обмениваться двумя переменными javaScript
var a = 1,
b = 2;
b = [a, a = b][0];
Sticky Pingu
var a = 1,
b = 2;
b = [a, a = b][0];let a = "red";
let b = "blue";
let c = a; // red
a = b; //over-rides to blue
b = c;
console.log(a);
console.log(b);