Different swapping methods in JavaScript.

swap.js

var a = 12, b = 24;

// destructuring assignment
[ a, b ] = [ b, a ];

// addition and difference - 1
a = a + b;
b = a - b;
a = a - b; 

// addition and difference - 2
b = a + ( a = b ) - b;

// using multiplication and division - 1
a = a * b;
b = a / b;
a = a / b; 

// using multiplication and division - 2
b = a * ( a = b ) / b;

// bitwise XOR operator
a = a ^ b;
b = a ^ b;
a = a ^ b;

// using IIFE
a = (function (b) {
    return b;
})(b, b = a)

// using temporary variable
var temp;
temp = a;
a = b;
b = temp;