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JavaScript & TypeScript
Short answers about JavaScript & TypeScript. One topic, one working example, no fluff.
- JavaScript & TypeScriptJavaScript closures explained simplyLearn what a JavaScript closure is by building a counter factory whose inner function remembers its variable, plus the classic var loop mistake.October 31, 2026 · 2 min read
- JavaScript & TypeScriptJavaScript map and filter explained with examplesLearn how JavaScript map and filter work on arrays of objects, with a runnable example that filters products by price and chains map.October 27, 2026 · 2 min read