ES6 Fundamentos

const obj = { foo: 1 }; 

obj.bar = 2;

const speed = 'quick'; `The ${speed} brown fox jumps over the lazy dog.`

function mystery(...params) {

  return params; 

}

let a = mystery(1,23,4);

let name = 'Harry';

let occupation = 'wizard';

console.log(`Hi! My name is ${name}. I'm a ${occupation}.`);

let x, { x: y = 1 } = { x };   y;

[...[...'...']].length

typeof (new (class F extends (String, Array) { })).substring

(function() { 

if (false) {

 let f = { g() => 1 };

 }

 return typeof f;

 })()

let point = [1,3], segment = [point,[5,5]], triangle = [...segment,[1,8]];

const [a, , b] = [1, 2, 3]; 

console.log(a, b);