JavaScript
Stop Hand-Rolling Formatters: The Intl APIs You're Underusing
Intl.NumberFormat, RelativeTimeFormat, ListFormat, and Segmenter replace most hand-rolled formatting and i18n code — here's how to actually use them.
3 min read
Category
JavaScript
10 articles
JavaScript
Date/Time Handling With the Temporal API
Why the legacy Date object keeps causing bugs, what Temporal's PlainDate, ZonedDateTime, and Instant types fix, and how to plan a real migration.
3 min read
JavaScript
The Regular Expressions Engineers Actually Need
A practical tour of the regex features worth mastering — named groups, lookaround, sticky matching, Unicode properties — and when to reach for a parser instead.
3 min read
JavaScript
WeakMap, WeakRef, and Getting Serious About Memory
How WeakMap, WeakRef, and FinalizationRegistry actually work, where each one earns its place, and why most of them belong in library code, not app code.
3 min read
JavaScript
ESM vs CommonJS in 2026: What Actually Matters Now
A practical look at where ESM and CommonJS interop still breaks in 2026, and how to pick a module format for a new library or app without regret.
3 min read
JavaScript
Proxy and Reflect: Practical Metaprogramming in JavaScript
Real-world Proxy traps for validation, reactivity, and guardrails, plus why Reflect exists and when skipping it silently breaks your object.
3 min read
JavaScript
Iterators and Generators: The Machinery Behind for...of
How the iterator protocol and generator functions work under the hood, and where they solve real problems like pagination and lazy sequences.
3 min read
JavaScript
Promise.all, allSettled, race, and any: Picking the Right Combinator
A practical guide to choosing between Promise.all, allSettled, race, and any, with the failure modes each one is actually designed to handle.
3 min read
JavaScript
Closures in Real Codebases, Not Just Interview Questions
Where closures actually show up in production JavaScript — memoization, private state, React hooks, and the memory leaks they quietly cause.
3 min read
JavaScript
The Event Loop, Microtasks, and Macrotasks, Explained Properly
A precise walkthrough of how the JS event loop orders microtasks and macrotasks, with the interleaving bugs that actually bite in production code.
3 min read