Основы ES6

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

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

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

(function() {
 let f = this ? class g { } : class h { };
 return [ typeof f, typeof h ];
 })();

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

(function() { 
if (false) {
 let f = { g() => 1 };
 }
 return typeof f;
 })()

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

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