Practical, diagram-first explanations you can read over coffee. 46 posts and counting.
Why JavaScript's sort() compares numbers as strings, why a 'lazy' comparator works in Safari but breaks in Chrome, and the one-line fix.
A bug report, a route map, and three rounds of making it faster — a story about what Big O really measures, why constants win at small n, and why the best algorithm is sometimes deleting the question.
Cross-Origin Resource Sharing in plain language: what blocks your request, what preflight means, and how to fix the errors you'll see in every frontend job.
Two patterns for taming fast events: debounce waits for silence, throttle limits how often. With examples, code, and interview answers.
`||` treats 0 and '' as missing. `??` only treats null/undefined as missing. Know the difference before it bites you in an interview or in prod.
Why your effect reads old state, fires twice, or loops forever — and the simple rules to fix it (interview-ready).
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