var a;
var a = 1;
var a,
    b;
var a = 1,
    b;
var a,
    b = 1;
var a = 1,
    b = 2;

let a;
let a = 1;
let a,
    b;
let a = 1,
    b;
let a,
    b = 1;
let a = 1,
    b = 2;

const a = 1;
const a = 1,
    b = 2;

var a = {
    a: 1,
    b: 2
};

var a = {
        a: 1,
        b: 2
    },
    b = {
        x: 1,
        y: 2
    },
    c = [1, 2, 3],
    d = /regex/,
    e = true;

// Destructuring

var {alpha: a, beta: {b, gamma: c}, club: [d, e]} = o;
var {alpha: a, beta: {b, gamma: c}, club: [d, e]} = {
    alpha: 1,
    beta: {
        b: 2,
        gamma: 3
    },
    club: [4, 5]
};
var {type, ...rest} = {
    type: "Cocoa",
    taste: "Sweet"
};
var {...rest} = {
    a: 1,
    b: 2
};

var [a, b] = [0, 1];
var [a, b, ...rest] = [0, 1, 2];