Основы ES6

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}.`);

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

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

(function() { 

if (false) {

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

 }

 return typeof f;

 })()

typeof (function* f() { yield f })().next().next()

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

class Slave { // ... };

 const slave = Slave();