swap numbers in javascript

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

1var first = 5;
2var second = 7;
3[first, second] = [second, first];
4console.log(first, second);
5//answer - 7 5

1var a = 5;
2var b = 3;
3[a, b] = [b, a];

1let a = 1;
2let b = 2;
3let temp;
4
5temp = a;a = b;b = temp;
6a; // => 2
7b; // => 1

1function swap(x, y) {
2    return [y, x];
3}
4
5console.log(swap(2, 3));

1let a = 1;
2let b = 2;
3
4a = a ^ b;b = a ^ b;a = a ^ b;
5a; // => 2
6b; // => 1