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How do you use destructuring to swap two variables in JavaScript?

Asked on Oct 05, 2025

Answer

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Destructuring in JavaScript allows you to easily swap two variables without using a temporary variable. Here's how you can do it:

<!-- BEGIN COPY / PASTE -->
        let a = 1;
        let b = 2;

        [a, b] = [b, a];

        console.log(a); // 2
        console.log(b); // 1
        <!-- END COPY / PASTE -->

Additional Comment:

The code swaps the values of "a" and "b" using array destructuring.
"[a, b] = [b, a];" is the key line where the swap happens.
This method is concise and avoids the need for a temporary variable.

✅ Answered with JavaScript best practices.

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