Swapping two variables in javascript

swap.js

function swapUsingThirdVariable(a, b) {
  var c = a;
  a = b;
  b = c;
}

function swapNumbersWithoutThirdVariable(a, b) {
  a = a + b;
  b = a - b;
  a = a - b;
}

function swapUsingES6Destructuring(a, b) {
  [a, b] = [b, a];
}