JS Shorthand - Variables

Declaring Multiple Variables

//Longhand
let a
let b = "abc"

//Shorthand
let a,  b = "abc"

Assigning Values to Multiple Variables

//Longhand
x = 1
y = 2
z = 3

//Shorthand
let [x, y, z] = [1, 2, 3]

Assigning Default Values to a Variables

//Longhand
let finalName
let name = getName()
if (name !== null && name !== undefined && name !== "") {
  finalName = name
} else {
  finalName = "John Doe"
}

//Shorthand
let finalName = getName() || "John Doe"

Swapping the Values of Two Variables

let x = 1, y = 2

//Longhand
const temp = x
x = y
y = temp

//Shorthand
[x, y] = [y, x]