CSS Cascade Layers
Control the cascade order with @layer, keep specificity low, and understand how unlayered styles fit in.
~2 min readread →
Developer interview notes & guides — Page 6
Focused explanations and longer guides, with worked scenarios, common mistakes and interview exercises across every chapter.
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Showing 121–144 of 825 articles
CSS Dark Mode with prefers-color-scheme
Support light and dark themes with prefers-color-scheme and custom properties, and avoid the flash of the wrong theme.
~2 min readread →
Flexbox vs Grid: Choosing a Layout
Use flexbox for one-dimensional flows and grid for two-dimensional layouts, and know when each is the simpler tool.
~2 min readread →
Inline, Block and Inline-Block
Understand the default display types, how they affect sizing and flow, and why some properties are ignored on inline elements.
~2 min readread →
CSS Print Styles
Style for print with @media print, hide navigation, and control page breaks so documents read well on paper.
~2 min readread →
CSS Text Overflow and Ellipsis
Truncate text with an ellipsis, clamp multiple lines, and fix the flexbox case where truncation refuses to happen.
~2 min readread →
CSS Transforms and Animations
Animate transform and opacity for smooth motion, use transitions and keyframes, and respect reduced-motion preferences.
~2 min readread →
Java Generics Wildcards and PECS
Use ? extends T for producers and ? super T for consumers, and understand why List<String> is not a List<Object>.
~2 min readread →
JavaScript Array Methods: Mutating Versus Returning New
Know which array methods change the original in place and which return a new array, and pick the right one to avoid shared-state bugs.
~2 min readread →
JavaScript Date and Timezone Pitfalls
Parse and format dates without timezone surprises: zero-based months, date-only versus date-time parsing, and why UTC storage avoids drift.
~3 min readread →
JavaScript Number Precision and BigInt
Why 0.1 + 0.2 is not 0.3, where safe integer range ends, and when BigInt is the right tool for large identifiers and money.
~2 min readread →
JavaScript Object Destructuring and Defaults
Destructure objects with renamed bindings and defaults, and learn why only undefined triggers a default while null keeps its value.
~2 min readread →
JavaScript Optional Chaining and Nullish Coalescing
Short-circuit safely with optional chaining and choose ?? over || when 0, empty strings and false are valid values.
~2 min readread →
JavaScript Timeouts with Promise.race
Race a promise against a timer to enforce a deadline, and clean up the timer plus the losing work instead of leaving it running.
~3 min readread →
JavaScript RegExp Stateful Flags and lastIndex
Why a global or sticky RegExp can alternate between matching and failing, and how lastIndex and the g/y flags interact with test and exec.
~2 min readread →
JavaScript Rest and Spread Gotchas
Use spread and rest correctly, and avoid the shallow-copy trap where nested objects are still shared between the original and the copy.
~2 min readread →
JavaScript Symbols and Well-Known Symbols
Create unique property keys, customize object behavior with well-known symbols, and understand why symbols vanish from JSON and Object.keys.
~2 min readread →
Kubernetes ConfigMap Update Behavior
Understand why ConfigMap changes reach volumes but not environment variables, and how to roll a Deployment deliberately.
~2 min readread →
Kubernetes emptyDir Volumes
Share scratch space between containers in a pod with emptyDir, choose the backing medium, and bound its size.
~2 min readread →
Kubernetes Gateway API for Ingress
Route traffic with GatewayClass, Gateway and HTTPRoute, and understand how the Gateway API improves on Ingress.
~2 min readread →
Kubernetes Horizontal Pod Autoscaling
Scale replicas from metrics with the HPA, set sensible targets, and stabilize against flapping.
~2 min readread →
Kubernetes Init Containers
Run setup and dependency waits in init containers before the app starts, and keep startup logic out of the app itself.
~2 min readread →
Kubernetes Pod Security Admission
Enforce pod hardening with the Pod Security Admission levels, and migrate workloads off the removed PodSecurityPolicy.
~2 min readread →
Kubernetes Pod Topology Spread
Spread replicas across zones and nodes with topology spread constraints, and balance availability against scheduling failure.
~2 min readread →
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