How do I destructure nested arrays in JavaScript?

How do I destructure nested arrays in JavaScript?

You can destructure nested arrays by using multiple sets of square brackets. For example, if you have const arr = [[1, 2], [3, 4]];, you can destructure it like this: const [[a, b], [c, d]] = arr;.

What if I only want the first element of the first array?

You can do that by using a single set of brackets for the first element. For example: const [[a]] = arr; will give you a = 1.

Can I skip elements while destructuring?

Yes, you can skip elements by using commas. For example, const [[, b]] = arr; will give you b = 2.

What about default values?

You can assign default values like this: const [[a = 0, b = 0] = []] = arr; which will set a and b to 0 if the values are undefined.