// freeCodeCamp · 16 January 2026

How Closures Work in JavaScript: A Handbook for Developers

If you're learning JavaScript, you've probably heard the term "closure" at some point. In many developers' experience, just hearing this word can trigger anxiety. In nearly 17 years of programming experience, I've noticed that closures are one of the...

freeCodeCamp

@freecodecamp · Sumit Saha

www.freecodecamp.org

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