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Results for “React”
Bites 747
Publishing a component to a private NPM registry
Configure package.json fields and scoped name, build dist, set registry auth, npm publish with access restricted.
The slots pattern for a PageLayout component
Slots are named insertion points so a layout owns structure while consumers fill header, sidebar, and main, via named props or compound subcomponents.
Decoupling Form state from its Field components
Form holds values, errors, and status in context, Fields self-register and read/write via a hook, validation composes per field.
Architecting global and local theming with context
A top-level provider supplies global tokens, nested providers merge local overrides, components read the nearest theme, often backed by CSS variables.
Bundling a component library for tree-shaking
Ship ES modules, mark sideEffects false, preserve named exports, and externalize peers so consumers tree-shake and code-split.
Packaging a design system as an npm dependency
Publish to an npm registry, with package.json holding the version, entry points, and dependencies, and version it via SemVer.
Controlled vs uncontrolled Modal component
Uncontrolled is convenient but inflexible, controlled gives parent full power and predictability, and a hybrid supports both.
Design a personalized ad copy pipeline
Identify sources, choose batch versus streaming, generate and deliver copy via APIs.
Diagnosing slow auto-scaled PaaS workloads
Application metrics like request latency, throughput, and DB query time; infrastructure metrics like CPU, memory, and scaling lag.
Strangler Fig with serverless and an event bus
API Gateway acts as the routing facade, new features run as Lambda functions, an event bus decouples and fans out to new services, and traffic shifts feature by feature until the monolith…
Publish/Subscribe Pattern
Publish/subscribe decouples senders from receivers: publishers emit messages to a topic without knowing who consumes them, and subscribers receive messages from topics they care about.
Request the user's location one time
Add a usage description to Info.plist, set a CLLocationManager delegate, request when-in-use authorization, call requestLocation, handle didUpdateLocations and didFailWithError.
How task cancellation works with async/await
Cancellation is a flag, not a kill; check Task.isCancelled or call checkCancellation, URLSession throws CancellationError automatically.
Stalled rollouts and progressDeadlineSeconds
With maxUnavailable respected, the rollout pauses partway and old Pods keep serving; progressDeadlineSeconds marks the Deployment as failed after no progress for that window.
End-to-end process for a Modal props API break
Justify and design the change, additive rollout with deprecation, major release plus codemod, comms and adoption tracking.
Design systems across micro-frontends
Shared singletons and version alignment, token-based theming, distribution via shared scopes, stronger governance.
Architecting a federated documentation site
Docs-as-code with a manifest, CI publishing artifacts, a build that pulls and merges, unified deploy.
What is the difference between a Service and an Ingress?
This tests L4 versus L7 networking abstractions. A good answer says Services load-balance to Pods internally while Ingresses route external HTTP to Services via a controller, then gives a path-based scenario.
Angular Universal server memory leak: causes and diagnosis
Incomplete platform destruction, global DOM polyfills, unclosed RxJS; use heap snapshots and --inspect.
Why is Svelte called a 'disappearing framework'?
Tests whether you understand compile-time versus runtime-heavy frameworks. A strong answer says Svelte compiles components to vanilla JS at build time, shipping a tiny runtime instead of a reconciler or virtual DOM. Red flag: claiming there is zero runtime.