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 ];

 })();

(function() { 

if (false) {

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

 }

 return typeof f;

 })()

const PI = 3.14; 

console.log(PI) // Печатает 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];

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