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CSSeasy4 min read

How to Talk About CSS Specificity Without Tears

A 4-minute mental model for CSS specificity that works in interviews and in real codebases. Covers the (a,b,c) tuple, :is(), !important, and the four rules that decide every cascade.

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JavaScriptmedium7 min read

What the Event Loop Actually Means in an Interview

Forget the diagrams. Here's the mental model frontend interviewers at Google, Meta, and Amazon are listening for when they ask about the JavaScript event loop.

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Async Task Pool — Run Promises with a Concurrency LimithardBuild a useDebounce Hook — Debounce a Value in ReactmediumBuild a useFetch Hook — Data Fetching with CleanupmediumBuild a usePrevious Hook — Track a Value's Last RendereasyImplement an EventEmitter — on, off, emit, oncemediumImplement chunk(arr, size) — Split an Array into GroupseasyImplement classNames() — The clsx UtilityeasyImplement compose and pipe — Function CompositionmediumImplement curry(fn) — Currying in JavaScriptmediumImplement debounce(fn, wait) — Frontend Interview QuestionmediumImplement deepClone(obj) — Handle Cycles, Maps, Sets, DateshardImplement deepEqual(a, b) — Structural EqualitymediumImplement flatten(arr, depth) — Flatten a Nested ArrayeasyImplement get(obj, path, default) — Safe Deep AccessmediumImplement groupBy(arr, key) — Group an ArrayeasyImplement memoize(fn) — Cache Results Without Breaking the ContracteasyImplement once(fn) — Run a Function a Single TimeeasyImplement Promise.all — Frontend Interview QuestionmediumImplement retry(fn, retries, delay) — Retry a PromisemediumImplement throttle(fn, wait) — Frontend Interview Questionmedium

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