers.
Select components from evidence
Audit products for repeated patterns, divergent behavior, defects, and upcoming needs. Group by customer job and interaction model rather than visual resemblance alone. Two cards may look alike but serve unrelated semantics; two differently styled selectors may need one shared behavioral foundation.
Prioritize components by reuse, risk, accessibility consequence, maintenance cost, and product demand. Do not begin by recreating every HTML element in Figma. Native platform elements may already provide the right behavior, while complex shared workflows deserve more research and engineering than a simple surface token.
Define a coherent contract
Document purpose, non-use cases, anatomy, content slots, properties, defaults, and supported composition. Keep variants tied to meaningful behavior or context. A variant for every one-off visual request creates a configuration puzzle and shifts design decisions onto consuming teams without guidance.
Specify default, hover, focus, active, selected, disabled, loading, empty, error, and success states as relevant. Include long content, localization, responsive reflow, density, and theme behavior. Define which content is required, optional, truncated, wrapped, or moved so instances remain usable with real data.
Build accessibility into behavior
Choose native semantics and established interaction patterns, then document keyboard behavior, focus, names, roles, states, values, announcements, and errors. Test the code component with manual and automated methods. A well-annotated Figma component cannot supply semantics or prove the implementation follows them.
Provide accessible defaults while allowing necessary labels and context. Restrict overrides that predictably break operation, but avoid claiming the component guarantees conformance wherever it appears. Composition, surrounding headings, duplicate labels, content order, and product logic can make a conforming component fail within a page.
Operate the library as a product
Assign design and engineering maintainers, contribution requirements, review service levels, release versioning, change logs, and support channels. Keep Figma and code releases connected through stable names and documented mappings. Test changes against representative consuming products before broad publication.
Track adoption, overrides, defects, unmet needs, and accessibility findings. Deprecate components with a replacement and migration path rather than deleting them silently. Exceptions can reveal a missing variant or a product-specific need; review patterns instead of forcing every use into the library or accepting permanent forks.
Consolidate hypothetical notification banners
Hypothetical products contain nine visually similar banners with conflicting dismissal, focus, and status behavior.
- Audit hypothetical uses by informational, success, warning, and critical purpose, including actions and persistence.
- Define anatomy, content rules, semantic roles, dismiss behavior, responsive layout, and states without preserving every visual difference.
- Implement and test appropriate status semantics, keyboard access, focus effects, long text, themes, and product composition.
- Publish migration examples, deprecate old banners, monitor exceptions, and fix consuming workflows that misuse the shared component.
Component specification
Keep design, behavior, code, and governance in one traceable contract.
- Purpose, customer jobs, evidence, use cases, non-use cases, anatomy, slots, and composition rules.
- Properties, defaults, variants, states, content rules, responsive behavior, density, themes, and tokens.
- Native semantics, names, roles, keyboard interaction, focus, announcements, errors, and accessibility tests.
- Figma component, code API, package, examples, quality tests, supported platforms, and known limitations.
- Owners, contribution, review, version, release notes, adoption, exception, deprecation, migration, and retirement.
Common mistakes
- Creating variants for every visual permutation without defining which behavior or context each one serves.
- Publishing a polished Figma library while code components retain different names, states, and interaction rules.
- Claiming a shared component guarantees page accessibility regardless of content, composition, and implementation.
Try one
A team requests a new button variant only to make one campaign more prominent. How should maintainers respond?
A strong response asks what action hierarchy and repeated product need the variant represents, then checks existing emphasis, placement, and content options. If the need is campaign-specific, a library variant may create broad misuse. If evidence shows a recurring semantic level, maintainers can define its purpose, contrast, states, API, examples, and migration rather than approving a color exception alone.
Sources
- Figma components guideOfficial Figma guidance on components, instances, properties, and reusable design behavior.
- Figma libraries guideOfficial Figma guidance on publishing and consuming shared components, styles, and variables.