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What is the spread operator (...) in JavaScript?

The spread operator allows iterable elements such as arrays and objects to be expanded into individual elements. It is commonly used for copying arrays, merging objects, and passing arguments.

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What are JavaScript Closures and how are they useful in practice?

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Explain event delegation in JavaScript and why we should use it.

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1 . What is the difference between let, const, and var?

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JB

Jeevan Bhargav

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This answer is calibrated for technical interviews. Verify benchmarks in local sandboxes before deploying.