Intermediate everything in Frontend Dev, page 2
Brand color as a token and CSS custom property
Define a typed color token in JSON, generate a custom property like --color-brand-primary, then reference it with var().
Fixing brand color contrast at the system level
Build a tonal palette with known contrast steps, define semantic text-on-surface token pairs that pass AA, and enforce with automated contrast checks.
Distributing design tokens across web, iOS, and Android
Keep one source-of-truth JSON, transform with a tool like Style Dictionary, emit per-platform formats (CSS vars, Swift, XML) in CI.
Designing a Card component's configurable API
Expose content via composition (slots/children), expose constrained variants as enums, lock spacing and brand tokens.
CSS Modules versus BEM for encapsulation
CSS Modules scope via build-time hashed class names automatically; BEM scopes via disciplined human naming with no tooling.
Center a div with Flexbox on the parent
Set display flex on parent, justify-content center for the main axis, align-items center for the cross axis.
Structure CSS layers for reset, vendor, and components
Declare layer order upfront, place reset earliest, vendor next, your components last so they win.
What problem do CSS Cascade Layers solve?
Layers create explicit priority bands, layer order beats specificity inside, and you control override without selector hacks.
Cross-platform themeable token system
Tier tokens with semantic theme sets that remap primitives per mode, transform to each platform's theme mechanism, and deliver versioned packages.
Structuring docs for multiple audiences
Layer docs by audience, give developers API and code, designers usage and design guidelines, PMs principles and coverage, with shared foundations like tokens and accessibility.
Delivering an urgent design system hotfix
Branch from the released tag, apply a minimal fix, add a regression test, ship a patch version, then forward-port to main.
Contributing a new component variant
Align with maintainers first, follow guidelines, implement with API and tokens, add stories, docs, and tests, then open a PR for review.
Tokens as a single source of truth pipeline
Define tiered tokens in standardized JSON, transform per platform with a build tool, publish versioned packages, and automate in CI.
The role of Storybook in a design system
Storybook renders components in isolation across states, serving as living documentation, a development sandbox, and a base for visual and accessibility testing.
Clickable card: div onClick versus anchor tag
Use an a tag for navigation; it is focusable, keyboard-activatable, announced as a link, and supports open-in-new-tab; a div onClick loses all of that without manual ARIA work.
Architecting multi-brand, dark-mode theming
Tier tokens into primitive, semantic, and component layers; components consume semantic tokens; themes swap by remapping semantic-to-primitive on a scope like data-theme.
Versioning and distributing token updates safely
Publish tokens as a semver package, bump major on breaking changes, deprecate before removing, communicate via changelogs and migration guides.
Transforming tokens for multiple platforms
A transformer like Style Dictionary parses JSON, applies platform transforms, and renders formatted outputs (CSS vars, Swift, Kotlin) via configured platforms.
What design tokens are and why they matter
Tokens are named, platform-agnostic design decisions stored centrally, enabling consistency, theming, and one-place updates.
How BEM tames specificity and !important
BEM names block, element, modifier as flat single classes, keeping specificity low and equal, removing the need for deep selectors and !important.
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