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

(function() {

 let f = this ? class g { } : class h { };

 return [ typeof f, typeof h ];

 })();

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

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

const PI = 3.14; 

console.log(PI) //Imprime 3.14

let titleElements = document.querySelectorAll('.article .title') let titles = Array.from(titleElements).map( t => t.textContent ); console.log(titles);

let a = 12, b = 3;

[a, b] = [b, a];

class Slave { // ... };

 const slave = Slave();